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From tzuli...@apache.org
Subject [02/12] flink git commit: [FLINK-6830] [kafka] Port migration tests for FlinkKafkaConsumerBase to Flink 1.3
Date Wed, 07 Jun 2017 16:29:59 GMT
[FLINK-6830] [kafka] Port migration tests for FlinkKafkaConsumerBase to Flink 1.3

This commit also consolidates all tests for migration from Flink 1.1 and
1.2 for the FlinkKafkaConsumerBase to a single class
FlinkKafkaConsumerBaseMigrationTest. Parameterization is used to test
migration from different Flink version savepoints.


Project: http://git-wip-us.apache.org/repos/asf/flink/repo
Commit: http://git-wip-us.apache.org/repos/asf/flink/commit/e9688632
Tree: http://git-wip-us.apache.org/repos/asf/flink/tree/e9688632
Diff: http://git-wip-us.apache.org/repos/asf/flink/diff/e9688632

Branch: refs/heads/master
Commit: e96886323bee008091567d16c4ed053d3aa0eccf
Parents: 1ad554d
Author: Tzu-Li (Gordon) Tai <tzulitai@apache.org>
Authored: Sun Jun 4 00:18:26 2017 +0200
Committer: Tzu-Li (Gordon) Tai <tzulitai@apache.org>
Committed: Wed Jun 7 18:28:58 2017 +0200

----------------------------------------------------------------------
 ...inkKafkaConsumerBaseFrom11MigrationTest.java | 348 -----------------
 ...inkKafkaConsumerBaseFrom12MigrationTest.java | 339 -----------------
 .../FlinkKafkaConsumerBaseMigrationTest.java    | 374 +++++++++++++++++++
 ...migration-test-flink1.3-empty-state-snapshot | Bin 0 -> 473 bytes
 ...ka-consumer-migration-test-flink1.3-snapshot | Bin 0 -> 1255 bytes
 5 files changed, 374 insertions(+), 687 deletions(-)
----------------------------------------------------------------------


http://git-wip-us.apache.org/repos/asf/flink/blob/e9688632/flink-connectors/flink-connector-kafka-base/src/test/java/org/apache/flink/streaming/connectors/kafka/FlinkKafkaConsumerBaseFrom11MigrationTest.java
----------------------------------------------------------------------
diff --git a/flink-connectors/flink-connector-kafka-base/src/test/java/org/apache/flink/streaming/connectors/kafka/FlinkKafkaConsumerBaseFrom11MigrationTest.java
b/flink-connectors/flink-connector-kafka-base/src/test/java/org/apache/flink/streaming/connectors/kafka/FlinkKafkaConsumerBaseFrom11MigrationTest.java
deleted file mode 100644
index 77417ab..0000000
--- a/flink-connectors/flink-connector-kafka-base/src/test/java/org/apache/flink/streaming/connectors/kafka/FlinkKafkaConsumerBaseFrom11MigrationTest.java
+++ /dev/null
@@ -1,348 +0,0 @@
-/*
- * 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.flink.streaming.connectors.kafka;
-
-import org.apache.flink.streaming.api.TimeCharacteristic;
-import org.apache.flink.streaming.api.functions.AssignerWithPeriodicWatermarks;
-import org.apache.flink.streaming.api.functions.AssignerWithPunctuatedWatermarks;
-import org.apache.flink.streaming.api.operators.StreamSource;
-import org.apache.flink.streaming.api.operators.StreamingRuntimeContext;
-import org.apache.flink.streaming.connectors.kafka.config.OffsetCommitMode;
-import org.apache.flink.streaming.connectors.kafka.internals.AbstractFetcher;
-import org.apache.flink.streaming.connectors.kafka.internals.KafkaTopicPartition;
-import org.apache.flink.streaming.connectors.kafka.internals.KafkaTopicPartitionStateSentinel;
-import org.apache.flink.streaming.util.AbstractStreamOperatorTestHarness;
-import org.apache.flink.streaming.util.serialization.KeyedDeserializationSchema;
-import org.apache.flink.util.SerializedValue;
-
-import org.junit.Assert;
-import org.junit.Test;
-
-import java.net.URL;
-import java.util.ArrayList;
-import java.util.Arrays;
-import java.util.Collections;
-import java.util.HashMap;
-import java.util.List;
-import java.util.Map;
-
-import static org.mockito.Mockito.mock;
-
-/**
- * Tests for checking whether {@link FlinkKafkaConsumerBase} can restore from snapshots that
were
- * done using the Flink 1.1 {@link FlinkKafkaConsumerBase}.
- *
- * <p>For regenerating the binary snapshot file you have to run the commented out portion
- * of each test on a checkout of the Flink 1.1 branch.
- */
-public class FlinkKafkaConsumerBaseFrom11MigrationTest {
-
-	/** Test restoring from an legacy empty state, when no partitions could be found for topics.
*/
-	@Test
-	public void testRestoreFromFlink11WithEmptyStateNoPartitions() throws Exception {
-		final DummyFlinkKafkaConsumer<String> consumerFunction =
-			new DummyFlinkKafkaConsumer<>(Collections.<KafkaTopicPartition>emptyList());
-
-		StreamSource<String, DummyFlinkKafkaConsumer<String>> consumerOperator = new
StreamSource<>(consumerFunction);
-
-		final AbstractStreamOperatorTestHarness<String> testHarness =
-			new AbstractStreamOperatorTestHarness<>(consumerOperator, 1, 1, 0);
-
-		testHarness.setTimeCharacteristic(TimeCharacteristic.ProcessingTime);
-
-		testHarness.setup();
-		// restore state from binary snapshot file using legacy method
-		testHarness.initializeStateFromLegacyCheckpoint(
-			getResourceFilename("kafka-consumer-migration-test-flink1.1-empty-state-snapshot"));
-		testHarness.open();
-
-		// assert that no partitions were found and is empty
-		Assert.assertTrue(consumerFunction.getSubscribedPartitionsToStartOffsets() != null);
-		Assert.assertTrue(consumerFunction.getSubscribedPartitionsToStartOffsets().isEmpty());
-
-		// assert that no state was restored
-		Assert.assertTrue(consumerFunction.getRestoredState() == null);
-
-		consumerOperator.close();
-		consumerOperator.cancel();
-	}
-
-	/** Test restoring from an empty state taken using Flink 1.1, when some partitions could
be found for topics. */
-	@Test
-	public void testRestoreFromFlink11WithEmptyStateWithPartitions() throws Exception {
-		final List<KafkaTopicPartition> partitions = new ArrayList<>();
-		partitions.add(new KafkaTopicPartition("abc", 13));
-		partitions.add(new KafkaTopicPartition("def", 7));
-
-		final DummyFlinkKafkaConsumer<String> consumerFunction = new DummyFlinkKafkaConsumer<>(partitions);
-
-		StreamSource<String, DummyFlinkKafkaConsumer<String>> consumerOperator =
-			new StreamSource<>(consumerFunction);
-
-		final AbstractStreamOperatorTestHarness<String> testHarness =
-			new AbstractStreamOperatorTestHarness<>(consumerOperator, 1, 1, 0);
-
-		testHarness.setTimeCharacteristic(TimeCharacteristic.ProcessingTime);
-
-		testHarness.setup();
-		// restore state from binary snapshot file using legacy method
-		testHarness.initializeStateFromLegacyCheckpoint(
-			getResourceFilename("kafka-consumer-migration-test-flink1.1-empty-state-snapshot"));
-		testHarness.open();
-
-		// the expected state in "kafka-consumer-migration-test-flink1.1-empty-state-snapshot";
-		// since the state is empty, the consumer should reflect on the startup mode to determine
start offsets.
-		final HashMap<KafkaTopicPartition, Long> expectedSubscribedPartitionsWithStartOffsets
= new HashMap<>();
-		expectedSubscribedPartitionsWithStartOffsets.put(new KafkaTopicPartition("abc", 13), KafkaTopicPartitionStateSentinel.GROUP_OFFSET);
-		expectedSubscribedPartitionsWithStartOffsets.put(new KafkaTopicPartition("def", 7), KafkaTopicPartitionStateSentinel.GROUP_OFFSET);
-
-		// assert that there are partitions and is identical to expected list
-		Assert.assertTrue(consumerFunction.getSubscribedPartitionsToStartOffsets() != null);
-		Assert.assertTrue(!consumerFunction.getSubscribedPartitionsToStartOffsets().isEmpty());
-		Assert.assertEquals(expectedSubscribedPartitionsWithStartOffsets, consumerFunction.getSubscribedPartitionsToStartOffsets());
-
-		// assert that no state was restored
-		Assert.assertTrue(consumerFunction.getRestoredState() == null);
-
-		consumerOperator.close();
-		consumerOperator.cancel();
-	}
-
-	/** Test restoring from a non-empty state taken using Flink 1.1, when some partitions could
be found for topics. */
-	@Test
-	public void testRestoreFromFlink11() throws Exception {
-		final List<KafkaTopicPartition> partitions = new ArrayList<>();
-		partitions.add(new KafkaTopicPartition("abc", 13));
-		partitions.add(new KafkaTopicPartition("def", 7));
-
-		final DummyFlinkKafkaConsumer<String> consumerFunction = new DummyFlinkKafkaConsumer<>(partitions);
-
-		StreamSource<String, DummyFlinkKafkaConsumer<String>> consumerOperator =
-			new StreamSource<>(consumerFunction);
-
-		final AbstractStreamOperatorTestHarness<String> testHarness =
-			new AbstractStreamOperatorTestHarness<>(consumerOperator, 1, 1, 0);
-
-		testHarness.setTimeCharacteristic(TimeCharacteristic.ProcessingTime);
-
-		testHarness.setup();
-		// restore state from binary snapshot file using legacy method
-		testHarness.initializeStateFromLegacyCheckpoint(
-			getResourceFilename("kafka-consumer-migration-test-flink1.1-snapshot"));
-		testHarness.open();
-
-		// the expected state in "kafka-consumer-migration-test-flink1.1-snapshot"
-		final HashMap<KafkaTopicPartition, Long> expectedState = new HashMap<>();
-		expectedState.put(new KafkaTopicPartition("abc", 13), 16768L);
-		expectedState.put(new KafkaTopicPartition("def", 7), 987654321L);
-
-		// assert that there are partitions and is identical to expected list
-		Assert.assertTrue(consumerFunction.getSubscribedPartitionsToStartOffsets() != null);
-		Assert.assertTrue(!consumerFunction.getSubscribedPartitionsToStartOffsets().isEmpty());
-
-		// on restore, subscribedPartitionsToStartOffsets should be identical to the restored state
-		Assert.assertEquals(expectedState, consumerFunction.getSubscribedPartitionsToStartOffsets());
-
-		// assert that state is correctly restored from legacy checkpoint
-		Assert.assertTrue(consumerFunction.getRestoredState() != null);
-		Assert.assertEquals(expectedState, consumerFunction.getRestoredState());
-
-		consumerOperator.close();
-		consumerOperator.cancel();
-	}
-
-	// ------------------------------------------------------------------------
-
-	private static String getResourceFilename(String filename) {
-		ClassLoader cl = FlinkKafkaConsumerBaseFrom11MigrationTest.class.getClassLoader();
-		URL resource = cl.getResource(filename);
-		if (resource == null) {
-			throw new NullPointerException("Missing snapshot resource.");
-		}
-		return resource.getFile();
-	}
-
-	private static class DummyFlinkKafkaConsumer<T> extends FlinkKafkaConsumerBase<T>
{
-		private static final long serialVersionUID = 1L;
-
-		private final List<KafkaTopicPartition> partitions;
-
-		@SuppressWarnings("unchecked")
-		DummyFlinkKafkaConsumer(List<KafkaTopicPartition> partitions) {
-			super(Arrays.asList("dummy-topic"), (KeyedDeserializationSchema< T >) mock(KeyedDeserializationSchema.class));
-			this.partitions = partitions;
-		}
-
-		@Override
-		protected AbstractFetcher<T, ?> createFetcher(
-				SourceContext<T> sourceContext,
-				Map<KafkaTopicPartition, Long> thisSubtaskPartitionsWithStartOffsets,
-				SerializedValue<AssignerWithPeriodicWatermarks<T>> watermarksPeriodic,
-				SerializedValue<AssignerWithPunctuatedWatermarks<T>> watermarksPunctuated,
-				StreamingRuntimeContext runtimeContext,
-				OffsetCommitMode offsetCommitMode) throws Exception {
-			return mock(AbstractFetcher.class);
-		}
-
-		@Override
-		protected List<KafkaTopicPartition> getKafkaPartitions(List<String> topics)
{
-			return partitions;
-		}
-
-		@Override
-		protected boolean getIsAutoCommitEnabled() {
-			return false;
-		}
-	}
-}
-
-/*
-	THE CODE FOR FLINK 1.1
-
-	@Test
-	public void testRestoreFromFlink11() throws Exception {
-		// --------------------------------------------------------------------
-		//   prepare fake states
-		// --------------------------------------------------------------------
-
-		final HashMap<KafkaTopicPartition, Long> state1 = new HashMap<>();
-		state1.put(new KafkaTopicPartition("abc", 13), 16768L);
-		state1.put(new KafkaTopicPartition("def", 7), 987654321L);
-
-		final OneShotLatch latch = new OneShotLatch();
-		final AbstractFetcher<String, ?> fetcher = mock(AbstractFetcher.class);
-
-		doAnswer(new Answer<Void>() {
-			@Override
-			public Void answer(InvocationOnMock invocation) throws Throwable {
-				latch.trigger();
-				return null;
-			}
-		}).when(fetcher).runFetchLoop();
-
-		when(fetcher.snapshotCurrentState()).thenReturn(state1);
-
-		final DummyFlinkKafkaConsumer<String> consumerFunction = new DummyFlinkKafkaConsumer<>(
-			new FetcherFactory<String>() {
-				private static final long serialVersionUID = -2803131905656983619L;
-
-				@Override
-				public AbstractFetcher<String, ?> createFetcher() {
-					return fetcher;
-				}
-			});
-
-		StreamSource<String, DummyFlinkKafkaConsumer<String>> consumerOperator =
-			new StreamSource<>(consumerFunction);
-
-		final OneInputStreamOperatorTestHarness<Void, String> testHarness =
-			new OneInputStreamOperatorTestHarness<>(consumerOperator);
-
-		testHarness.setTimeCharacteristic(TimeCharacteristic.ProcessingTime);
-
-		testHarness.setup();
-		testHarness.open();
-
-		final Throwable[] error = new Throwable[1];
-
-		// run the source asynchronously
-		Thread runner = new Thread() {
-			@Override
-			public void run() {
-				try {
-					consumerFunction.run(new DummySourceContext() {
-						@Override
-						public void collect(String element) {
-							latch.trigger();
-						}
-					});
-				}
-				catch (Throwable t) {
-					t.printStackTrace();
-					error[0] = t;
-				}
-			}
-		};
-		runner.start();
-
-		if (!latch.isTriggered()) {
-			latch.await();
-		}
-
-		StreamTaskState snapshot = testHarness.snapshot(0L, 0L);
-		testHarness.snaphotToFile(snapshot, "src/test/resources/kafka-consumer-migration-test-flink1.1-snapshot-2");
-		consumerOperator.run(new Object());
-
-		consumerOperator.close();
-		runner.join();
-
-		System.out.println("Killed");
-	}
-
-	private static abstract class DummySourceContext
-		implements SourceFunction.SourceContext<String> {
-
-		private final Object lock = new Object();
-
-		@Override
-		public void collectWithTimestamp(String element, long timestamp) {
-		}
-
-		@Override
-		public void emitWatermark(Watermark mark) {
-		}
-
-		@Override
-		public Object getCheckpointLock() {
-			return lock;
-		}
-
-		@Override
-		public void close() {
-		}
-	}
-
-	// ------------------------------------------------------------------------
-
-	private interface FetcherFactory<T> extends Serializable {
-		AbstractFetcher<T, ?> createFetcher();
-	}
-
-	private static class DummyFlinkKafkaConsumer<T> extends FlinkKafkaConsumerBase<T>
{
-		private static final long serialVersionUID = 1L;
-
-		private final FetcherFactory<T> fetcherFactory;
-
-		@SuppressWarnings("unchecked")
-		public DummyFlinkKafkaConsumer(FetcherFactory<T> fetcherFactory) {
-			super((KeyedDeserializationSchema< T >) mock(KeyedDeserializationSchema.class));
-
-			final List<KafkaTopicPartition> partitions = new ArrayList<>();
-			partitions.add(new KafkaTopicPartition("dummy-topic", 0));
-			setSubscribedPartitions(partitions);
-
-			this.fetcherFactory = fetcherFactory;
-		}
-
-		@Override
-		protected AbstractFetcher<T, ?> createFetcher(SourceContext<T> sourceContext,
List<KafkaTopicPartition> thisSubtaskPartitions, SerializedValue<AssignerWithPeriodicWatermarks<T>>
watermarksPeriodic, SerializedValue<AssignerWithPunctuatedWatermarks<T>> watermarksPunctuated,
StreamingRuntimeContext runtimeContext) throws Exception {
-			return fetcherFactory.createFetcher();
-		}
-	}
-* */

http://git-wip-us.apache.org/repos/asf/flink/blob/e9688632/flink-connectors/flink-connector-kafka-base/src/test/java/org/apache/flink/streaming/connectors/kafka/FlinkKafkaConsumerBaseFrom12MigrationTest.java
----------------------------------------------------------------------
diff --git a/flink-connectors/flink-connector-kafka-base/src/test/java/org/apache/flink/streaming/connectors/kafka/FlinkKafkaConsumerBaseFrom12MigrationTest.java
b/flink-connectors/flink-connector-kafka-base/src/test/java/org/apache/flink/streaming/connectors/kafka/FlinkKafkaConsumerBaseFrom12MigrationTest.java
deleted file mode 100644
index f13cbe0..0000000
--- a/flink-connectors/flink-connector-kafka-base/src/test/java/org/apache/flink/streaming/connectors/kafka/FlinkKafkaConsumerBaseFrom12MigrationTest.java
+++ /dev/null
@@ -1,339 +0,0 @@
-/*
- * 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.flink.streaming.connectors.kafka;
-
-import org.apache.flink.core.testutils.OneShotLatch;
-import org.apache.flink.streaming.api.TimeCharacteristic;
-import org.apache.flink.streaming.api.functions.AssignerWithPeriodicWatermarks;
-import org.apache.flink.streaming.api.functions.AssignerWithPunctuatedWatermarks;
-import org.apache.flink.streaming.api.functions.source.SourceFunction;
-import org.apache.flink.streaming.api.operators.StreamSource;
-import org.apache.flink.streaming.api.operators.StreamingRuntimeContext;
-import org.apache.flink.streaming.api.watermark.Watermark;
-import org.apache.flink.streaming.connectors.kafka.config.OffsetCommitMode;
-import org.apache.flink.streaming.connectors.kafka.internals.AbstractFetcher;
-import org.apache.flink.streaming.connectors.kafka.internals.KafkaTopicPartition;
-import org.apache.flink.streaming.connectors.kafka.internals.KafkaTopicPartitionStateSentinel;
-import org.apache.flink.streaming.runtime.tasks.OperatorStateHandles;
-import org.apache.flink.streaming.util.AbstractStreamOperatorTestHarness;
-import org.apache.flink.streaming.util.OperatorSnapshotUtil;
-import org.apache.flink.streaming.util.serialization.KeyedDeserializationSchema;
-import org.apache.flink.util.SerializedValue;
-
-import org.junit.Assert;
-import org.junit.Ignore;
-import org.junit.Test;
-import org.mockito.invocation.InvocationOnMock;
-import org.mockito.stubbing.Answer;
-
-import java.util.ArrayList;
-import java.util.Arrays;
-import java.util.Collections;
-import java.util.HashMap;
-import java.util.List;
-import java.util.Map;
-
-import static org.junit.Assert.assertTrue;
-import static org.mockito.Mockito.doAnswer;
-import static org.mockito.Mockito.mock;
-import static org.mockito.Mockito.when;
-
-/**
- * Tests for checking whether {@link FlinkKafkaConsumerBase} can restore from snapshots that
were
- * done using the Flink 1.2 {@link FlinkKafkaConsumerBase}.
- *
- * <p>For regenerating the binary snapshot files run {@link #writeSnapshot()} on the
Flink 1.2
- * branch.
- */
-public class FlinkKafkaConsumerBaseFrom12MigrationTest {
-
-	private static final HashMap<KafkaTopicPartition, Long> PARTITION_STATE = new HashMap<>();
-
-	static {
-		PARTITION_STATE.put(new KafkaTopicPartition("abc", 13), 16768L);
-		PARTITION_STATE.put(new KafkaTopicPartition("def", 7), 987654321L);
-	}
-
-	/**
-	 * Manually run this to write binary snapshot data.
-	 */
-	@Ignore
-	@Test
-	public void writeSnapshot() throws Exception {
-		writeSnapshot("src/test/resources/kafka-consumer-migration-test-flink1.2-snapshot", PARTITION_STATE);
-
-		final HashMap<KafkaTopicPartition, Long> emptyState = new HashMap<>();
-		writeSnapshot("src/test/resources/kafka-consumer-migration-test-flink1.2-empty-state-snapshot",
emptyState);
-	}
-
-	private void writeSnapshot(String path, HashMap<KafkaTopicPartition, Long> state)
throws Exception {
-
-		final OneShotLatch latch = new OneShotLatch();
-		final AbstractFetcher<String, ?> fetcher = mock(AbstractFetcher.class);
-
-		doAnswer(new Answer<Void>() {
-			@Override
-			public Void answer(InvocationOnMock invocation) throws Throwable {
-				latch.trigger();
-				return null;
-			}
-		}).when(fetcher).runFetchLoop();
-
-		when(fetcher.snapshotCurrentState()).thenReturn(state);
-
-		final List<KafkaTopicPartition> partitions = new ArrayList<>(PARTITION_STATE.keySet());
-
-		final DummyFlinkKafkaConsumer<String> consumerFunction = new DummyFlinkKafkaConsumer<>(fetcher,
partitions);
-
-		StreamSource<String, DummyFlinkKafkaConsumer<String>> consumerOperator =
-				new StreamSource<>(consumerFunction);
-
-		final AbstractStreamOperatorTestHarness<String> testHarness =
-				new AbstractStreamOperatorTestHarness<>(consumerOperator, 1, 1, 0);
-
-		testHarness.setTimeCharacteristic(TimeCharacteristic.ProcessingTime);
-
-		testHarness.setup();
-		testHarness.open();
-
-		final Throwable[] error = new Throwable[1];
-
-		// run the source asynchronously
-		Thread runner = new Thread() {
-			@Override
-			public void run() {
-				try {
-					consumerFunction.run(new DummySourceContext() {
-						@Override
-						public void collect(String element) {
-
-						}
-					});
-				}
-				catch (Throwable t) {
-					t.printStackTrace();
-					error[0] = t;
-				}
-			}
-		};
-		runner.start();
-
-		if (!latch.isTriggered()) {
-			latch.await();
-		}
-
-		final OperatorStateHandles snapshot;
-		synchronized (testHarness.getCheckpointLock()) {
-			snapshot = testHarness.snapshot(0L, 0L);
-		}
-
-		OperatorSnapshotUtil.writeStateHandle(snapshot, path);
-
-		consumerOperator.close();
-		runner.join();
-	}
-
-	/**
-	 * Test restoring from an legacy empty state, when no partitions could be found for topics.
-	 */
-	@Test
-	public void testRestoreFromEmptyStateNoPartitions() throws Exception {
-		final DummyFlinkKafkaConsumer<String> consumerFunction =
-				new DummyFlinkKafkaConsumer<>(Collections.<KafkaTopicPartition>emptyList());
-
-		StreamSource<String, DummyFlinkKafkaConsumer<String>> consumerOperator = new
StreamSource<>(consumerFunction);
-
-		final AbstractStreamOperatorTestHarness<String> testHarness =
-				new AbstractStreamOperatorTestHarness<>(consumerOperator, 1, 1, 0);
-
-		testHarness.setTimeCharacteristic(TimeCharacteristic.ProcessingTime);
-
-		testHarness.setup();
-		// restore state from binary snapshot file
-		testHarness.initializeState(
-				OperatorSnapshotUtil.readStateHandle(
-						OperatorSnapshotUtil.getResourceFilename("kafka-consumer-migration-test-flink1.2-empty-state-snapshot")));
-		testHarness.open();
-
-		// assert that no partitions were found and is empty
-		assertTrue(consumerFunction.getSubscribedPartitionsToStartOffsets() != null);
-		assertTrue(consumerFunction.getSubscribedPartitionsToStartOffsets().isEmpty());
-
-		// assert that no state was restored
-		assertTrue(consumerFunction.getRestoredState() == null);
-
-		consumerOperator.close();
-		consumerOperator.cancel();
-	}
-
-	/**
-	 * Test restoring from an empty state taken using Flink 1.2, when some partitions could
be
-	 * found for topics.
-	 */
-	@Test
-	public void testRestoreFromEmptyStateWithPartitions() throws Exception {
-		final List<KafkaTopicPartition> partitions = new ArrayList<>(PARTITION_STATE.keySet());
-
-		final DummyFlinkKafkaConsumer<String> consumerFunction = new DummyFlinkKafkaConsumer<>(partitions);
-
-		StreamSource<String, DummyFlinkKafkaConsumer<String>> consumerOperator =
-				new StreamSource<>(consumerFunction);
-
-		final AbstractStreamOperatorTestHarness<String> testHarness =
-				new AbstractStreamOperatorTestHarness<>(consumerOperator, 1, 1, 0);
-
-		testHarness.setTimeCharacteristic(TimeCharacteristic.ProcessingTime);
-
-		testHarness.setup();
-		// restore state from binary snapshot file
-		testHarness.initializeState(
-				OperatorSnapshotUtil.readStateHandle(
-						OperatorSnapshotUtil.getResourceFilename("kafka-consumer-migration-test-flink1.2-empty-state-snapshot")));
-		testHarness.open();
-
-		// the expected state in "kafka-consumer-migration-test-flink1.2-empty-state-snapshot";
-		// since the state is empty, the consumer should reflect on the startup mode to determine
start offsets.
-		final HashMap<KafkaTopicPartition, Long> expectedSubscribedPartitionsWithStartOffsets
= new HashMap<>();
-		for (KafkaTopicPartition partition : PARTITION_STATE.keySet()) {
-			expectedSubscribedPartitionsWithStartOffsets.put(partition, KafkaTopicPartitionStateSentinel.GROUP_OFFSET);
-		}
-
-		// assert that there are partitions and is identical to expected list
-		assertTrue(consumerFunction.getSubscribedPartitionsToStartOffsets() != null);
-		assertTrue(!consumerFunction.getSubscribedPartitionsToStartOffsets().isEmpty());
-		Assert.assertEquals(expectedSubscribedPartitionsWithStartOffsets, consumerFunction.getSubscribedPartitionsToStartOffsets());
-
-		assertTrue(consumerFunction.getRestoredState() == null);
-
-		consumerOperator.close();
-		consumerOperator.cancel();
-	}
-
-	/**
-	 * Test restoring from a non-empty state taken using Flink 1.2, when some partitions could
be
-	 * found for topics.
-	 */
-	@Test
-	public void testRestore() throws Exception {
-		final List<KafkaTopicPartition> partitions = new ArrayList<>(PARTITION_STATE.keySet());
-
-		final DummyFlinkKafkaConsumer<String> consumerFunction = new DummyFlinkKafkaConsumer<>(partitions);
-
-		StreamSource<String, DummyFlinkKafkaConsumer<String>> consumerOperator =
-				new StreamSource<>(consumerFunction);
-
-		final AbstractStreamOperatorTestHarness<String> testHarness =
-				new AbstractStreamOperatorTestHarness<>(consumerOperator, 1, 1, 0);
-
-		testHarness.setTimeCharacteristic(TimeCharacteristic.ProcessingTime);
-
-		testHarness.setup();
-		// restore state from binary snapshot file
-		testHarness.initializeState(
-				OperatorSnapshotUtil.readStateHandle(
-						OperatorSnapshotUtil.getResourceFilename("kafka-consumer-migration-test-flink1.2-snapshot")));
-		testHarness.open();
-
-		// assert that there are partitions and is identical to expected list
-		assertTrue(consumerFunction.getSubscribedPartitionsToStartOffsets() != null);
-		assertTrue(!consumerFunction.getSubscribedPartitionsToStartOffsets().isEmpty());
-
-		// on restore, subscribedPartitionsToStartOffsets should be identical to the restored state
-		Assert.assertEquals(PARTITION_STATE, consumerFunction.getSubscribedPartitionsToStartOffsets());
-
-		// assert that state is correctly restored from legacy checkpoint
-		assertTrue(consumerFunction.getRestoredState() != null);
-		Assert.assertEquals(PARTITION_STATE, consumerFunction.getRestoredState());
-
-		consumerOperator.close();
-		consumerOperator.cancel();
-	}
-
-	// ------------------------------------------------------------------------
-
-	private static class DummyFlinkKafkaConsumer<T> extends FlinkKafkaConsumerBase<T>
{
-		private static final long serialVersionUID = 1L;
-
-		private final List<KafkaTopicPartition> partitions;
-
-		private final AbstractFetcher<T, ?> fetcher;
-
-		@SuppressWarnings("unchecked")
-		DummyFlinkKafkaConsumer(AbstractFetcher<T, ?> fetcher, List<KafkaTopicPartition>
partitions) {
-			super(Arrays.asList("dummy-topic"), (KeyedDeserializationSchema< T >) mock(KeyedDeserializationSchema.class));
-			this.fetcher = fetcher;
-			this.partitions = partitions;
-		}
-
-		DummyFlinkKafkaConsumer(List<KafkaTopicPartition> partitions) {
-			super(Arrays.asList("dummy-topic"), (KeyedDeserializationSchema< T >) mock(KeyedDeserializationSchema.class));
-			this.fetcher = mock(AbstractFetcher.class);
-			this.partitions = partitions;
-		}
-
-		@Override
-		protected AbstractFetcher<T, ?> createFetcher(
-				SourceContext<T> sourceContext,
-				Map<KafkaTopicPartition, Long> thisSubtaskPartitionsWithStartOffsets,
-				SerializedValue<AssignerWithPeriodicWatermarks<T>> watermarksPeriodic,
-				SerializedValue<AssignerWithPunctuatedWatermarks<T>> watermarksPunctuated,
-				StreamingRuntimeContext runtimeContext,
-				OffsetCommitMode offsetCommitMode) throws Exception {
-			return fetcher;
-		}
-
-		@Override
-		protected List<KafkaTopicPartition> getKafkaPartitions(List<String> topics)
{
-			return partitions;
-		}
-
-		@Override
-		protected boolean getIsAutoCommitEnabled() {
-			return false;
-		}
-	}
-
-	private abstract static class DummySourceContext
-			implements SourceFunction.SourceContext<String> {
-
-		private final Object lock = new Object();
-
-		@Override
-		public void collectWithTimestamp(String element, long timestamp) {
-		}
-
-		@Override
-		public void emitWatermark(Watermark mark) {
-		}
-
-		@Override
-		public Object getCheckpointLock() {
-			return lock;
-		}
-
-		@Override
-		public void close() {
-		}
-
-		@Override
-		public void markAsTemporarilyIdle() {
-
-		}
-	}
-}

http://git-wip-us.apache.org/repos/asf/flink/blob/e9688632/flink-connectors/flink-connector-kafka-base/src/test/java/org/apache/flink/streaming/connectors/kafka/FlinkKafkaConsumerBaseMigrationTest.java
----------------------------------------------------------------------
diff --git a/flink-connectors/flink-connector-kafka-base/src/test/java/org/apache/flink/streaming/connectors/kafka/FlinkKafkaConsumerBaseMigrationTest.java
b/flink-connectors/flink-connector-kafka-base/src/test/java/org/apache/flink/streaming/connectors/kafka/FlinkKafkaConsumerBaseMigrationTest.java
new file mode 100644
index 0000000..692dc1d
--- /dev/null
+++ b/flink-connectors/flink-connector-kafka-base/src/test/java/org/apache/flink/streaming/connectors/kafka/FlinkKafkaConsumerBaseMigrationTest.java
@@ -0,0 +1,374 @@
+/*
+ * 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.flink.streaming.connectors.kafka;
+
+import org.apache.flink.core.testutils.OneShotLatch;
+import org.apache.flink.streaming.api.TimeCharacteristic;
+import org.apache.flink.streaming.api.functions.AssignerWithPeriodicWatermarks;
+import org.apache.flink.streaming.api.functions.AssignerWithPunctuatedWatermarks;
+import org.apache.flink.streaming.api.functions.source.SourceFunction;
+import org.apache.flink.streaming.api.operators.StreamSource;
+import org.apache.flink.streaming.api.operators.StreamingRuntimeContext;
+import org.apache.flink.streaming.api.watermark.Watermark;
+import org.apache.flink.streaming.connectors.kafka.config.OffsetCommitMode;
+import org.apache.flink.streaming.connectors.kafka.internals.AbstractFetcher;
+import org.apache.flink.streaming.connectors.kafka.internals.KafkaTopicPartition;
+import org.apache.flink.streaming.connectors.kafka.internals.KafkaTopicPartitionStateSentinel;
+import org.apache.flink.streaming.runtime.tasks.OperatorStateHandles;
+import org.apache.flink.streaming.util.AbstractStreamOperatorTestHarness;
+import org.apache.flink.streaming.util.OperatorSnapshotUtil;
+import org.apache.flink.streaming.util.migration.MigrationTestUtil;
+import org.apache.flink.streaming.util.migration.MigrationVersion;
+import org.apache.flink.streaming.util.serialization.KeyedDeserializationSchema;
+import org.apache.flink.util.SerializedValue;
+
+import org.junit.Assert;
+import org.junit.Ignore;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.Parameterized;
+import org.mockito.invocation.InvocationOnMock;
+import org.mockito.stubbing.Answer;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+import static org.junit.Assert.assertTrue;
+import static org.mockito.Mockito.doAnswer;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.when;
+
+/**
+ * Tests for checking whether {@link FlinkKafkaConsumerBase} can restore from snapshots that
were
+ * done using previous Flink versions' {@link FlinkKafkaConsumerBase}.
+ *
+ * <p>For regenerating the binary snapshot files run {@link #writeSnapshot()} on the
corresponding
+ * Flink release-* branch.
+ */
+@RunWith(Parameterized.class)
+public class FlinkKafkaConsumerBaseMigrationTest {
+
+	/**
+	 * TODO change this to the corresponding savepoint version to be written (e.g. {@link MigrationVersion#v1_3}
for 1.3)
+	 * TODO and remove all @Ignore annotations on write*Snapshot() methods to generate savepoints
+	 */
+	private final MigrationVersion flinkGenerateSavepointVersion = null;
+
+	private static final HashMap<KafkaTopicPartition, Long> PARTITION_STATE = new HashMap<>();
+
+	static {
+		PARTITION_STATE.put(new KafkaTopicPartition("abc", 13), 16768L);
+		PARTITION_STATE.put(new KafkaTopicPartition("def", 7), 987654321L);
+	}
+
+	private final MigrationVersion testMigrateVersion;
+
+	@Parameterized.Parameters(name = "Migration Savepoint: {0}")
+	public static Collection<MigrationVersion> parameters () {
+		return Arrays.asList(MigrationVersion.v1_1, MigrationVersion.v1_2, MigrationVersion.v1_3);
+	}
+
+	public FlinkKafkaConsumerBaseMigrationTest(MigrationVersion testMigrateVersion) {
+		this.testMigrateVersion = testMigrateVersion;
+	}
+
+	/**
+	 * Manually run this to write binary snapshot data.
+	 */
+	@Ignore
+	@Test
+	public void writeSnapshot() throws Exception {
+		writeSnapshot("src/test/resources/kafka-consumer-migration-test-flink" + flinkGenerateSavepointVersion
+ "-snapshot", PARTITION_STATE);
+
+		final HashMap<KafkaTopicPartition, Long> emptyState = new HashMap<>();
+		writeSnapshot("src/test/resources/kafka-consumer-migration-test-flink" + flinkGenerateSavepointVersion
+ "-empty-state-snapshot", emptyState);
+	}
+
+	private void writeSnapshot(String path, HashMap<KafkaTopicPartition, Long> state)
throws Exception {
+
+		final OneShotLatch latch = new OneShotLatch();
+		final AbstractFetcher<String, ?> fetcher = mock(AbstractFetcher.class);
+
+		doAnswer(new Answer<Void>() {
+			@Override
+			public Void answer(InvocationOnMock invocation) throws Throwable {
+				latch.trigger();
+				return null;
+			}
+		}).when(fetcher).runFetchLoop();
+
+		when(fetcher.snapshotCurrentState()).thenReturn(state);
+
+		final List<KafkaTopicPartition> partitions = new ArrayList<>(PARTITION_STATE.keySet());
+
+		final DummyFlinkKafkaConsumer<String> consumerFunction = new DummyFlinkKafkaConsumer<>(fetcher,
partitions);
+
+		StreamSource<String, DummyFlinkKafkaConsumer<String>> consumerOperator =
+				new StreamSource<>(consumerFunction);
+
+		final AbstractStreamOperatorTestHarness<String> testHarness =
+				new AbstractStreamOperatorTestHarness<>(consumerOperator, 1, 1, 0);
+
+		testHarness.setTimeCharacteristic(TimeCharacteristic.ProcessingTime);
+
+		testHarness.setup();
+		testHarness.open();
+
+		final Throwable[] error = new Throwable[1];
+
+		// run the source asynchronously
+		Thread runner = new Thread() {
+			@Override
+			public void run() {
+				try {
+					consumerFunction.run(new DummySourceContext() {
+						@Override
+						public void collect(String element) {
+
+						}
+					});
+				}
+				catch (Throwable t) {
+					t.printStackTrace();
+					error[0] = t;
+				}
+			}
+		};
+		runner.start();
+
+		if (!latch.isTriggered()) {
+			latch.await();
+		}
+
+		final OperatorStateHandles snapshot;
+		synchronized (testHarness.getCheckpointLock()) {
+			snapshot = testHarness.snapshot(0L, 0L);
+		}
+
+		OperatorSnapshotUtil.writeStateHandle(snapshot, path);
+
+		consumerOperator.close();
+		runner.join();
+	}
+
+	/**
+	 * Test restoring from an legacy empty state, when no partitions could be found for topics.
+	 */
+	@Test
+	public void testRestoreFromEmptyStateNoPartitions() throws Exception {
+		final DummyFlinkKafkaConsumer<String> consumerFunction =
+				new DummyFlinkKafkaConsumer<>(Collections.<KafkaTopicPartition>emptyList());
+
+		StreamSource<String, DummyFlinkKafkaConsumer<String>> consumerOperator = new
StreamSource<>(consumerFunction);
+
+		final AbstractStreamOperatorTestHarness<String> testHarness =
+				new AbstractStreamOperatorTestHarness<>(consumerOperator, 1, 1, 0);
+
+		testHarness.setTimeCharacteristic(TimeCharacteristic.ProcessingTime);
+
+		testHarness.setup();
+
+		// restore state from binary snapshot file
+		MigrationTestUtil.restoreFromSnapshot(
+			testHarness,
+			OperatorSnapshotUtil.getResourceFilename(
+				"kafka-consumer-migration-test-flink" + testMigrateVersion + "-empty-state-snapshot"),
+			testMigrateVersion);
+
+		testHarness.open();
+
+		// assert that no partitions were found and is empty
+		assertTrue(consumerFunction.getSubscribedPartitionsToStartOffsets() != null);
+		assertTrue(consumerFunction.getSubscribedPartitionsToStartOffsets().isEmpty());
+
+		// assert that no state was restored
+		assertTrue(consumerFunction.getRestoredState() == null);
+
+		consumerOperator.close();
+		consumerOperator.cancel();
+	}
+
+	/**
+	 * Test restoring from an empty state taken using a previous Flink version, when some partitions
could be
+	 * found for topics.
+	 */
+	@Test
+	public void testRestoreFromEmptyStateWithPartitions() throws Exception {
+		final List<KafkaTopicPartition> partitions = new ArrayList<>(PARTITION_STATE.keySet());
+
+		final DummyFlinkKafkaConsumer<String> consumerFunction = new DummyFlinkKafkaConsumer<>(partitions);
+
+		StreamSource<String, DummyFlinkKafkaConsumer<String>> consumerOperator =
+				new StreamSource<>(consumerFunction);
+
+		final AbstractStreamOperatorTestHarness<String> testHarness =
+				new AbstractStreamOperatorTestHarness<>(consumerOperator, 1, 1, 0);
+
+		testHarness.setTimeCharacteristic(TimeCharacteristic.ProcessingTime);
+
+		testHarness.setup();
+
+		// restore state from binary snapshot file
+		MigrationTestUtil.restoreFromSnapshot(
+			testHarness,
+			OperatorSnapshotUtil.getResourceFilename(
+				"kafka-consumer-migration-test-flink" + testMigrateVersion + "-empty-state-snapshot"),
+			testMigrateVersion);
+
+		testHarness.open();
+
+		// the expected state in "kafka-consumer-migration-test-flink*-empty-state-snapshot";
+		// since the state is empty, the consumer should reflect on the startup mode to determine
start offsets.
+		final HashMap<KafkaTopicPartition, Long> expectedSubscribedPartitionsWithStartOffsets
= new HashMap<>();
+		for (KafkaTopicPartition partition : PARTITION_STATE.keySet()) {
+			expectedSubscribedPartitionsWithStartOffsets.put(partition, KafkaTopicPartitionStateSentinel.GROUP_OFFSET);
+		}
+
+		// assert that there are partitions and is identical to expected list
+		assertTrue(consumerFunction.getSubscribedPartitionsToStartOffsets() != null);
+		assertTrue(!consumerFunction.getSubscribedPartitionsToStartOffsets().isEmpty());
+		Assert.assertEquals(expectedSubscribedPartitionsWithStartOffsets, consumerFunction.getSubscribedPartitionsToStartOffsets());
+
+		assertTrue(consumerFunction.getRestoredState() == null);
+
+		consumerOperator.close();
+		consumerOperator.cancel();
+	}
+
+	/**
+	 * Test restoring from a non-empty state taken using a previous Flink version, when some
partitions could be
+	 * found for topics.
+	 */
+	@Test
+	public void testRestore() throws Exception {
+		final List<KafkaTopicPartition> partitions = new ArrayList<>(PARTITION_STATE.keySet());
+
+		final DummyFlinkKafkaConsumer<String> consumerFunction = new DummyFlinkKafkaConsumer<>(partitions);
+
+		StreamSource<String, DummyFlinkKafkaConsumer<String>> consumerOperator =
+				new StreamSource<>(consumerFunction);
+
+		final AbstractStreamOperatorTestHarness<String> testHarness =
+				new AbstractStreamOperatorTestHarness<>(consumerOperator, 1, 1, 0);
+
+		testHarness.setTimeCharacteristic(TimeCharacteristic.ProcessingTime);
+
+		testHarness.setup();
+
+		// restore state from binary snapshot file
+		MigrationTestUtil.restoreFromSnapshot(
+			testHarness,
+			OperatorSnapshotUtil.getResourceFilename(
+				"kafka-consumer-migration-test-flink" + testMigrateVersion + "-snapshot"),
+			testMigrateVersion);
+
+		testHarness.open();
+
+		// assert that there are partitions and is identical to expected list
+		assertTrue(consumerFunction.getSubscribedPartitionsToStartOffsets() != null);
+		assertTrue(!consumerFunction.getSubscribedPartitionsToStartOffsets().isEmpty());
+
+		// on restore, subscribedPartitionsToStartOffsets should be identical to the restored state
+		Assert.assertEquals(PARTITION_STATE, consumerFunction.getSubscribedPartitionsToStartOffsets());
+
+		// assert that state is correctly restored from legacy checkpoint
+		assertTrue(consumerFunction.getRestoredState() != null);
+		Assert.assertEquals(PARTITION_STATE, consumerFunction.getRestoredState());
+
+		consumerOperator.close();
+		consumerOperator.cancel();
+	}
+
+	// ------------------------------------------------------------------------
+
+	private static class DummyFlinkKafkaConsumer<T> extends FlinkKafkaConsumerBase<T>
{
+		private static final long serialVersionUID = 1L;
+
+		private final List<KafkaTopicPartition> partitions;
+
+		private final AbstractFetcher<T, ?> fetcher;
+
+		@SuppressWarnings("unchecked")
+		DummyFlinkKafkaConsumer(AbstractFetcher<T, ?> fetcher, List<KafkaTopicPartition>
partitions) {
+			super(Arrays.asList("dummy-topic"), (KeyedDeserializationSchema< T >) mock(KeyedDeserializationSchema.class));
+			this.fetcher = fetcher;
+			this.partitions = partitions;
+		}
+
+		DummyFlinkKafkaConsumer(List<KafkaTopicPartition> partitions) {
+			super(Arrays.asList("dummy-topic"), (KeyedDeserializationSchema< T >) mock(KeyedDeserializationSchema.class));
+			this.fetcher = mock(AbstractFetcher.class);
+			this.partitions = partitions;
+		}
+
+		@Override
+		protected AbstractFetcher<T, ?> createFetcher(
+				SourceContext<T> sourceContext,
+				Map<KafkaTopicPartition, Long> thisSubtaskPartitionsWithStartOffsets,
+				SerializedValue<AssignerWithPeriodicWatermarks<T>> watermarksPeriodic,
+				SerializedValue<AssignerWithPunctuatedWatermarks<T>> watermarksPunctuated,
+				StreamingRuntimeContext runtimeContext,
+				OffsetCommitMode offsetCommitMode) throws Exception {
+			return fetcher;
+		}
+
+		@Override
+		protected List<KafkaTopicPartition> getKafkaPartitions(List<String> topics)
{
+			return partitions;
+		}
+
+		@Override
+		protected boolean getIsAutoCommitEnabled() {
+			return false;
+		}
+	}
+
+	private abstract static class DummySourceContext
+			implements SourceFunction.SourceContext<String> {
+
+		private final Object lock = new Object();
+
+		@Override
+		public void collectWithTimestamp(String element, long timestamp) {
+		}
+
+		@Override
+		public void emitWatermark(Watermark mark) {
+		}
+
+		@Override
+		public Object getCheckpointLock() {
+			return lock;
+		}
+
+		@Override
+		public void close() {
+		}
+
+		@Override
+		public void markAsTemporarilyIdle() {
+
+		}
+	}
+}

http://git-wip-us.apache.org/repos/asf/flink/blob/e9688632/flink-connectors/flink-connector-kafka-base/src/test/resources/kafka-consumer-migration-test-flink1.3-empty-state-snapshot
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diff --git a/flink-connectors/flink-connector-kafka-base/src/test/resources/kafka-consumer-migration-test-flink1.3-snapshot
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