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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-8453) Add SerializableExecutionGraphStore to Dispatcher
Date Thu, 25 Jan 2018 18:08:00 GMT

    [ https://issues.apache.org/jira/browse/FLINK-8453?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16339572#comment-16339572
] 

ASF GitHub Bot commented on FLINK-8453:
---------------------------------------

Github user GJL commented on a diff in the pull request:

    https://github.com/apache/flink/pull/5310#discussion_r163919241
  
    --- Diff: flink-runtime/src/test/java/org/apache/flink/runtime/dispatcher/FileArchivedExecutionGraphStoreTest.java
---
    @@ -0,0 +1,319 @@
    +/*
    + * 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.runtime.dispatcher;
    +
    +import org.apache.flink.api.common.JobID;
    +import org.apache.flink.api.common.time.Time;
    +import org.apache.flink.runtime.concurrent.ManuallyTriggeredScheduledExecutor;
    +import org.apache.flink.runtime.executiongraph.ArchivedExecutionGraph;
    +import org.apache.flink.runtime.jobgraph.JobStatus;
    +import org.apache.flink.runtime.messages.webmonitor.JobDetails;
    +import org.apache.flink.runtime.messages.webmonitor.JobsOverview;
    +import org.apache.flink.runtime.rest.handler.legacy.utils.ArchivedExecutionGraphBuilder;
    +import org.apache.flink.runtime.testingUtils.TestingUtils;
    +import org.apache.flink.runtime.webmonitor.WebMonitorUtils;
    +import org.apache.flink.testutils.category.Flip6;
    +import org.apache.flink.util.Preconditions;
    +import org.apache.flink.util.TestLogger;
    +
    +import org.apache.flink.shaded.guava18.com.google.common.cache.LoadingCache;
    +
    +import org.hamcrest.BaseMatcher;
    +import org.hamcrest.Description;
    +import org.hamcrest.Matchers;
    +import org.junit.BeforeClass;
    +import org.junit.ClassRule;
    +import org.junit.Test;
    +import org.junit.experimental.categories.Category;
    +import org.junit.rules.TemporaryFolder;
    +
    +import java.io.File;
    +import java.io.IOException;
    +import java.util.ArrayList;
    +import java.util.Collection;
    +import java.util.List;
    +import java.util.Objects;
    +import java.util.Random;
    +import java.util.stream.Collectors;
    +
    +import static org.junit.Assert.assertThat;
    +
    +/**
    + * Tests for the {@link FileArchivedExecutionGraphStore}.
    + */
    +@Category(Flip6.class)
    +public class FileArchivedExecutionGraphStoreTest extends TestLogger {
    +
    +	private static final List<JobStatus> GLOBALLY_TERMINAL_JOB_STATUS = new ArrayList<>(3);
    +
    +	private static final Random RANDOM = new Random();
    --- End diff --
    
    With `ThreadLocalRandom.current().nextInt(...)` you already have an available random instance
which does not suffer from lock contention problems.


> Add SerializableExecutionGraphStore to Dispatcher
> -------------------------------------------------
>
>                 Key: FLINK-8453
>                 URL: https://issues.apache.org/jira/browse/FLINK-8453
>             Project: Flink
>          Issue Type: Improvement
>          Components: Distributed Coordination, REST
>    Affects Versions: 1.5.0
>            Reporter: Till Rohrmann
>            Assignee: Till Rohrmann
>            Priority: Major
>              Labels: flip-6
>             Fix For: 1.5.0
>
>
> The {{Dispatcher}} should have a {{SerializableExecutionGraphStore}} which it can use
to store completed jobs. This store can then be used to serve historic job requests from the
web UI, for example. The default implementation should persist the jobs to disk and evict
the in memory instances once they grow to big in order to avoid memory leaks. Additionally,
the store should expire elements from disk after a user defined time.



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