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From voze...@apache.org
Subject [04/45] incubator-ignite git commit: IGNITE-386: Squashed changes.
Date Wed, 04 Mar 2015 15:35:06 GMT
http://git-wip-us.apache.org/repos/asf/incubator-ignite/blob/498dcfab/modules/hadoop/src/test/java/org/apache/ignite/internal/processors/hadoop/HadoopDefaultMapReducePlannerSelfTest.java
----------------------------------------------------------------------
diff --git a/modules/hadoop/src/test/java/org/apache/ignite/internal/processors/hadoop/HadoopDefaultMapReducePlannerSelfTest.java b/modules/hadoop/src/test/java/org/apache/ignite/internal/processors/hadoop/HadoopDefaultMapReducePlannerSelfTest.java
new file mode 100644
index 0000000..76988a3
--- /dev/null
+++ b/modules/hadoop/src/test/java/org/apache/ignite/internal/processors/hadoop/HadoopDefaultMapReducePlannerSelfTest.java
@@ -0,0 +1,1006 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.ignite.internal.processors.hadoop;
+
+import org.apache.ignite.*;
+import org.apache.ignite.cache.*;
+import org.apache.ignite.cluster.*;
+import org.apache.ignite.configuration.*;
+import org.apache.ignite.hadoop.mapreduce.*;
+import org.apache.ignite.igfs.*;
+import org.apache.ignite.igfs.mapreduce.*;
+import org.apache.ignite.igfs.secondary.*;
+import org.apache.ignite.internal.*;
+import org.apache.ignite.internal.cluster.*;
+import org.apache.ignite.internal.processors.cache.*;
+import org.apache.ignite.internal.processors.igfs.*;
+import org.apache.ignite.internal.util.typedef.*;
+import org.apache.ignite.lang.*;
+import org.apache.ignite.testframework.*;
+import org.jetbrains.annotations.*;
+
+import java.net.*;
+import java.util.*;
+
+/**
+ *
+ */
+public class HadoopDefaultMapReducePlannerSelfTest extends HadoopAbstractSelfTest {
+    /** */
+    private static final UUID ID_1 = new UUID(0, 1);
+
+    /** */
+    private static final UUID ID_2 = new UUID(0, 2);
+
+    /** */
+    private static final UUID ID_3 = new UUID(0, 3);
+
+    /** */
+    private static final String HOST_1 = "host1";
+
+    /** */
+    private static final String HOST_2 = "host2";
+
+    /** */
+    private static final String HOST_3 = "host3";
+
+    /** */
+    private static final String INVALID_HOST_1 = "invalid_host1";
+
+    /** */
+    private static final String INVALID_HOST_2 = "invalid_host2";
+
+    /** */
+    private static final String INVALID_HOST_3 = "invalid_host3";
+
+    /** Mocked Grid. */
+    private static final MockIgnite GRID = new MockIgnite();
+
+    /** Mocked IGFS. */
+    private static final IgniteFileSystem IGFS = new MockIgfs();
+
+    /** Planner. */
+    private static final HadoopMapReducePlanner PLANNER = new IgniteHadoopMapReducePlanner();
+
+    /** Block locations. */
+    private static final Map<Block, Collection<IgfsBlockLocation>> BLOCK_MAP = new HashMap<>();
+
+    /** Proxy map. */
+    private static final Map<URI, Boolean> PROXY_MAP = new HashMap<>();
+
+    /** Last created plan. */
+    private static final ThreadLocal<HadoopMapReducePlan> PLAN = new ThreadLocal<>();
+
+    /**
+     *
+     */
+    static {
+        GridTestUtils.setFieldValue(PLANNER, "ignite", GRID);
+    }
+
+    /** {@inheritDoc} */
+    @Override protected void beforeTest() throws Exception {
+        GridTestUtils.setFieldValue(PLANNER, "log", log());
+
+        BLOCK_MAP.clear();
+        PROXY_MAP.clear();
+    }
+
+    /**
+     * @throws IgniteCheckedException If failed.
+     */
+    public void testIgfsOneBlockPerNode() throws IgniteCheckedException {
+        HadoopFileBlock split1 = split(true, "/file1", 0, 100, HOST_1);
+        HadoopFileBlock split2 = split(true, "/file2", 0, 100, HOST_2);
+        HadoopFileBlock split3 = split(true, "/file3", 0, 100, HOST_3);
+
+        mapIgfsBlock(split1.file(), 0, 100, location(0, 100, ID_1));
+        mapIgfsBlock(split2.file(), 0, 100, location(0, 100, ID_2));
+        mapIgfsBlock(split3.file(), 0, 100, location(0, 100, ID_3));
+
+        plan(1, split1);
+        assert ensureMappers(ID_1, split1);
+        assert ensureReducers(ID_1, 1);
+        assert ensureEmpty(ID_2);
+        assert ensureEmpty(ID_3);
+
+        plan(2, split1);
+        assert ensureMappers(ID_1, split1);
+        assert ensureReducers(ID_1, 2);
+        assert ensureEmpty(ID_2);
+        assert ensureEmpty(ID_3);
+
+        plan(1, split1, split2);
+        assert ensureMappers(ID_1, split1);
+        assert ensureMappers(ID_2, split2);
+        assert ensureReducers(ID_1, 1) && ensureReducers(ID_2, 0) || ensureReducers(ID_1, 0) && ensureReducers(ID_2, 1);
+        assert ensureEmpty(ID_3);
+
+        plan(2, split1, split2);
+        assert ensureMappers(ID_1, split1);
+        assert ensureMappers(ID_2, split2);
+        assert ensureReducers(ID_1, 1);
+        assert ensureReducers(ID_2, 1);
+        assert ensureEmpty(ID_3);
+
+        plan(3, split1, split2);
+        assert ensureMappers(ID_1, split1);
+        assert ensureMappers(ID_2, split2);
+        assert ensureReducers(ID_1, 1) && ensureReducers(ID_2, 2) || ensureReducers(ID_1, 2) && ensureReducers(ID_2, 1);
+        assert ensureEmpty(ID_3);
+
+        plan(3, split1, split2, split3);
+        assert ensureMappers(ID_1, split1);
+        assert ensureMappers(ID_2, split2);
+        assert ensureMappers(ID_3, split3);
+        assert ensureReducers(ID_1, 1);
+        assert ensureReducers(ID_2, 1);
+        assert ensureReducers(ID_3, 1);
+
+        plan(5, split1, split2, split3);
+        assert ensureMappers(ID_1, split1);
+        assert ensureMappers(ID_2, split2);
+        assert ensureMappers(ID_3, split3);
+        assert ensureReducers(ID_1, 1) && ensureReducers(ID_2, 2) && ensureReducers(ID_3, 2) ||
+            ensureReducers(ID_1, 2) && ensureReducers(ID_2, 1) && ensureReducers(ID_3, 2) ||
+            ensureReducers(ID_1, 2) && ensureReducers(ID_2, 2) && ensureReducers(ID_3, 1);
+    }
+
+    /**
+     * @throws IgniteCheckedException If failed.
+     */
+    public void testNonIgfsOneBlockPerNode() throws IgniteCheckedException {
+        HadoopFileBlock split1 = split(false, "/file1", 0, 100, HOST_1);
+        HadoopFileBlock split2 = split(false, "/file2", 0, 100, HOST_2);
+        HadoopFileBlock split3 = split(false, "/file3", 0, 100, HOST_3);
+
+        plan(1, split1);
+        assert ensureMappers(ID_1, split1);
+        assert ensureReducers(ID_1, 1);
+        assert ensureEmpty(ID_2);
+        assert ensureEmpty(ID_3);
+
+        plan(2, split1);
+        assert ensureMappers(ID_1, split1);
+        assert ensureReducers(ID_1, 2);
+        assert ensureEmpty(ID_2);
+        assert ensureEmpty(ID_3);
+
+        plan(1, split1, split2);
+        assert ensureMappers(ID_1, split1);
+        assert ensureMappers(ID_2, split2);
+        assert ensureReducers(ID_1, 1) && ensureReducers(ID_2, 0) || ensureReducers(ID_1, 0) && ensureReducers(ID_2, 1);
+        assert ensureEmpty(ID_3);
+
+        plan(2, split1, split2);
+        assert ensureMappers(ID_1, split1);
+        assert ensureMappers(ID_2, split2);
+        assert ensureReducers(ID_1, 1);
+        assert ensureReducers(ID_2, 1);
+        assert ensureEmpty(ID_3);
+
+        plan(3, split1, split2);
+        assert ensureMappers(ID_1, split1);
+        assert ensureMappers(ID_2, split2);
+        assert ensureReducers(ID_1, 1) && ensureReducers(ID_2, 2) || ensureReducers(ID_1, 2) && ensureReducers(ID_2, 1);
+        assert ensureEmpty(ID_3);
+
+        plan(3, split1, split2, split3);
+        assert ensureMappers(ID_1, split1);
+        assert ensureMappers(ID_2, split2);
+        assert ensureMappers(ID_3, split3);
+        assert ensureReducers(ID_1, 1);
+        assert ensureReducers(ID_2, 1);
+        assert ensureReducers(ID_3, 1);
+
+        plan(5, split1, split2, split3);
+        assert ensureMappers(ID_1, split1);
+        assert ensureMappers(ID_2, split2);
+        assert ensureMappers(ID_3, split3);
+        assert ensureReducers(ID_1, 1) && ensureReducers(ID_2, 2) && ensureReducers(ID_3, 2) ||
+            ensureReducers(ID_1, 2) && ensureReducers(ID_2, 1) && ensureReducers(ID_3, 2) ||
+            ensureReducers(ID_1, 2) && ensureReducers(ID_2, 2) && ensureReducers(ID_3, 1);
+    }
+
+    /**
+     * @throws IgniteCheckedException If failed.
+     */
+    public void testIgfsSeveralBlocksPerNode() throws IgniteCheckedException {
+        HadoopFileBlock split1 = split(true, "/file1", 0, 100, HOST_1, HOST_2);
+        HadoopFileBlock split2 = split(true, "/file2", 0, 100, HOST_1, HOST_2);
+        HadoopFileBlock split3 = split(true, "/file3", 0, 100, HOST_1, HOST_3);
+
+        mapIgfsBlock(split1.file(), 0, 100, location(0, 100, ID_1, ID_2));
+        mapIgfsBlock(split2.file(), 0, 100, location(0, 100, ID_1, ID_2));
+        mapIgfsBlock(split3.file(), 0, 100, location(0, 100, ID_1, ID_3));
+
+        plan(1, split1);
+        assert ensureMappers(ID_1, split1) && ensureReducers(ID_1, 1) && ensureEmpty(ID_2) ||
+            ensureEmpty(ID_1) && ensureMappers(ID_2, split1) && ensureReducers(ID_2, 1);
+        assert ensureEmpty(ID_3);
+
+        plan(2, split1);
+        assert ensureMappers(ID_1, split1) && ensureReducers(ID_1, 2) && ensureEmpty(ID_2) ||
+            ensureEmpty(ID_1) && ensureMappers(ID_2, split1) && ensureReducers(ID_2, 2);
+        assert ensureEmpty(ID_3);
+
+        plan(1, split1, split2);
+        assert ensureMappers(ID_1, split1) && ensureMappers(ID_2, split2) ||
+            ensureMappers(ID_1, split2) && ensureMappers(ID_2, split1);
+        assert ensureReducers(ID_1, 1) && ensureReducers(ID_2, 0) || ensureReducers(ID_1, 0) && ensureReducers(ID_2, 1);
+        assert ensureEmpty(ID_3);
+
+        plan(2, split1, split2);
+        assert ensureMappers(ID_1, split1) && ensureMappers(ID_2, split2) ||
+            ensureMappers(ID_1, split2) && ensureMappers(ID_2, split1);
+        assert ensureReducers(ID_1, 1);
+        assert ensureReducers(ID_2, 1);
+        assert ensureEmpty(ID_3);
+
+        plan(3, split1, split2, split3);
+        assert ensureReducers(ID_1, 1);
+        assert ensureReducers(ID_2, 1);
+        assert ensureReducers(ID_3, 1);
+
+        plan(5, split1, split2, split3);
+        assert ensureReducers(ID_1, 1) && ensureReducers(ID_2, 2) && ensureReducers(ID_3, 2) ||
+            ensureReducers(ID_1, 2) && ensureReducers(ID_2, 1) && ensureReducers(ID_3, 2) ||
+            ensureReducers(ID_1, 2) && ensureReducers(ID_2, 2) && ensureReducers(ID_3, 1);
+    }
+
+    /**
+     * @throws IgniteCheckedException If failed.
+     */
+    public void testNonIgfsSeveralBlocksPerNode() throws IgniteCheckedException {
+        HadoopFileBlock split1 = split(false, "/file1", 0, 100, HOST_1, HOST_2);
+        HadoopFileBlock split2 = split(false, "/file2", 0, 100, HOST_1, HOST_2);
+        HadoopFileBlock split3 = split(false, "/file3", 0, 100, HOST_1, HOST_3);
+
+        plan(1, split1);
+        assert ensureMappers(ID_1, split1) && ensureReducers(ID_1, 1) && ensureEmpty(ID_2) ||
+            ensureEmpty(ID_1) && ensureMappers(ID_2, split1) && ensureReducers(ID_2, 1);
+        assert ensureEmpty(ID_3);
+
+        plan(2, split1);
+        assert ensureMappers(ID_1, split1) && ensureReducers(ID_1, 2) && ensureEmpty(ID_2) ||
+            ensureEmpty(ID_1) && ensureMappers(ID_2, split1) && ensureReducers(ID_2, 2);
+        assert ensureEmpty(ID_3);
+
+        plan(1, split1, split2);
+        assert ensureMappers(ID_1, split1) && ensureMappers(ID_2, split2) ||
+            ensureMappers(ID_1, split2) && ensureMappers(ID_2, split1);
+        assert ensureReducers(ID_1, 1) && ensureReducers(ID_2, 0) || ensureReducers(ID_1, 0) && ensureReducers(ID_2, 1);
+        assert ensureEmpty(ID_3);
+
+        plan(2, split1, split2);
+        assert ensureMappers(ID_1, split1) && ensureMappers(ID_2, split2) ||
+            ensureMappers(ID_1, split2) && ensureMappers(ID_2, split1);
+        assert ensureReducers(ID_1, 1);
+        assert ensureReducers(ID_2, 1);
+        assert ensureEmpty(ID_3);
+
+        plan(3, split1, split2, split3);
+        assert ensureReducers(ID_1, 1);
+        assert ensureReducers(ID_2, 1);
+        assert ensureReducers(ID_3, 1);
+
+        plan(5, split1, split2, split3);
+        assert ensureReducers(ID_1, 1) && ensureReducers(ID_2, 2) && ensureReducers(ID_3, 2) ||
+            ensureReducers(ID_1, 2) && ensureReducers(ID_2, 1) && ensureReducers(ID_3, 2) ||
+            ensureReducers(ID_1, 2) && ensureReducers(ID_2, 2) && ensureReducers(ID_3, 1);
+    }
+
+    /**
+     * @throws IgniteCheckedException If failed.
+     */
+    public void testIgfsSeveralComplexBlocksPerNode() throws IgniteCheckedException {
+        HadoopFileBlock split1 = split(true, "/file1", 0, 100, HOST_1, HOST_2, HOST_3);
+        HadoopFileBlock split2 = split(true, "/file2", 0, 100, HOST_1, HOST_2, HOST_3);
+
+        mapIgfsBlock(split1.file(), 0, 100, location(0, 50, ID_1, ID_2), location(51, 100, ID_1, ID_3));
+        mapIgfsBlock(split2.file(), 0, 100, location(0, 50, ID_1, ID_2), location(51, 100, ID_2, ID_3));
+
+        plan(1, split1);
+        assert ensureMappers(ID_1, split1);
+        assert ensureReducers(ID_1, 1);
+        assert ensureEmpty(ID_2);
+        assert ensureEmpty(ID_3);
+
+        plan(1, split2);
+        assert ensureMappers(ID_2, split2);
+        assert ensureReducers(ID_2, 1);
+        assert ensureEmpty(ID_1);
+        assert ensureEmpty(ID_3);
+
+        plan(1, split1, split2);
+        assert ensureMappers(ID_1, split1);
+        assert ensureMappers(ID_2, split2);
+        assert ensureReducers(ID_1, 0) && ensureReducers(ID_2, 1) || ensureReducers(ID_1, 1) && ensureReducers(ID_2, 0);
+        assert ensureEmpty(ID_3);
+
+        plan(2, split1, split2);
+        assert ensureMappers(ID_1, split1);
+        assert ensureMappers(ID_2, split2);
+        assert ensureReducers(ID_1, 1);
+        assert ensureReducers(ID_2, 1);
+        assert ensureEmpty(ID_3);
+    }
+
+    /**
+     * @throws IgniteCheckedException If failed.
+     */
+    public void testNonIgfsOrphans() throws IgniteCheckedException {
+        HadoopFileBlock split1 = split(false, "/file1", 0, 100, INVALID_HOST_1, INVALID_HOST_2);
+        HadoopFileBlock split2 = split(false, "/file2", 0, 100, INVALID_HOST_1, INVALID_HOST_3);
+        HadoopFileBlock split3 = split(false, "/file3", 0, 100, INVALID_HOST_2, INVALID_HOST_3);
+
+        plan(1, split1);
+        assert ensureMappers(ID_1, split1) && ensureReducers(ID_1, 1) && ensureEmpty(ID_2) && ensureEmpty(ID_3) ||
+            ensureEmpty(ID_1) && ensureMappers(ID_2, split1) && ensureReducers(ID_2, 1) && ensureEmpty(ID_3) ||
+            ensureEmpty(ID_1) && ensureEmpty(ID_2) && ensureMappers(ID_3, split1) && ensureReducers(ID_3, 1);
+
+        plan(2, split1);
+        assert ensureMappers(ID_1, split1) && ensureReducers(ID_1, 2) && ensureEmpty(ID_2) && ensureEmpty(ID_3) ||
+            ensureEmpty(ID_1) && ensureMappers(ID_2, split1) && ensureReducers(ID_2, 2) && ensureEmpty(ID_3) ||
+            ensureEmpty(ID_1) && ensureEmpty(ID_2) && ensureMappers(ID_3, split1) && ensureReducers(ID_3, 2);
+
+        plan(1, split1, split2, split3);
+        assert ensureMappers(ID_1, split1) && ensureMappers(ID_2, split2) && ensureMappers(ID_3, split3) ||
+            ensureMappers(ID_1, split1) && ensureMappers(ID_2, split3) && ensureMappers(ID_3, split2) ||
+            ensureMappers(ID_1, split2) && ensureMappers(ID_2, split1) && ensureMappers(ID_3, split3) ||
+            ensureMappers(ID_1, split2) && ensureMappers(ID_2, split3) && ensureMappers(ID_3, split1) ||
+            ensureMappers(ID_1, split3) && ensureMappers(ID_2, split1) && ensureMappers(ID_3, split2) ||
+            ensureMappers(ID_1, split3) && ensureMappers(ID_2, split2) && ensureMappers(ID_3, split1);
+        assert ensureReducers(ID_1, 1) && ensureReducers(ID_2, 0) && ensureReducers(ID_3, 0) ||
+            ensureReducers(ID_1, 0) && ensureReducers(ID_2, 1) && ensureReducers(ID_3, 0) ||
+            ensureReducers(ID_1, 0) && ensureReducers(ID_2, 0) && ensureReducers(ID_3, 1);
+
+        plan(3, split1, split2, split3);
+        assert ensureMappers(ID_1, split1) && ensureMappers(ID_2, split2) && ensureMappers(ID_3, split3) ||
+            ensureMappers(ID_1, split1) && ensureMappers(ID_2, split3) && ensureMappers(ID_3, split2) ||
+            ensureMappers(ID_1, split2) && ensureMappers(ID_2, split1) && ensureMappers(ID_3, split3) ||
+            ensureMappers(ID_1, split2) && ensureMappers(ID_2, split3) && ensureMappers(ID_3, split1) ||
+            ensureMappers(ID_1, split3) && ensureMappers(ID_2, split1) && ensureMappers(ID_3, split2) ||
+            ensureMappers(ID_1, split3) && ensureMappers(ID_2, split2) && ensureMappers(ID_3, split1);
+        assert ensureReducers(ID_1, 1);
+        assert ensureReducers(ID_2, 1);
+        assert ensureReducers(ID_3, 1);
+
+        plan(5, split1, split2, split3);
+        assert ensureMappers(ID_1, split1) && ensureMappers(ID_2, split2) && ensureMappers(ID_3, split3) ||
+            ensureMappers(ID_1, split1) && ensureMappers(ID_2, split3) && ensureMappers(ID_3, split2) ||
+            ensureMappers(ID_1, split2) && ensureMappers(ID_2, split1) && ensureMappers(ID_3, split3) ||
+            ensureMappers(ID_1, split2) && ensureMappers(ID_2, split3) && ensureMappers(ID_3, split1) ||
+            ensureMappers(ID_1, split3) && ensureMappers(ID_2, split1) && ensureMappers(ID_3, split2) ||
+            ensureMappers(ID_1, split3) && ensureMappers(ID_2, split2) && ensureMappers(ID_3, split1);
+        assert ensureReducers(ID_1, 1) && ensureReducers(ID_2, 2) && ensureReducers(ID_3, 2) ||
+            ensureReducers(ID_1, 2) && ensureReducers(ID_2, 1) && ensureReducers(ID_3, 2) ||
+            ensureReducers(ID_1, 2) && ensureReducers(ID_2, 2) && ensureReducers(ID_3, 1);
+    }
+
+    /**
+     * Create plan.
+     *
+     * @param reducers Reducers count.
+     * @param splits Splits.
+     * @return Plan.
+     * @throws IgniteCheckedException If failed.
+     */
+    private static HadoopMapReducePlan plan(int reducers, HadoopInputSplit... splits) throws IgniteCheckedException {
+        assert reducers > 0;
+        assert splits != null && splits.length > 0;
+
+        Collection<HadoopInputSplit> splitList = new ArrayList<>(splits.length);
+
+        Collections.addAll(splitList, splits);
+
+        Collection<ClusterNode> top = new ArrayList<>();
+
+        GridTestNode node1 = new GridTestNode(ID_1);
+        GridTestNode node2 = new GridTestNode(ID_2);
+        GridTestNode node3 = new GridTestNode(ID_3);
+
+        node1.setHostName(HOST_1);
+        node2.setHostName(HOST_2);
+        node3.setHostName(HOST_3);
+
+        top.add(node1);
+        top.add(node2);
+        top.add(node3);
+
+        HadoopMapReducePlan plan = PLANNER.preparePlan(new MockJob(reducers, splitList), top, null);
+
+        PLAN.set(plan);
+
+        return plan;
+    }
+
+    /**
+     * Ensure that node contains the given mappers.
+     *
+     * @param nodeId Node ID.
+     * @param expSplits Expected splits.
+     * @return {@code True} if this assumption is valid.
+     */
+    private static boolean ensureMappers(UUID nodeId, HadoopInputSplit... expSplits) {
+        Collection<HadoopInputSplit> expSplitsCol = new ArrayList<>();
+
+        Collections.addAll(expSplitsCol, expSplits);
+
+        Collection<HadoopInputSplit> splits = PLAN.get().mappers(nodeId);
+
+        return F.eq(expSplitsCol, splits);
+    }
+
+    /**
+     * Ensure that node contains the given amount of reducers.
+     *
+     * @param nodeId Node ID.
+     * @param reducers Reducers.
+     * @return {@code True} if this assumption is valid.
+     */
+    private static boolean ensureReducers(UUID nodeId, int reducers) {
+        int[] reducersArr = PLAN.get().reducers(nodeId);
+
+        return reducers == 0 ? F.isEmpty(reducersArr) : (reducersArr != null && reducersArr.length == reducers);
+    }
+
+    /**
+     * Ensure that no mappers and reducers is located on this node.
+     *
+     * @param nodeId Node ID.
+     * @return {@code True} if this assumption is valid.
+     */
+    private static boolean ensureEmpty(UUID nodeId) {
+        return F.isEmpty(PLAN.get().mappers(nodeId)) && F.isEmpty(PLAN.get().reducers(nodeId));
+    }
+
+    /**
+     * Create split.
+     *
+     * @param igfs IGFS flag.
+     * @param file File.
+     * @param start Start.
+     * @param len Length.
+     * @param hosts Hosts.
+     * @return Split.
+     */
+    private static HadoopFileBlock split(boolean igfs, String file, long start, long len, String... hosts) {
+        URI uri = URI.create((igfs ? "igfs://igfs@" : "hdfs://") + file);
+
+        return new HadoopFileBlock(hosts, uri, start, len);
+    }
+
+    /**
+     * Create block location.
+     *
+     * @param start Start.
+     * @param len Length.
+     * @param nodeIds Node IDs.
+     * @return Block location.
+     */
+    private static IgfsBlockLocation location(long start, long len, UUID... nodeIds) {
+        assert nodeIds != null && nodeIds.length > 0;
+
+        Collection<ClusterNode> nodes = new ArrayList<>(nodeIds.length);
+
+        for (UUID id : nodeIds)
+            nodes.add(new GridTestNode(id));
+
+        return new IgfsBlockLocationImpl(start, len, nodes);
+    }
+
+    /**
+     * Map IGFS block to nodes.
+     *
+     * @param file File.
+     * @param start Start.
+     * @param len Length.
+     * @param locations Locations.
+     */
+    private static void mapIgfsBlock(URI file, long start, long len, IgfsBlockLocation... locations) {
+        assert locations != null && locations.length > 0;
+
+        IgfsPath path = new IgfsPath(file);
+
+        Block block = new Block(path, start, len);
+
+        Collection<IgfsBlockLocation> locationsList = new ArrayList<>();
+
+        Collections.addAll(locationsList, locations);
+
+        BLOCK_MAP.put(block, locationsList);
+    }
+
+    /**
+     * Block.
+     */
+    private static class Block {
+        /** */
+        private final IgfsPath path;
+
+        /** */
+        private final long start;
+
+        /** */
+        private final long len;
+
+        /**
+         * Constructor.
+         *
+         * @param path Path.
+         * @param start Start.
+         * @param len Length.
+         */
+        private Block(IgfsPath path, long start, long len) {
+            this.path = path;
+            this.start = start;
+            this.len = len;
+        }
+
+        /** {@inheritDoc} */
+        @SuppressWarnings("RedundantIfStatement")
+        @Override public boolean equals(Object o) {
+            if (this == o) return true;
+            if (!(o instanceof Block)) return false;
+
+            Block block = (Block) o;
+
+            if (len != block.len)
+                return false;
+
+            if (start != block.start)
+                return false;
+
+            if (!path.equals(block.path))
+                return false;
+
+            return true;
+        }
+
+        /** {@inheritDoc} */
+        @Override public int hashCode() {
+            int res = path.hashCode();
+
+            res = 31 * res + (int) (start ^ (start >>> 32));
+            res = 31 * res + (int) (len ^ (len >>> 32));
+
+            return res;
+        }
+    }
+
+    /**
+     * Mocked job.
+     */
+    private static class MockJob implements HadoopJob {
+        /** Reducers count. */
+        private final int reducers;
+
+        /** */
+        private Collection<HadoopInputSplit> splitList;
+
+        /**
+         * Constructor.
+         *
+         * @param reducers Reducers count.
+         * @param splitList Splits.
+         */
+        private MockJob(int reducers, Collection<HadoopInputSplit> splitList) {
+            this.reducers = reducers;
+            this.splitList = splitList;
+        }
+
+        /** {@inheritDoc} */
+        @Override public HadoopJobId id() {
+            return null;
+        }
+
+        /** {@inheritDoc} */
+        @Override public HadoopJobInfo info() {
+            return new HadoopDefaultJobInfo() {
+                @Override public int reducers() {
+                    return reducers;
+                }
+            };
+        }
+
+        /** {@inheritDoc} */
+        @Override public Collection<HadoopInputSplit> input() throws IgniteCheckedException {
+            return splitList;
+        }
+
+        /** {@inheritDoc} */
+        @Override public HadoopTaskContext getTaskContext(HadoopTaskInfo info) throws IgniteCheckedException {
+            return null;
+        }
+
+        /** {@inheritDoc} */
+        @Override public void initialize(boolean external, UUID nodeId) throws IgniteCheckedException {
+            // No-op.
+        }
+
+        /** {@inheritDoc} */
+        @Override public void dispose(boolean external) throws IgniteCheckedException {
+            // No-op.
+        }
+
+        /** {@inheritDoc} */
+        @Override public void prepareTaskEnvironment(HadoopTaskInfo info) throws IgniteCheckedException {
+            // No-op.
+        }
+
+        /** {@inheritDoc} */
+        @Override public void cleanupTaskEnvironment(HadoopTaskInfo info) throws IgniteCheckedException {
+            // No-op.
+        }
+
+        /** {@inheritDoc} */
+        @Override public void cleanupStagingDirectory() {
+            // No-op.
+        }
+    }
+
+    /**
+     * Mocked IGFS.
+     */
+    private static class MockIgfs implements IgfsEx {
+        /** {@inheritDoc} */
+        @Override public boolean isProxy(URI path) {
+            return PROXY_MAP.containsKey(path) && PROXY_MAP.get(path);
+        }
+
+        /** {@inheritDoc} */
+        @Override public Collection<IgfsBlockLocation> affinity(IgfsPath path, long start, long len) {
+            return BLOCK_MAP.get(new Block(path, start, len));
+        }
+
+        /** {@inheritDoc} */
+        @Override public Collection<IgfsBlockLocation> affinity(IgfsPath path, long start, long len,
+            long maxLen) {
+            return null;
+        }
+
+        /** {@inheritDoc} */
+        @Override public void stop() {
+            // No-op.
+        }
+
+        /** {@inheritDoc} */
+        @Override public IgfsContext context() {
+            return null;
+        }
+
+        /** {@inheritDoc} */
+        @Override public IgfsPaths proxyPaths() {
+            return null;
+        }
+
+        /** {@inheritDoc} */
+        @Override public IgfsInputStreamAdapter open(IgfsPath path, int bufSize, int seqReadsBeforePrefetch) {
+            return null;
+        }
+
+        /** {@inheritDoc} */
+        @Override public IgfsInputStreamAdapter open(IgfsPath path) {
+            return null;
+        }
+
+        /** {@inheritDoc} */
+        @Override public IgfsInputStreamAdapter open(IgfsPath path, int bufSize) {
+            return null;
+        }
+
+        /** {@inheritDoc} */
+        @Override public IgfsStatus globalSpace() throws IgniteCheckedException {
+            return null;
+        }
+
+        /** {@inheritDoc} */
+        @Override public void globalSampling(@Nullable Boolean val) throws IgniteCheckedException {
+            // No-op.
+        }
+
+        /** {@inheritDoc} */
+        @Nullable @Override public Boolean globalSampling() {
+            return null;
+        }
+
+        /** {@inheritDoc} */
+        @Override public IgfsLocalMetrics localMetrics() {
+            return null;
+        }
+
+        /** {@inheritDoc} */
+        @Override public long groupBlockSize() {
+            return 0;
+        }
+
+        /** {@inheritDoc} */
+        @Override public IgniteInternalFuture<?> awaitDeletesAsync() throws IgniteCheckedException {
+            return null;
+        }
+
+        /** {@inheritDoc} */
+        @Nullable @Override public String clientLogDirectory() {
+            return null;
+        }
+
+        /** {@inheritDoc} */
+        @Override public void clientLogDirectory(String logDir) {
+            // No-op.
+        }
+
+        /** {@inheritDoc} */
+        @Override public boolean evictExclude(IgfsPath path, boolean primary) {
+            return false;
+        }
+
+        /** {@inheritDoc} */
+        @Nullable @Override public String name() {
+            return null;
+        }
+
+        /** {@inheritDoc} */
+        @Override public FileSystemConfiguration configuration() {
+            return null;
+        }
+
+        /** {@inheritDoc} */
+        @Override public boolean exists(IgfsPath path) {
+            return false;
+        }
+
+        /** {@inheritDoc} */
+        @Nullable @Override public IgfsFile info(IgfsPath path) {
+            return null;
+        }
+
+        /** {@inheritDoc} */
+        @Override public IgfsPathSummary summary(IgfsPath path) {
+            return null;
+        }
+
+        /** {@inheritDoc} */
+        @Nullable @Override public IgfsFile update(IgfsPath path, Map<String, String> props) {
+            return null;
+        }
+
+        /** {@inheritDoc} */
+        @Override public void rename(IgfsPath src, IgfsPath dest) {
+            // No-op.
+        }
+
+        /** {@inheritDoc} */
+        @Override public boolean delete(IgfsPath path, boolean recursive) {
+            return false;
+        }
+
+        /** {@inheritDoc} */
+        @Override public void mkdirs(IgfsPath path) {
+            // No-op.
+        }
+
+        /** {@inheritDoc} */
+        @Override public void mkdirs(IgfsPath path, @Nullable Map<String, String> props) {
+            // No-op.
+        }
+
+        /** {@inheritDoc} */
+        @Override public Collection<IgfsPath> listPaths(IgfsPath path) {
+            return null;
+        }
+
+        /** {@inheritDoc} */
+        @Override public Collection<IgfsFile> listFiles(IgfsPath path) {
+            return null;
+        }
+
+        /** {@inheritDoc} */
+        @Override public long usedSpaceSize() {
+            return 0;
+        }
+
+        /** {@inheritDoc} */
+        @Override public IgfsOutputStream create(IgfsPath path, boolean overwrite) {
+            return null;
+        }
+
+        /** {@inheritDoc} */
+        @Override public IgfsOutputStream create(IgfsPath path, int bufSize, boolean overwrite, int replication,
+            long blockSize, @Nullable Map<String, String> props) {
+            return null;
+        }
+
+        /** {@inheritDoc} */
+        @Override public IgfsOutputStream create(IgfsPath path, int bufSize, boolean overwrite,
+            @Nullable IgniteUuid affKey, int replication, long blockSize, @Nullable Map<String, String> props) {
+            return null;
+        }
+
+        /** {@inheritDoc} */
+        @Override public IgfsOutputStream append(IgfsPath path, boolean create) {
+            return null;
+        }
+
+        /** {@inheritDoc} */
+        @Override public IgfsOutputStream append(IgfsPath path, int bufSize, boolean create,
+            @Nullable Map<String, String> props) {
+            return null;
+        }
+
+        /** {@inheritDoc} */
+        @Override public void setTimes(IgfsPath path, long accessTime, long modificationTime) {
+            // No-op.
+        }
+
+        /** {@inheritDoc} */
+        @Override public IgfsMetrics metrics() {
+            return null;
+        }
+
+        /** {@inheritDoc} */
+        @Override public void resetMetrics() {
+            // No-op.
+        }
+
+        /** {@inheritDoc} */
+        @Override public long size(IgfsPath path) {
+            return 0;
+        }
+
+        /** {@inheritDoc} */
+        @Override public void format() {
+            // No-op.
+        }
+
+        /** {@inheritDoc} */
+        @Override public <T, R> R execute(IgfsTask<T, R> task, @Nullable IgfsRecordResolver rslvr,
+            Collection<IgfsPath> paths, @Nullable T arg) {
+            return null;
+        }
+
+        /** {@inheritDoc} */
+        @Override public <T, R> R execute(IgfsTask<T, R> task, @Nullable IgfsRecordResolver rslvr,
+            Collection<IgfsPath> paths, boolean skipNonExistentFiles, long maxRangeLen, @Nullable T arg) {
+            return null;
+        }
+
+        /** {@inheritDoc} */
+        @Override public <T, R> R execute(Class<? extends IgfsTask<T, R>> taskCls,
+            @Nullable IgfsRecordResolver rslvr, Collection<IgfsPath> paths, @Nullable T arg) {
+            return null;
+        }
+
+        /** {@inheritDoc} */
+        @Override public <T, R> R execute(Class<? extends IgfsTask<T, R>> taskCls,
+            @Nullable IgfsRecordResolver rslvr, Collection<IgfsPath> paths, boolean skipNonExistentFiles,
+            long maxRangeLen, @Nullable T arg) {
+            return null;
+        }
+
+        /** {@inheritDoc} */
+        @Override public IgniteUuid nextAffinityKey() {
+            return null;
+        }
+
+        /** {@inheritDoc} */
+        @Override public IgniteFileSystem withAsync() {
+            return null;
+        }
+
+        /** {@inheritDoc} */
+        @Override public boolean isAsync() {
+            return false;
+        }
+
+        /** {@inheritDoc} */
+        @Override public <R> IgniteFuture<R> future() {
+            return null;
+        }
+
+        /** {@inheritDoc} */
+        @Override public IgfsSecondaryFileSystem asSecondary() {
+            return null;
+        }
+    }
+
+    /**
+     * Mocked Grid.
+     */
+    @SuppressWarnings("ExternalizableWithoutPublicNoArgConstructor")
+    private static class MockIgnite extends IgniteSpringBean implements IgniteEx {
+        /** {@inheritDoc} */
+        @Override public IgniteClusterEx cluster() {
+            return (IgniteClusterEx)super.cluster();
+        }
+
+        /** {@inheritDoc} */
+        @Override public IgniteFileSystem igfsx(String name) {
+            assert F.eq("igfs", name);
+
+            return IGFS;
+        }
+
+        /** {@inheritDoc} */
+        @Override public Hadoop hadoop() {
+            return null;
+        }
+
+        /** {@inheritDoc} */
+        @Override public String name() {
+            return null;
+        }
+
+        /** {@inheritDoc} */
+        @Override public <K extends GridCacheUtilityKey, V> GridCacheProjectionEx<K, V> utilityCache(Class<K> keyCls,
+            Class<V> valCls) {
+            return null;
+        }
+
+        /** {@inheritDoc} */
+        @Nullable @Override public <K, V> GridCache<K, V> cachex(@Nullable String name) {
+            return null;
+        }
+
+        /** {@inheritDoc} */
+        @Nullable @Override public <K, V> GridCache<K, V> cachex() {
+            return null;
+        }
+
+        /** {@inheritDoc} */
+        @SuppressWarnings("unchecked")
+        @Override public Collection<GridCache<?, ?>> cachesx(@Nullable IgnitePredicate<? super GridCache<?, ?>>... p) {
+            return null;
+        }
+
+        /** {@inheritDoc} */
+        @Override public boolean eventUserRecordable(int type) {
+            return false;
+        }
+
+        /** {@inheritDoc} */
+        @Override public boolean allEventsUserRecordable(int[] types) {
+            return false;
+        }
+
+        /** {@inheritDoc} */
+        @Override public Collection<String> compatibleVersions() {
+            return null;
+        }
+
+        /** {@inheritDoc} */
+        @Override public boolean isJmxRemoteEnabled() {
+            return false;
+        }
+
+        /** {@inheritDoc} */
+        @Override public boolean isRestartEnabled() {
+            return false;
+        }
+
+        /** {@inheritDoc} */
+        @Override public ClusterNode localNode() {
+            return null;
+        }
+
+        /** {@inheritDoc} */
+        @Override public String latestVersion() {
+            return null;
+        }
+    }
+}

http://git-wip-us.apache.org/repos/asf/incubator-ignite/blob/498dcfab/modules/hadoop/src/test/java/org/apache/ignite/internal/processors/hadoop/HadoopFileSystemsTest.java
----------------------------------------------------------------------
diff --git a/modules/hadoop/src/test/java/org/apache/ignite/internal/processors/hadoop/HadoopFileSystemsTest.java b/modules/hadoop/src/test/java/org/apache/ignite/internal/processors/hadoop/HadoopFileSystemsTest.java
new file mode 100644
index 0000000..8cf31a2
--- /dev/null
+++ b/modules/hadoop/src/test/java/org/apache/ignite/internal/processors/hadoop/HadoopFileSystemsTest.java
@@ -0,0 +1,177 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.ignite.internal.processors.hadoop;
+
+import org.apache.hadoop.conf.*;
+import org.apache.hadoop.fs.FileSystem;
+import org.apache.hadoop.fs.*;
+import org.apache.hadoop.mapreduce.*;
+import org.apache.ignite.internal.processors.hadoop.fs.*;
+import org.apache.ignite.testframework.*;
+
+import java.io.*;
+import java.net.*;
+import java.util.concurrent.*;
+import java.util.concurrent.atomic.*;
+
+/**
+ * Test file systems for the working directory multi-threading support.
+ */
+public class HadoopFileSystemsTest extends HadoopAbstractSelfTest {
+    private static final int THREAD_COUNT = 3;
+
+    /** {@inheritDoc} */
+    @Override protected void beforeTest() throws Exception {
+        startGrids(gridCount());
+    }
+
+    /** {@inheritDoc} */
+    @Override protected void afterTest() throws Exception {
+        stopAllGrids(true);
+    }
+
+    /** {@inheritDoc} */
+    @Override protected boolean igfsEnabled() {
+        return true;
+    }
+
+    /** {@inheritDoc} */
+    @Override protected int gridCount() {
+        return 1;
+    }
+
+
+    /**
+     * Test the file system with specified URI for the multi-thread working directory support.
+     *
+     * @param uri Base URI of the file system (scheme and authority).
+     * @throws Exception If fails.
+     */
+    private void testFileSystem(final URI uri) throws Exception {
+        final Configuration cfg = new Configuration();
+
+        setupFileSystems(cfg);
+
+        cfg.set(HadoopFileSystemsUtils.LOC_FS_WORK_DIR_PROP,
+            new Path(new Path(uri), "user/" + System.getProperty("user.name")).toString());
+
+        final CountDownLatch changeUserPhase = new CountDownLatch(THREAD_COUNT);
+        final CountDownLatch changeDirPhase = new CountDownLatch(THREAD_COUNT);
+        final CountDownLatch changeAbsDirPhase = new CountDownLatch(THREAD_COUNT);
+        final CountDownLatch finishPhase = new CountDownLatch(THREAD_COUNT);
+
+        final Path[] newUserInitWorkDir = new Path[THREAD_COUNT];
+        final Path[] newWorkDir = new Path[THREAD_COUNT];
+        final Path[] newAbsWorkDir = new Path[THREAD_COUNT];
+        final Path[] newInstanceWorkDir = new Path[THREAD_COUNT];
+
+        final AtomicInteger threadNum = new AtomicInteger(0);
+
+        GridTestUtils.runMultiThreadedAsync(new Runnable() {
+            @Override public void run() {
+                try {
+                    int curThreadNum = threadNum.getAndIncrement();
+
+                    FileSystem fs = FileSystem.get(uri, cfg);
+
+                    HadoopFileSystemsUtils.setUser(fs, "user" + curThreadNum);
+
+                    if ("file".equals(uri.getScheme()))
+                        FileSystem.get(uri, cfg).setWorkingDirectory(new Path("file:///user/user" + curThreadNum));
+
+                    changeUserPhase.countDown();
+                    changeUserPhase.await();
+
+                    newUserInitWorkDir[curThreadNum] = FileSystem.get(uri, cfg).getWorkingDirectory();
+
+                    FileSystem.get(uri, cfg).setWorkingDirectory(new Path("folder" + curThreadNum));
+
+                    changeDirPhase.countDown();
+                    changeDirPhase.await();
+
+                    newWorkDir[curThreadNum] = FileSystem.get(uri, cfg).getWorkingDirectory();
+
+                    FileSystem.get(uri, cfg).setWorkingDirectory(new Path("/folder" + curThreadNum));
+
+                    changeAbsDirPhase.countDown();
+                    changeAbsDirPhase.await();
+
+                    newAbsWorkDir[curThreadNum] = FileSystem.get(uri, cfg).getWorkingDirectory();
+
+                    newInstanceWorkDir[curThreadNum] = FileSystem.newInstance(uri, cfg).getWorkingDirectory();
+
+                    finishPhase.countDown();
+                }
+                catch (InterruptedException | IOException e) {
+                    error("Failed to execute test thread.", e);
+
+                    fail();
+                }
+            }
+        }, THREAD_COUNT, "filesystems-test");
+
+        finishPhase.await();
+
+        for (int i = 0; i < THREAD_COUNT; i ++) {
+            cfg.set(MRJobConfig.USER_NAME, "user" + i);
+
+            Path workDir = new Path(new Path(uri), "user/user" + i);
+
+            cfg.set(HadoopFileSystemsUtils.LOC_FS_WORK_DIR_PROP, workDir.toString());
+
+            assertEquals(workDir, FileSystem.newInstance(uri, cfg).getWorkingDirectory());
+
+            assertEquals(workDir, newUserInitWorkDir[i]);
+
+            assertEquals(new Path(new Path(uri), "user/user" + i + "/folder" + i), newWorkDir[i]);
+
+            assertEquals(new Path("/folder" + i), newAbsWorkDir[i]);
+
+            assertEquals(new Path(new Path(uri), "user/" + System.getProperty("user.name")), newInstanceWorkDir[i]);
+        }
+
+        System.out.println(System.getProperty("user.dir"));
+    }
+
+    /**
+     * Test IGFS multi-thread working directory.
+     *
+     * @throws Exception If fails.
+     */
+    public void testIgfs() throws Exception {
+        testFileSystem(URI.create(igfsScheme()));
+    }
+
+    /**
+     * Test HDFS multi-thread working directory.
+     *
+     * @throws Exception If fails.
+     */
+    public void testHdfs() throws Exception {
+        testFileSystem(URI.create("hdfs://localhost/"));
+    }
+
+    /**
+     * Test LocalFS multi-thread working directory.
+     *
+     * @throws Exception If fails.
+     */
+    public void testLocal() throws Exception {
+        testFileSystem(URI.create("file:///"));
+    }
+}

http://git-wip-us.apache.org/repos/asf/incubator-ignite/blob/498dcfab/modules/hadoop/src/test/java/org/apache/ignite/internal/processors/hadoop/HadoopGroupingTest.java
----------------------------------------------------------------------
diff --git a/modules/hadoop/src/test/java/org/apache/ignite/internal/processors/hadoop/HadoopGroupingTest.java b/modules/hadoop/src/test/java/org/apache/ignite/internal/processors/hadoop/HadoopGroupingTest.java
new file mode 100644
index 0000000..e385ca7
--- /dev/null
+++ b/modules/hadoop/src/test/java/org/apache/ignite/internal/processors/hadoop/HadoopGroupingTest.java
@@ -0,0 +1,287 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.ignite.internal.processors.hadoop;
+
+import org.apache.hadoop.io.*;
+import org.apache.hadoop.mapreduce.*;
+import org.apache.ignite.configuration.*;
+import org.apache.ignite.internal.util.*;
+import org.apache.ignite.internal.util.typedef.*;
+import org.apache.ignite.internal.util.typedef.internal.*;
+
+import java.io.*;
+import java.util.*;
+
+import static org.apache.ignite.internal.processors.hadoop.HadoopUtils.*;
+
+/**
+ * Grouping test.
+ */
+public class HadoopGroupingTest extends HadoopAbstractSelfTest {
+    /** */
+    private static final String PATH_OUTPUT = "/test-out";
+
+    /** */
+    private static final GridConcurrentHashSet<UUID> vals = HadoopSharedMap.map(HadoopGroupingTest.class)
+        .put("vals", new GridConcurrentHashSet<UUID>());
+
+    /** {@inheritDoc} */
+    @Override protected int gridCount() {
+        return 3;
+    }
+
+    /** {@inheritDoc} */
+    protected boolean igfsEnabled() {
+        return false;
+    }
+
+    /** {@inheritDoc} */
+    @Override protected void beforeTest() throws Exception {
+        startGrids(gridCount());
+    }
+
+    /** {@inheritDoc} */
+    @Override protected void afterTest() throws Exception {
+        stopAllGrids(true);
+    }
+
+    /** {@inheritDoc} */
+    @Override public HadoopConfiguration hadoopConfiguration(String gridName) {
+        HadoopConfiguration cfg = super.hadoopConfiguration(gridName);
+
+        cfg.setExternalExecution(false);
+
+        return cfg;
+    }
+
+    /**
+     * @throws Exception If failed.
+     */
+    public void testGroupingReducer() throws Exception {
+        doTestGrouping(false);
+    }
+
+    /**
+     * @throws Exception If failed.
+     */
+    public void testGroupingCombiner() throws Exception {
+        doTestGrouping(true);
+    }
+
+    /**
+     * @param combiner With combiner.
+     * @throws Exception If failed.
+     */
+    public void doTestGrouping(boolean combiner) throws Exception {
+        vals.clear();
+
+        Job job = Job.getInstance();
+
+        job.setInputFormatClass(InFormat.class);
+        job.setOutputFormatClass(OutFormat.class);
+
+        job.setOutputKeyClass(YearTemperature.class);
+        job.setOutputValueClass(Text.class);
+
+        job.setMapperClass(Mapper.class);
+
+        if (combiner) {
+            job.setCombinerClass(MyReducer.class);
+            job.setNumReduceTasks(0);
+            job.setCombinerKeyGroupingComparatorClass(YearComparator.class);
+        }
+        else {
+            job.setReducerClass(MyReducer.class);
+            job.setNumReduceTasks(4);
+            job.setGroupingComparatorClass(YearComparator.class);
+        }
+
+        grid(0).hadoop().submit(new HadoopJobId(UUID.randomUUID(), 2),
+            createJobInfo(job.getConfiguration())).get(30000);
+
+        assertTrue(vals.isEmpty());
+    }
+
+    public static class MyReducer extends Reducer<YearTemperature, Text, Text, Object> {
+        /** */
+        int lastYear;
+
+        @Override protected void reduce(YearTemperature key, Iterable<Text> vals0, Context context)
+            throws IOException, InterruptedException {
+            X.println("___ : " + context.getTaskAttemptID() + " --> " + key);
+
+            Set<UUID> ids = new HashSet<>();
+
+            for (Text val : vals0)
+                assertTrue(ids.add(UUID.fromString(val.toString())));
+
+            for (Text val : vals0)
+                assertTrue(ids.remove(UUID.fromString(val.toString())));
+
+            assertTrue(ids.isEmpty());
+
+            assertTrue(key.year > lastYear);
+
+            lastYear = key.year;
+
+            for (Text val : vals0)
+                assertTrue(vals.remove(UUID.fromString(val.toString())));
+        }
+    }
+
+    public static class YearComparator implements RawComparator<YearTemperature> { // Grouping comparator.
+        /** {@inheritDoc} */
+        @Override public int compare(YearTemperature o1, YearTemperature o2) {
+            return Integer.compare(o1.year, o2.year);
+        }
+
+        /** {@inheritDoc} */
+        @Override public int compare(byte[] b1, int s1, int l1, byte[] b2, int s2, int l2) {
+            throw new IllegalStateException();
+        }
+    }
+
+    public static class YearTemperature implements WritableComparable<YearTemperature>, Cloneable {
+        /** */
+        private int year;
+
+        /** */
+        private int temperature;
+
+        /** {@inheritDoc} */
+        @Override public void write(DataOutput out) throws IOException {
+            out.writeInt(year);
+            out.writeInt(temperature);
+        }
+
+        /** {@inheritDoc} */
+        @Override public void readFields(DataInput in) throws IOException {
+            year = in.readInt();
+            temperature = in.readInt();
+        }
+
+        /** {@inheritDoc} */
+        @Override public boolean equals(Object o) {
+            throw new IllegalStateException();
+        }
+
+        /** {@inheritDoc} */
+        @Override public int hashCode() { // To be partitioned by year.
+            return year;
+        }
+
+        /** {@inheritDoc} */
+        @Override public int compareTo(YearTemperature o) {
+            int res = Integer.compare(year, o.year);
+
+            if (res != 0)
+                return res;
+
+            // Sort comparator by year and temperature, to find max for year.
+            return Integer.compare(o.temperature, temperature);
+        }
+
+        /** {@inheritDoc} */
+        @Override public String toString() {
+            return S.toString(YearTemperature.class, this);
+        }
+    }
+
+    public static class InFormat extends InputFormat<YearTemperature, Text> {
+        /** {@inheritDoc} */
+        @Override public List<InputSplit> getSplits(JobContext context) throws IOException, InterruptedException {
+            ArrayList<InputSplit> list = new ArrayList<>();
+
+            for (int i = 0; i < 10; i++)
+                list.add(new HadoopSortingTest.FakeSplit(20));
+
+            return list;
+        }
+
+        /** {@inheritDoc} */
+        @Override public RecordReader<YearTemperature, Text> createRecordReader(final InputSplit split,
+            TaskAttemptContext context) throws IOException, InterruptedException {
+            return new RecordReader<YearTemperature, Text>() {
+                /** */
+                int cnt;
+
+                /** */
+                Random rnd = new GridRandom();
+
+                /** */
+                YearTemperature key = new YearTemperature();
+
+                /** */
+                Text val = new Text();
+
+                @Override public void initialize(InputSplit split, TaskAttemptContext context) {
+                    // No-op.
+                }
+
+                @Override public boolean nextKeyValue() throws IOException, InterruptedException {
+                    return cnt++ < split.getLength();
+                }
+
+                @Override public YearTemperature getCurrentKey() {
+                    key.year = 1990 + rnd.nextInt(10);
+                    key.temperature = 10 + rnd.nextInt(20);
+
+                    return key;
+                }
+
+                @Override public Text getCurrentValue() {
+                    UUID id = UUID.randomUUID();
+
+                    assertTrue(vals.add(id));
+
+                    val.set(id.toString());
+
+                    return val;
+                }
+
+                @Override public float getProgress() {
+                    return 0;
+                }
+
+                @Override public void close() {
+                    // No-op.
+                }
+            };
+        }
+    }
+
+    /**
+     *
+     */
+    public static class OutFormat extends OutputFormat {
+        /** {@inheritDoc} */
+        @Override public RecordWriter getRecordWriter(TaskAttemptContext context) throws IOException, InterruptedException {
+            return null;
+        }
+
+        /** {@inheritDoc} */
+        @Override public void checkOutputSpecs(JobContext context) throws IOException, InterruptedException {
+            // No-op.
+        }
+
+        /** {@inheritDoc} */
+        @Override public OutputCommitter getOutputCommitter(TaskAttemptContext context) throws IOException, InterruptedException {
+            return null;
+        }
+    }
+}

http://git-wip-us.apache.org/repos/asf/incubator-ignite/blob/498dcfab/modules/hadoop/src/test/java/org/apache/ignite/internal/processors/hadoop/HadoopJobTrackerSelfTest.java
----------------------------------------------------------------------
diff --git a/modules/hadoop/src/test/java/org/apache/ignite/internal/processors/hadoop/HadoopJobTrackerSelfTest.java b/modules/hadoop/src/test/java/org/apache/ignite/internal/processors/hadoop/HadoopJobTrackerSelfTest.java
new file mode 100644
index 0000000..943d89f
--- /dev/null
+++ b/modules/hadoop/src/test/java/org/apache/ignite/internal/processors/hadoop/HadoopJobTrackerSelfTest.java
@@ -0,0 +1,331 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.ignite.internal.processors.hadoop;
+
+import org.apache.hadoop.fs.*;
+import org.apache.hadoop.mapreduce.*;
+import org.apache.hadoop.mapreduce.lib.input.*;
+import org.apache.hadoop.mapreduce.lib.output.*;
+import org.apache.ignite.configuration.*;
+import org.apache.ignite.internal.*;
+import org.apache.ignite.internal.util.typedef.internal.*;
+
+import java.io.*;
+import java.net.*;
+import java.util.*;
+import java.util.concurrent.*;
+import java.util.concurrent.atomic.*;
+
+import static org.apache.ignite.internal.processors.hadoop.HadoopUtils.*;
+
+/**
+ * Job tracker self test.
+ */
+public class HadoopJobTrackerSelfTest extends HadoopAbstractSelfTest {
+    /** */
+    private static final String PATH_OUTPUT = "/test-out";
+
+    /** Test block count parameter name. */
+    private static final int BLOCK_CNT = 10;
+
+    /** */
+    private static HadoopSharedMap m = HadoopSharedMap.map(HadoopJobTrackerSelfTest.class);
+
+    /** Map task execution count. */
+    private static final AtomicInteger mapExecCnt = m.put("mapExecCnt", new AtomicInteger());
+
+    /** Reduce task execution count. */
+    private static final AtomicInteger reduceExecCnt = m.put("reduceExecCnt", new AtomicInteger());
+
+    /** Reduce task execution count. */
+    private static final AtomicInteger combineExecCnt = m.put("combineExecCnt", new AtomicInteger());
+
+    /** */
+    private static final Map<String, CountDownLatch> latch = m.put("latch", new HashMap<String, CountDownLatch>());
+
+    /** {@inheritDoc} */
+    @Override protected boolean igfsEnabled() {
+        return true;
+    }
+
+    /** {@inheritDoc} */
+    @Override protected void beforeTestsStarted() throws Exception {
+        super.beforeTestsStarted();
+
+        startGrids(gridCount());
+    }
+
+    /** {@inheritDoc} */
+    @Override protected void afterTestsStopped() throws Exception {
+        stopAllGrids();
+
+        super.afterTestsStopped();
+    }
+
+    /** {@inheritDoc} */
+    @Override protected void beforeTest() throws Exception {
+        latch.put("mapAwaitLatch", new CountDownLatch(1));
+        latch.put("reduceAwaitLatch", new CountDownLatch(1));
+        latch.put("combineAwaitLatch", new CountDownLatch(1));
+    }
+
+    /** {@inheritDoc} */
+    @Override protected void afterTest() throws Exception {
+        mapExecCnt.set(0);
+        combineExecCnt.set(0);
+        reduceExecCnt.set(0);
+    }
+
+    /** {@inheritDoc} */
+    @Override public HadoopConfiguration hadoopConfiguration(String gridName) {
+        HadoopConfiguration cfg = super.hadoopConfiguration(gridName);
+
+        cfg.setMapReducePlanner(new HadoopTestRoundRobinMrPlanner());
+        cfg.setExternalExecution(false);
+
+        return cfg;
+    }
+
+    /**
+     * @throws Exception If failed.
+     */
+    public void testSimpleTaskSubmit() throws Exception {
+        try {
+            UUID globalId = UUID.randomUUID();
+
+            Job job = Job.getInstance();
+            setupFileSystems(job.getConfiguration());
+
+            job.setMapperClass(TestMapper.class);
+            job.setReducerClass(TestReducer.class);
+            job.setInputFormatClass(InFormat.class);
+
+            FileOutputFormat.setOutputPath(job, new Path(igfsScheme() + PATH_OUTPUT + "1"));
+
+            HadoopJobId jobId = new HadoopJobId(globalId, 1);
+
+            grid(0).hadoop().submit(jobId, createJobInfo(job.getConfiguration()));
+
+            checkStatus(jobId, false);
+
+            info("Releasing map latch.");
+
+            latch.get("mapAwaitLatch").countDown();
+
+            checkStatus(jobId, false);
+
+            info("Releasing reduce latch.");
+
+            latch.get("reduceAwaitLatch").countDown();
+
+            checkStatus(jobId, true);
+
+            assertEquals(10, mapExecCnt.get());
+            assertEquals(0, combineExecCnt.get());
+            assertEquals(1, reduceExecCnt.get());
+        }
+        finally {
+            // Safety.
+            latch.get("mapAwaitLatch").countDown();
+            latch.get("combineAwaitLatch").countDown();
+            latch.get("reduceAwaitLatch").countDown();
+        }
+    }
+
+    /**
+     * @throws Exception If failed.
+     */
+    public void testTaskWithCombinerPerMap() throws Exception {
+        try {
+            UUID globalId = UUID.randomUUID();
+
+            Job job = Job.getInstance();
+            setupFileSystems(job.getConfiguration());
+
+            job.setMapperClass(TestMapper.class);
+            job.setReducerClass(TestReducer.class);
+            job.setCombinerClass(TestCombiner.class);
+            job.setInputFormatClass(InFormat.class);
+
+            FileOutputFormat.setOutputPath(job, new Path(igfsScheme() + PATH_OUTPUT + "2"));
+
+            HadoopJobId jobId = new HadoopJobId(globalId, 1);
+
+            grid(0).hadoop().submit(jobId, createJobInfo(job.getConfiguration()));
+
+            checkStatus(jobId, false);
+
+            info("Releasing map latch.");
+
+            latch.get("mapAwaitLatch").countDown();
+
+            checkStatus(jobId, false);
+
+            // All maps are completed. We have a combiner, so no reducers should be executed
+            // before combiner latch is released.
+
+            U.sleep(50);
+
+            assertEquals(0, reduceExecCnt.get());
+
+            info("Releasing combiner latch.");
+
+            latch.get("combineAwaitLatch").countDown();
+
+            checkStatus(jobId, false);
+
+            info("Releasing reduce latch.");
+
+            latch.get("reduceAwaitLatch").countDown();
+
+            checkStatus(jobId, true);
+
+            assertEquals(10, mapExecCnt.get());
+            assertEquals(10, combineExecCnt.get());
+            assertEquals(1, reduceExecCnt.get());
+        }
+        finally {
+            // Safety.
+            latch.get("mapAwaitLatch").countDown();
+            latch.get("combineAwaitLatch").countDown();
+            latch.get("reduceAwaitLatch").countDown();
+        }
+    }
+
+    /**
+     * Checks job execution status.
+     *
+     * @param jobId Job ID.
+     * @param complete Completion status.
+     * @throws Exception If failed.
+     */
+    private void checkStatus(HadoopJobId jobId, boolean complete) throws Exception {
+        for (int i = 0; i < gridCount(); i++) {
+            IgniteKernal kernal = (IgniteKernal)grid(i);
+
+            Hadoop hadoop = kernal.hadoop();
+
+            HadoopJobStatus stat = hadoop.status(jobId);
+
+            assert stat != null;
+
+            IgniteInternalFuture<?> fut = hadoop.finishFuture(jobId);
+
+            if (!complete)
+                assertFalse(fut.isDone());
+            else {
+                info("Waiting for status future completion on node [idx=" + i + ", nodeId=" +
+                    kernal.getLocalNodeId() + ']');
+
+                fut.get();
+            }
+        }
+    }
+
+    /**
+     * Test input format
+     */
+    public static class InFormat extends InputFormat {
+
+        @Override public List<InputSplit> getSplits(JobContext ctx) throws IOException, InterruptedException {
+            List<InputSplit> res = new ArrayList<>(BLOCK_CNT);
+
+            for (int i = 0; i < BLOCK_CNT; i++)
+                try {
+                    res.add(new FileSplit(new Path(new URI("someFile")), i, i + 1, new String[] {"localhost"}));
+                }
+                catch (URISyntaxException e) {
+                    throw new IOException(e);
+                }
+
+            return res;
+        }
+
+        @Override public RecordReader createRecordReader(InputSplit split, TaskAttemptContext ctx) throws IOException, InterruptedException {
+            return new RecordReader() {
+                @Override public void initialize(InputSplit split, TaskAttemptContext ctx) {
+                }
+
+                @Override public boolean nextKeyValue() {
+                    return false;
+                }
+
+                @Override public Object getCurrentKey() {
+                    return null;
+                }
+
+                @Override public Object getCurrentValue() {
+                    return null;
+                }
+
+                @Override public float getProgress() {
+                    return 0;
+                }
+
+                @Override public void close() {
+
+                }
+            };
+        }
+    }
+
+    /**
+     * Test mapper.
+     */
+    private static class TestMapper extends Mapper {
+        @Override public void run(Context ctx) throws IOException, InterruptedException {
+            System.out.println("Running task: " + ctx.getTaskAttemptID().getTaskID().getId());
+
+            latch.get("mapAwaitLatch").await();
+
+            mapExecCnt.incrementAndGet();
+
+            System.out.println("Completed task: " + ctx.getTaskAttemptID().getTaskID().getId());
+        }
+    }
+
+    /**
+     * Test reducer.
+     */
+    private static class TestReducer extends Reducer {
+        @Override public void run(Context ctx) throws IOException, InterruptedException {
+            System.out.println("Running task: " + ctx.getTaskAttemptID().getTaskID().getId());
+
+            latch.get("reduceAwaitLatch").await();
+
+            reduceExecCnt.incrementAndGet();
+
+            System.out.println("Completed task: " + ctx.getTaskAttemptID().getTaskID().getId());
+        }
+    }
+
+    /**
+     * Test combiner.
+     */
+    private static class TestCombiner extends Reducer {
+        @Override public void run(Context ctx) throws IOException, InterruptedException {
+            System.out.println("Running task: " + ctx.getTaskAttemptID().getTaskID().getId());
+
+            latch.get("combineAwaitLatch").await();
+
+            combineExecCnt.incrementAndGet();
+
+            System.out.println("Completed task: " + ctx.getTaskAttemptID().getTaskID().getId());
+        }
+    }
+}

http://git-wip-us.apache.org/repos/asf/incubator-ignite/blob/498dcfab/modules/hadoop/src/test/java/org/apache/ignite/internal/processors/hadoop/HadoopMapReduceEmbeddedSelfTest.java
----------------------------------------------------------------------
diff --git a/modules/hadoop/src/test/java/org/apache/ignite/internal/processors/hadoop/HadoopMapReduceEmbeddedSelfTest.java b/modules/hadoop/src/test/java/org/apache/ignite/internal/processors/hadoop/HadoopMapReduceEmbeddedSelfTest.java
new file mode 100644
index 0000000..4a6e1ef
--- /dev/null
+++ b/modules/hadoop/src/test/java/org/apache/ignite/internal/processors/hadoop/HadoopMapReduceEmbeddedSelfTest.java
@@ -0,0 +1,246 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.ignite.internal.processors.hadoop;
+
+import org.apache.hadoop.conf.*;
+import org.apache.hadoop.fs.*;
+import org.apache.hadoop.io.*;
+import org.apache.hadoop.io.serializer.*;
+import org.apache.hadoop.mapred.*;
+import org.apache.hadoop.mapreduce.*;
+import org.apache.hadoop.mapreduce.lib.input.FileInputFormat;
+import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat;
+import org.apache.ignite.configuration.*;
+import org.apache.ignite.igfs.*;
+import org.apache.ignite.internal.*;
+import org.apache.ignite.internal.processors.hadoop.examples.*;
+
+import java.util.*;
+
+import static org.apache.ignite.internal.processors.hadoop.HadoopUtils.*;
+
+/**
+ * Tests map-reduce execution with embedded mode.
+ */
+public class HadoopMapReduceEmbeddedSelfTest extends HadoopMapReduceTest {
+    /** */
+    private static Map<String, Boolean> flags = HadoopSharedMap.map(HadoopMapReduceEmbeddedSelfTest.class)
+        .put("flags", new HashMap<String, Boolean>());
+
+    /** {@inheritDoc} */
+    @Override public HadoopConfiguration hadoopConfiguration(String gridName) {
+        HadoopConfiguration cfg = super.hadoopConfiguration(gridName);
+
+        cfg.setExternalExecution(false);
+
+        return cfg;
+    }
+
+    /**
+     * Tests whole job execution with all phases in old and new versions of API with definition of custom
+     * Serialization, Partitioner and IO formats.
+     * @throws Exception If fails.
+     */
+    public void testMultiReducerWholeMapReduceExecution() throws Exception {
+        IgfsPath inDir = new IgfsPath(PATH_INPUT);
+
+        igfs.mkdirs(inDir);
+
+        IgfsPath inFile = new IgfsPath(inDir, HadoopWordCount2.class.getSimpleName() + "-input");
+
+        generateTestFile(inFile.toString(), "key1", 10000, "key2", 20000, "key3", 15000, "key4", 7000, "key5", 12000,
+            "key6", 18000 );
+
+        for (int i = 0; i < 2; i++) {
+            boolean useNewAPI = i == 1;
+
+            igfs.delete(new IgfsPath(PATH_OUTPUT), true);
+
+            flags.put("serializationWasConfigured", false);
+            flags.put("partitionerWasConfigured", false);
+            flags.put("inputFormatWasConfigured", false);
+            flags.put("outputFormatWasConfigured", false);
+
+            JobConf jobConf = new JobConf();
+
+            jobConf.set(CommonConfigurationKeys.IO_SERIALIZATIONS_KEY, CustomSerialization.class.getName());
+
+            //To split into about 6-7 items for v2
+            jobConf.setInt(FileInputFormat.SPLIT_MAXSIZE, 65000);
+
+            //For v1
+            jobConf.setInt("fs.local.block.size", 65000);
+
+            // File system coordinates.
+            setupFileSystems(jobConf);
+
+            HadoopWordCount1.setTasksClasses(jobConf, !useNewAPI, !useNewAPI, !useNewAPI);
+
+            if (!useNewAPI) {
+                jobConf.setPartitionerClass(CustomV1Partitioner.class);
+                jobConf.setInputFormat(CustomV1InputFormat.class);
+                jobConf.setOutputFormat(CustomV1OutputFormat.class);
+            }
+
+            Job job = Job.getInstance(jobConf);
+
+            HadoopWordCount2.setTasksClasses(job, useNewAPI, useNewAPI, useNewAPI);
+
+            if (useNewAPI) {
+                job.setPartitionerClass(CustomV2Partitioner.class);
+                job.setInputFormatClass(CustomV2InputFormat.class);
+                job.setOutputFormatClass(CustomV2OutputFormat.class);
+            }
+
+            job.setOutputKeyClass(Text.class);
+            job.setOutputValueClass(IntWritable.class);
+
+            FileInputFormat.setInputPaths(job, new Path(igfsScheme() + inFile.toString()));
+            FileOutputFormat.setOutputPath(job, new Path(igfsScheme() + PATH_OUTPUT));
+
+            job.setNumReduceTasks(3);
+
+            job.setJarByClass(HadoopWordCount2.class);
+
+            IgniteInternalFuture<?> fut = grid(0).hadoop().submit(new HadoopJobId(UUID.randomUUID(), 1),
+                    createJobInfo(job.getConfiguration()));
+
+            fut.get();
+
+            assertTrue("Serialization was configured (new API is " + useNewAPI + ")",
+                 flags.get("serializationWasConfigured"));
+
+            assertTrue("Partitioner was configured (new API is = " + useNewAPI + ")",
+                 flags.get("partitionerWasConfigured"));
+
+            assertTrue("Input format was configured (new API is = " + useNewAPI + ")",
+                 flags.get("inputFormatWasConfigured"));
+
+            assertTrue("Output format was configured (new API is = " + useNewAPI + ")",
+                 flags.get("outputFormatWasConfigured"));
+
+            assertEquals("Use new API = " + useNewAPI,
+                "key3\t15000\n" +
+                "key6\t18000\n",
+                readAndSortFile(PATH_OUTPUT + "/" + (useNewAPI ? "part-r-" : "part-") + "00000")
+            );
+
+            assertEquals("Use new API = " + useNewAPI,
+                "key1\t10000\n" +
+                "key4\t7000\n",
+                readAndSortFile(PATH_OUTPUT + "/" + (useNewAPI ? "part-r-" : "part-") + "00001")
+            );
+
+            assertEquals("Use new API = " + useNewAPI,
+                "key2\t20000\n" +
+                "key5\t12000\n",
+                readAndSortFile(PATH_OUTPUT + "/" + (useNewAPI ? "part-r-" : "part-") + "00002")
+            );
+
+        }
+    }
+
+    /**
+     * Custom serialization class that inherits behaviour of native {@link WritableSerialization}.
+     */
+    protected static class CustomSerialization extends WritableSerialization {
+        @Override public void setConf(Configuration conf) {
+            super.setConf(conf);
+
+            flags.put("serializationWasConfigured", true);
+        }
+    }
+
+    /**
+     * Custom implementation of Partitioner in v1 API.
+     */
+    private static class CustomV1Partitioner extends org.apache.hadoop.mapred.lib.HashPartitioner {
+        /** {@inheritDoc} */
+        @Override public void configure(JobConf job) {
+            flags.put("partitionerWasConfigured", true);
+        }
+    }
+
+    /**
+     * Custom implementation of Partitioner in v2 API.
+     */
+    private static class CustomV2Partitioner extends org.apache.hadoop.mapreduce.lib.partition.HashPartitioner
+            implements Configurable {
+        /** {@inheritDoc} */
+        @Override public void setConf(Configuration conf) {
+            flags.put("partitionerWasConfigured", true);
+        }
+
+        /** {@inheritDoc} */
+        @Override public Configuration getConf() {
+            return null;
+        }
+    }
+
+    /**
+     * Custom implementation of InputFormat in v2 API.
+     */
+    private static class CustomV2InputFormat extends org.apache.hadoop.mapreduce.lib.input.TextInputFormat implements Configurable {
+        /** {@inheritDoc} */
+        @Override public void setConf(Configuration conf) {
+            flags.put("inputFormatWasConfigured", true);
+        }
+
+        /** {@inheritDoc} */
+        @Override public Configuration getConf() {
+            return null;
+        }
+    }
+
+    /**
+     * Custom implementation of OutputFormat in v2 API.
+     */
+    private static class CustomV2OutputFormat extends org.apache.hadoop.mapreduce.lib.output.TextOutputFormat implements Configurable {
+        /** {@inheritDoc} */
+        @Override public void setConf(Configuration conf) {
+            flags.put("outputFormatWasConfigured", true);
+        }
+
+        /** {@inheritDoc} */
+        @Override public Configuration getConf() {
+            return null;
+        }
+    }
+
+    /**
+     * Custom implementation of InputFormat in v1 API.
+     */
+    private static class CustomV1InputFormat extends org.apache.hadoop.mapred.TextInputFormat {
+        /** {@inheritDoc} */
+        @Override public void configure(JobConf job) {
+            super.configure(job);
+
+            flags.put("inputFormatWasConfigured", true);
+        }
+    }
+
+    /**
+     * Custom implementation of OutputFormat in v1 API.
+     */
+    private static class CustomV1OutputFormat extends org.apache.hadoop.mapred.TextOutputFormat implements JobConfigurable {
+        /** {@inheritDoc} */
+        @Override public void configure(JobConf job) {
+            flags.put("outputFormatWasConfigured", true);
+        }
+    }
+}

http://git-wip-us.apache.org/repos/asf/incubator-ignite/blob/498dcfab/modules/hadoop/src/test/java/org/apache/ignite/internal/processors/hadoop/HadoopMapReduceTest.java
----------------------------------------------------------------------
diff --git a/modules/hadoop/src/test/java/org/apache/ignite/internal/processors/hadoop/HadoopMapReduceTest.java b/modules/hadoop/src/test/java/org/apache/ignite/internal/processors/hadoop/HadoopMapReduceTest.java
new file mode 100644
index 0000000..6242ecc
--- /dev/null
+++ b/modules/hadoop/src/test/java/org/apache/ignite/internal/processors/hadoop/HadoopMapReduceTest.java
@@ -0,0 +1,197 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.ignite.internal.processors.hadoop;
+
+import org.apache.hadoop.fs.*;
+import org.apache.hadoop.io.*;
+import org.apache.hadoop.mapred.*;
+import org.apache.hadoop.mapreduce.*;
+import org.apache.hadoop.mapreduce.lib.input.FileInputFormat;
+import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat;
+import org.apache.ignite.*;
+import org.apache.ignite.hadoop.fs.*;
+import org.apache.ignite.igfs.*;
+import org.apache.ignite.internal.*;
+import org.apache.ignite.internal.processors.hadoop.counter.*;
+import org.apache.ignite.internal.processors.hadoop.counter.HadoopCounters;
+import org.apache.ignite.internal.processors.hadoop.examples.*;
+import org.apache.ignite.internal.util.lang.*;
+import org.apache.ignite.internal.util.typedef.*;
+import org.apache.ignite.testframework.*;
+
+import java.io.*;
+import java.util.*;
+
+import static org.apache.ignite.internal.processors.hadoop.HadoopUtils.*;
+
+/**
+ * Test of whole cycle of map-reduce processing via Job tracker.
+ */
+public class HadoopMapReduceTest extends HadoopAbstractWordCountTest {
+    /** {@inheritDoc} */
+    @Override protected int gridCount() {
+        return 3;
+    }
+
+    /**
+     * Tests whole job execution with all phases in all combination of new and old versions of API.
+     * @throws Exception If fails.
+     */
+    public void testWholeMapReduceExecution() throws Exception {
+        IgfsPath inDir = new IgfsPath(PATH_INPUT);
+
+        igfs.mkdirs(inDir);
+
+        IgfsPath inFile = new IgfsPath(inDir, HadoopWordCount2.class.getSimpleName() + "-input");
+
+        generateTestFile(inFile.toString(), "red", 100000, "blue", 200000, "green", 150000, "yellow", 70000 );
+
+        for (int i = 0; i < 8; i++) {
+            igfs.delete(new IgfsPath(PATH_OUTPUT), true);
+
+            boolean useNewMapper = (i & 1) == 0;
+            boolean useNewCombiner = (i & 2) == 0;
+            boolean useNewReducer = (i & 4) == 0;
+
+            JobConf jobConf = new JobConf();
+
+            jobConf.set(JOB_COUNTER_WRITER_PROPERTY, IgniteHadoopFileSystemCounterWriter.class.getName());
+            jobConf.setUser("yyy");
+            jobConf.set(IgniteHadoopFileSystemCounterWriter.COUNTER_WRITER_DIR_PROPERTY, "/xxx/${USER}/zzz");
+
+            //To split into about 40 items for v2
+            jobConf.setInt(FileInputFormat.SPLIT_MAXSIZE, 65000);
+
+            //For v1
+            jobConf.setInt("fs.local.block.size", 65000);
+
+            // File system coordinates.
+            setupFileSystems(jobConf);
+
+            HadoopWordCount1.setTasksClasses(jobConf, !useNewMapper, !useNewCombiner, !useNewReducer);
+
+            Job job = Job.getInstance(jobConf);
+
+            HadoopWordCount2.setTasksClasses(job, useNewMapper, useNewCombiner, useNewReducer);
+
+            job.setOutputKeyClass(Text.class);
+            job.setOutputValueClass(IntWritable.class);
+
+            FileInputFormat.setInputPaths(job, new Path(igfsScheme() + inFile.toString()));
+            FileOutputFormat.setOutputPath(job, new Path(igfsScheme() + PATH_OUTPUT));
+
+            job.setJarByClass(HadoopWordCount2.class);
+
+            HadoopJobId jobId = new HadoopJobId(UUID.randomUUID(), 1);
+
+            IgniteInternalFuture<?> fut = grid(0).hadoop().submit(jobId, createJobInfo(job.getConfiguration()));
+
+            fut.get();
+
+            checkJobStatistics(jobId);
+
+            assertEquals("Use new mapper: " + useNewMapper + ", new combiner: " + useNewCombiner + ", new reducer: " +
+                useNewReducer,
+                "blue\t200000\n" +
+                "green\t150000\n" +
+                "red\t100000\n" +
+                "yellow\t70000\n",
+                readAndSortFile(PATH_OUTPUT + "/" + (useNewReducer ? "part-r-" : "part-") + "00000")
+            );
+        }
+    }
+
+    /**
+     * Simple test job statistics.
+     *
+     * @param jobId Job id.
+     * @throws IgniteCheckedException
+     */
+    private void checkJobStatistics(HadoopJobId jobId) throws IgniteCheckedException, IOException {
+        HadoopCounters cntrs = grid(0).hadoop().counters(jobId);
+
+        HadoopPerformanceCounter perfCntr = HadoopPerformanceCounter.getCounter(cntrs, null);
+
+        Map<String, SortedMap<Integer,Long>> tasks = new TreeMap<>();
+
+        Map<String, Integer> phaseOrders = new HashMap<>();
+        phaseOrders.put("submit", 0);
+        phaseOrders.put("prepare", 1);
+        phaseOrders.put("start", 2);
+        phaseOrders.put("Cstart", 3);
+        phaseOrders.put("finish", 4);
+
+        String prevTaskId = null;
+
+        long apiEvtCnt = 0;
+
+        for (T2<String, Long> evt : perfCntr.evts()) {
+            //We expect string pattern: COMBINE 1 run 7fa86a14-5a08-40e3-a7cb-98109b52a706
+            String[] parsedEvt = evt.get1().split(" ");
+
+            String taskId;
+            String taskPhase;
+
+            if ("JOB".equals(parsedEvt[0])) {
+                taskId = parsedEvt[0];
+                taskPhase = parsedEvt[1];
+            }
+            else {
+                taskId = ("COMBINE".equals(parsedEvt[0]) ? "MAP" : parsedEvt[0].substring(0, 3)) + parsedEvt[1];
+                taskPhase = ("COMBINE".equals(parsedEvt[0]) ? "C" : "") + parsedEvt[2];
+            }
+
+            if (!taskId.equals(prevTaskId))
+                tasks.put(taskId, new TreeMap<Integer,Long>());
+
+            Integer pos = phaseOrders.get(taskPhase);
+
+            assertNotNull("Invalid phase " + taskPhase, pos);
+
+            tasks.get(taskId).put(pos, evt.get2());
+
+            prevTaskId = taskId;
+
+            apiEvtCnt++;
+        }
+
+        for (Map.Entry<String ,SortedMap<Integer,Long>> task : tasks.entrySet()) {
+            Map<Integer, Long> order = task.getValue();
+
+            long prev = 0;
+
+            for (Map.Entry<Integer, Long> phase : order.entrySet()) {
+                assertTrue("Phase order of " + task.getKey() + " is invalid", phase.getValue() >= prev);
+
+                prev = phase.getValue();
+            }
+        }
+
+        final IgfsPath statPath = new IgfsPath("/xxx/yyy/zzz/" + jobId + "/performance");
+
+        GridTestUtils.waitForCondition(new GridAbsPredicate() {
+            @Override public boolean apply() {
+                return igfs.exists(statPath);
+            }
+        }, 10000);
+
+        BufferedReader reader = new BufferedReader(new InputStreamReader(igfs.open(statPath)));
+
+        assertEquals(apiEvtCnt, HadoopTestUtils.simpleCheckJobStatFile(reader));
+    }
+}


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