Hadoop Map/Reduce
  1. Hadoop Map/Reduce
  2. MAPREDUCE-4228

mapreduce.job.reduce.slowstart.completedmaps is not working properly to delay the scheduling of the reduce tasks

    Details

      Description

      If no more map tasks need to be scheduled but not all have completed, the ApplicationMaster will start scheduling reducers even if the number of completed maps has not met the mapreduce.job.reduce.slowstart.completedmaps threshold. For example, if the property is set to 1.0 all maps should complete before any reducers are scheduled. However the reducers are scheduled as soon as the last map task is assigned to a container. For a job with very long-running maps, a cluster with enough capacity to launch all map tasks could cause reducers to launch prematurely and waste cluster resources.

      Thanks to Phil Su for discovering this issue.

      1. MAPREDUCE-4228.patch
        10 kB
        Jason Lowe
      2. MAPREDUCE-4228.patch
        10 kB
        Jason Lowe
      3. MAPREDUCE-4228.patch
        10 kB
        Jason Lowe

        Activity

        Hide
        alex gemini added a comment -

        It's a little confusing,if mapreduce.job.reduce.slowstart.completedmaps didn't control when reduce will start scheduling,should we just remove this parameter? or maybe change name to mapreduce.job.reduce.slowstart.startedmaps?

        Show
        alex gemini added a comment - It's a little confusing,if mapreduce.job.reduce.slowstart.completedmaps didn't control when reduce will start scheduling,should we just remove this parameter? or maybe change name to mapreduce.job.reduce.slowstart.startedmaps?
        Hide
        Jason Lowe added a comment -

        As I understand it, this functionality works properly in Hadoop 1.0, so that reducers do not start until the requisite number of map tasks have completed. In 0.23/2.0 that's not the case, and we need to correct that behavior rather than rename existing properties to match an undesired behavior.

        Show
        Jason Lowe added a comment - As I understand it, this functionality works properly in Hadoop 1.0, so that reducers do not start until the requisite number of map tasks have completed. In 0.23/2.0 that's not the case, and we need to correct that behavior rather than rename existing properties to match an undesired behavior.
        Hide
        alex gemini added a comment -

        this is mainly for small jobs,isn't it?the time frame between started map and completed map job will affect the small job's latency,if that's the case,why not just remove this parameter,what's the difference if we set it to 0.33 and 1.0?we didn't prevent other reduce to locate,isn't it?

        Show
        alex gemini added a comment - this is mainly for small jobs,isn't it?the time frame between started map and completed map job will affect the small job's latency,if that's the case,why not just remove this parameter,what's the difference if we set it to 0.33 and 1.0?we didn't prevent other reduce to locate,isn't it?
        Hide
        Robert Joseph Evans added a comment -

        This is mostly about the utilization of the cluster. In many cases you have a map/reduce job where the mappers take a very long time. If you don't wait until all of the mappers have finished there are many many reducers taking up resources doing nothing waiting for the mappers to finish. In some cases we have seen this last from several hours up to a day or two.

        Show
        Robert Joseph Evans added a comment - This is mostly about the utilization of the cluster. In many cases you have a map/reduce job where the mappers take a very long time. If you don't wait until all of the mappers have finished there are many many reducers taking up resources doing nothing waiting for the mappers to finish. In some cases we have seen this last from several hours up to a day or two.
        Hide
        Jason Lowe added a comment -

        Patch to verify we've met the slowstart criteria before unleashing all reducers once all maps have been assigned.

        Besides the automated tests that were added/modified, I also ran manual tests on a local cluster with sleep and wordcount jobs.

        Show
        Jason Lowe added a comment - Patch to verify we've met the slowstart criteria before unleashing all reducers once all maps have been assigned. Besides the automated tests that were added/modified, I also ran manual tests on a local cluster with sleep and wordcount jobs.
        Hide
        Hadoop QA added a comment -

        -1 overall. Here are the results of testing the latest attachment
        http://issues.apache.org/jira/secure/attachment/12525892/MAPREDUCE-4228.patch
        against trunk revision .

        +1 @author. The patch does not contain any @author tags.

        +1 tests included. The patch appears to include 1 new or modified test files.

        -1 javadoc. The javadoc tool appears to have generated 2 warning messages.

        +1 javac. The applied patch does not increase the total number of javac compiler warnings.

        +1 eclipse:eclipse. The patch built with eclipse:eclipse.

        +1 findbugs. The patch does not introduce any new Findbugs (version 1.3.9) warnings.

        +1 release audit. The applied patch does not increase the total number of release audit warnings.

        +1 core tests. The patch passed unit tests in hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app.

        +1 contrib tests. The patch passed contrib unit tests.

        Test results: https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/2362//testReport/
        Console output: https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/2362//console

        This message is automatically generated.

        Show
        Hadoop QA added a comment - -1 overall. Here are the results of testing the latest attachment http://issues.apache.org/jira/secure/attachment/12525892/MAPREDUCE-4228.patch against trunk revision . +1 @author. The patch does not contain any @author tags. +1 tests included. The patch appears to include 1 new or modified test files. -1 javadoc. The javadoc tool appears to have generated 2 warning messages. +1 javac. The applied patch does not increase the total number of javac compiler warnings. +1 eclipse:eclipse. The patch built with eclipse:eclipse. +1 findbugs. The patch does not introduce any new Findbugs (version 1.3.9) warnings. +1 release audit. The applied patch does not increase the total number of release audit warnings. +1 core tests. The patch passed unit tests in hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app. +1 contrib tests. The patch passed contrib unit tests. Test results: https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/2362//testReport/ Console output: https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/2362//console This message is automatically generated.
        Hide
        Jason Lowe added a comment -

        Minor patch update to add Private annotation on scheduleAllReduces() which was made public for testing.

        Show
        Jason Lowe added a comment - Minor patch update to add Private annotation on scheduleAllReduces() which was made public for testing.
        Hide
        Hadoop QA added a comment -

        -1 overall. Here are the results of testing the latest attachment
        http://issues.apache.org/jira/secure/attachment/12525912/MAPREDUCE-4228.patch
        against trunk revision .

        +1 @author. The patch does not contain any @author tags.

        +1 tests included. The patch appears to include 1 new or modified test files.

        -1 javadoc. The javadoc tool appears to have generated 2 warning messages.

        +1 javac. The applied patch does not increase the total number of javac compiler warnings.

        +1 eclipse:eclipse. The patch built with eclipse:eclipse.

        -1 findbugs. The patch appears to cause Findbugs (version 1.3.9) to fail.

        +1 release audit. The applied patch does not increase the total number of release audit warnings.

        +1 core tests. The patch passed unit tests in hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app.

        +1 contrib tests. The patch passed contrib unit tests.

        Test results: https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/2365//testReport/
        Console output: https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/2365//console

        This message is automatically generated.

        Show
        Hadoop QA added a comment - -1 overall. Here are the results of testing the latest attachment http://issues.apache.org/jira/secure/attachment/12525912/MAPREDUCE-4228.patch against trunk revision . +1 @author. The patch does not contain any @author tags. +1 tests included. The patch appears to include 1 new or modified test files. -1 javadoc. The javadoc tool appears to have generated 2 warning messages. +1 javac. The applied patch does not increase the total number of javac compiler warnings. +1 eclipse:eclipse. The patch built with eclipse:eclipse. -1 findbugs. The patch appears to cause Findbugs (version 1.3.9) to fail. +1 release audit. The applied patch does not increase the total number of release audit warnings. +1 core tests. The patch passed unit tests in hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app. +1 contrib tests. The patch passed contrib unit tests. Test results: https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/2365//testReport/ Console output: https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/2365//console This message is automatically generated.
        Hide
        Jason Lowe added a comment -

        The javadoc warnings are unrelated. Not sure why findbugs failed, as it ran just fine for me locally (and on the first patch version). Output from my local run:

        -1 overall.

        +1 @author. The patch does not contain any @author tags.

        +1 tests included. The patch appears to include 1 new or modified test files.

        -1 javadoc. The javadoc tool appears to have generated 2 warning messages.

        +1 javac. The applied patch does not increase the total number of javac compiler warnings.

        +1 eclipse:eclipse. The patch built with eclipse:eclipse.

        +1 findbugs. The patch does not introduce any new Findbugs (version ) warnings.

        +1 release audit. The applied patch does not increase the total number of release audit warnings.

        Show
        Jason Lowe added a comment - The javadoc warnings are unrelated. Not sure why findbugs failed, as it ran just fine for me locally (and on the first patch version). Output from my local run: -1 overall. +1 @author. The patch does not contain any @author tags. +1 tests included. The patch appears to include 1 new or modified test files. -1 javadoc. The javadoc tool appears to have generated 2 warning messages. +1 javac. The applied patch does not increase the total number of javac compiler warnings. +1 eclipse:eclipse. The patch built with eclipse:eclipse. +1 findbugs. The patch does not introduce any new Findbugs (version ) warnings. +1 release audit. The applied patch does not increase the total number of release audit warnings.
        Hide
        Jason Lowe added a comment -

        Upmerged patch to latest changes on trunk.

        Show
        Jason Lowe added a comment - Upmerged patch to latest changes on trunk.
        Hide
        Hadoop QA added a comment -

        -1 overall. Here are the results of testing the latest attachment
        http://issues.apache.org/jira/secure/attachment/12532955/MAPREDUCE-4228.patch
        against trunk revision .

        +1 @author. The patch does not contain any @author tags.

        +1 tests included. The patch appears to include 1 new or modified test files.

        +1 javac. The applied patch does not increase the total number of javac compiler warnings.

        -1 javadoc. The javadoc tool appears to have generated 13 warning messages.

        +1 eclipse:eclipse. The patch built with eclipse:eclipse.

        +1 findbugs. The patch does not introduce any new Findbugs (version 1.3.9) warnings.

        +1 release audit. The applied patch does not increase the total number of release audit warnings.

        +1 core tests. The patch passed unit tests in hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app.

        +1 contrib tests. The patch passed contrib unit tests.

        Test results: https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/2494//testReport/
        Console output: https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/2494//console

        This message is automatically generated.

        Show
        Hadoop QA added a comment - -1 overall. Here are the results of testing the latest attachment http://issues.apache.org/jira/secure/attachment/12532955/MAPREDUCE-4228.patch against trunk revision . +1 @author. The patch does not contain any @author tags. +1 tests included. The patch appears to include 1 new or modified test files. +1 javac. The applied patch does not increase the total number of javac compiler warnings. -1 javadoc. The javadoc tool appears to have generated 13 warning messages. +1 eclipse:eclipse. The patch built with eclipse:eclipse. +1 findbugs. The patch does not introduce any new Findbugs (version 1.3.9) warnings. +1 release audit. The applied patch does not increase the total number of release audit warnings. +1 core tests. The patch passed unit tests in hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app. +1 contrib tests. The patch passed contrib unit tests. Test results: https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/2494//testReport/ Console output: https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/2494//console This message is automatically generated.
        Hide
        Jason Lowe added a comment -

        Javadoc warnings are a known issue. See HDFS-3550.

        Show
        Jason Lowe added a comment - Javadoc warnings are a known issue. See HDFS-3550 .
        Hide
        Robert Joseph Evans added a comment -

        Thanks Jason the changes look good to me +1.

        Show
        Robert Joseph Evans added a comment - Thanks Jason the changes look good to me +1.
        Hide
        Robert Joseph Evans added a comment -

        Thanks for the patch Jason,

        I have put this into trunk, branch-2, and branch-0.23.

        Show
        Robert Joseph Evans added a comment - Thanks for the patch Jason, I have put this into trunk, branch-2, and branch-0.23.
        Hide
        Hudson added a comment -

        Integrated in Hadoop-Common-trunk-Commit #2391 (See https://builds.apache.org/job/Hadoop-Common-trunk-Commit/2391/)
        MAPREDUCE-4228. mapreduce.job.reduce.slowstart.completedmaps is not working properly (Jason Lowe via bobby) (Revision 1354181)

        Result = SUCCESS
        bobby : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1354181
        Files :

        • /hadoop/common/trunk/hadoop-mapreduce-project/CHANGES.txt
        • /hadoop/common/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app/src/main/java/org/apache/hadoop/mapreduce/v2/app/rm/RMContainerAllocator.java
        • /hadoop/common/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app/src/test/java/org/apache/hadoop/mapreduce/v2/app/TestRMContainerAllocator.java
        Show
        Hudson added a comment - Integrated in Hadoop-Common-trunk-Commit #2391 (See https://builds.apache.org/job/Hadoop-Common-trunk-Commit/2391/ ) MAPREDUCE-4228 . mapreduce.job.reduce.slowstart.completedmaps is not working properly (Jason Lowe via bobby) (Revision 1354181) Result = SUCCESS bobby : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1354181 Files : /hadoop/common/trunk/hadoop-mapreduce-project/CHANGES.txt /hadoop/common/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app/src/main/java/org/apache/hadoop/mapreduce/v2/app/rm/RMContainerAllocator.java /hadoop/common/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app/src/test/java/org/apache/hadoop/mapreduce/v2/app/TestRMContainerAllocator.java
        Hide
        Hudson added a comment -

        Integrated in Hadoop-Hdfs-trunk-Commit #2460 (See https://builds.apache.org/job/Hadoop-Hdfs-trunk-Commit/2460/)
        MAPREDUCE-4228. mapreduce.job.reduce.slowstart.completedmaps is not working properly (Jason Lowe via bobby) (Revision 1354181)

        Result = SUCCESS
        bobby : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1354181
        Files :

        • /hadoop/common/trunk/hadoop-mapreduce-project/CHANGES.txt
        • /hadoop/common/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app/src/main/java/org/apache/hadoop/mapreduce/v2/app/rm/RMContainerAllocator.java
        • /hadoop/common/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app/src/test/java/org/apache/hadoop/mapreduce/v2/app/TestRMContainerAllocator.java
        Show
        Hudson added a comment - Integrated in Hadoop-Hdfs-trunk-Commit #2460 (See https://builds.apache.org/job/Hadoop-Hdfs-trunk-Commit/2460/ ) MAPREDUCE-4228 . mapreduce.job.reduce.slowstart.completedmaps is not working properly (Jason Lowe via bobby) (Revision 1354181) Result = SUCCESS bobby : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1354181 Files : /hadoop/common/trunk/hadoop-mapreduce-project/CHANGES.txt /hadoop/common/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app/src/main/java/org/apache/hadoop/mapreduce/v2/app/rm/RMContainerAllocator.java /hadoop/common/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app/src/test/java/org/apache/hadoop/mapreduce/v2/app/TestRMContainerAllocator.java
        Hide
        Hudson added a comment -

        Integrated in Hadoop-Mapreduce-trunk-Commit #2410 (See https://builds.apache.org/job/Hadoop-Mapreduce-trunk-Commit/2410/)
        MAPREDUCE-4228. mapreduce.job.reduce.slowstart.completedmaps is not working properly (Jason Lowe via bobby) (Revision 1354181)

        Result = FAILURE
        bobby : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1354181
        Files :

        • /hadoop/common/trunk/hadoop-mapreduce-project/CHANGES.txt
        • /hadoop/common/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app/src/main/java/org/apache/hadoop/mapreduce/v2/app/rm/RMContainerAllocator.java
        • /hadoop/common/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app/src/test/java/org/apache/hadoop/mapreduce/v2/app/TestRMContainerAllocator.java
        Show
        Hudson added a comment - Integrated in Hadoop-Mapreduce-trunk-Commit #2410 (See https://builds.apache.org/job/Hadoop-Mapreduce-trunk-Commit/2410/ ) MAPREDUCE-4228 . mapreduce.job.reduce.slowstart.completedmaps is not working properly (Jason Lowe via bobby) (Revision 1354181) Result = FAILURE bobby : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1354181 Files : /hadoop/common/trunk/hadoop-mapreduce-project/CHANGES.txt /hadoop/common/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app/src/main/java/org/apache/hadoop/mapreduce/v2/app/rm/RMContainerAllocator.java /hadoop/common/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app/src/test/java/org/apache/hadoop/mapreduce/v2/app/TestRMContainerAllocator.java
        Hide
        Hudson added a comment -

        Integrated in Hadoop-Hdfs-trunk #1089 (See https://builds.apache.org/job/Hadoop-Hdfs-trunk/1089/)
        MAPREDUCE-4228. mapreduce.job.reduce.slowstart.completedmaps is not working properly (Jason Lowe via bobby) (Revision 1354181)

        Result = FAILURE
        bobby : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1354181
        Files :

        • /hadoop/common/trunk/hadoop-mapreduce-project/CHANGES.txt
        • /hadoop/common/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app/src/main/java/org/apache/hadoop/mapreduce/v2/app/rm/RMContainerAllocator.java
        • /hadoop/common/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app/src/test/java/org/apache/hadoop/mapreduce/v2/app/TestRMContainerAllocator.java
        Show
        Hudson added a comment - Integrated in Hadoop-Hdfs-trunk #1089 (See https://builds.apache.org/job/Hadoop-Hdfs-trunk/1089/ ) MAPREDUCE-4228 . mapreduce.job.reduce.slowstart.completedmaps is not working properly (Jason Lowe via bobby) (Revision 1354181) Result = FAILURE bobby : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1354181 Files : /hadoop/common/trunk/hadoop-mapreduce-project/CHANGES.txt /hadoop/common/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app/src/main/java/org/apache/hadoop/mapreduce/v2/app/rm/RMContainerAllocator.java /hadoop/common/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app/src/test/java/org/apache/hadoop/mapreduce/v2/app/TestRMContainerAllocator.java
        Hide
        Hudson added a comment -

        Integrated in Hadoop-Hdfs-0.23-Build #299 (See https://builds.apache.org/job/Hadoop-Hdfs-0.23-Build/299/)
        svn merge -c 1354181 FIXES: MAPREDUCE-4228. mapreduce.job.reduce.slowstart.completedmaps is not working properly (Jason Lowe via bobby) (Revision 1354185)

        Result = UNSTABLE
        bobby : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1354185
        Files :

        • /hadoop/common/branches/branch-0.23/hadoop-mapreduce-project/CHANGES.txt
        • /hadoop/common/branches/branch-0.23/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app/src/main/java/org/apache/hadoop/mapreduce/v2/app/rm/RMContainerAllocator.java
        • /hadoop/common/branches/branch-0.23/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app/src/test/java/org/apache/hadoop/mapreduce/v2/app/TestRMContainerAllocator.java
        Show
        Hudson added a comment - Integrated in Hadoop-Hdfs-0.23-Build #299 (See https://builds.apache.org/job/Hadoop-Hdfs-0.23-Build/299/ ) svn merge -c 1354181 FIXES: MAPREDUCE-4228 . mapreduce.job.reduce.slowstart.completedmaps is not working properly (Jason Lowe via bobby) (Revision 1354185) Result = UNSTABLE bobby : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1354185 Files : /hadoop/common/branches/branch-0.23/hadoop-mapreduce-project/CHANGES.txt /hadoop/common/branches/branch-0.23/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app/src/main/java/org/apache/hadoop/mapreduce/v2/app/rm/RMContainerAllocator.java /hadoop/common/branches/branch-0.23/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app/src/test/java/org/apache/hadoop/mapreduce/v2/app/TestRMContainerAllocator.java
        Hide
        Hudson added a comment -

        Integrated in Hadoop-Mapreduce-trunk #1122 (See https://builds.apache.org/job/Hadoop-Mapreduce-trunk/1122/)
        MAPREDUCE-4228. mapreduce.job.reduce.slowstart.completedmaps is not working properly (Jason Lowe via bobby) (Revision 1354181)

        Result = FAILURE
        bobby : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1354181
        Files :

        • /hadoop/common/trunk/hadoop-mapreduce-project/CHANGES.txt
        • /hadoop/common/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app/src/main/java/org/apache/hadoop/mapreduce/v2/app/rm/RMContainerAllocator.java
        • /hadoop/common/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app/src/test/java/org/apache/hadoop/mapreduce/v2/app/TestRMContainerAllocator.java
        Show
        Hudson added a comment - Integrated in Hadoop-Mapreduce-trunk #1122 (See https://builds.apache.org/job/Hadoop-Mapreduce-trunk/1122/ ) MAPREDUCE-4228 . mapreduce.job.reduce.slowstart.completedmaps is not working properly (Jason Lowe via bobby) (Revision 1354181) Result = FAILURE bobby : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1354181 Files : /hadoop/common/trunk/hadoop-mapreduce-project/CHANGES.txt /hadoop/common/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app/src/main/java/org/apache/hadoop/mapreduce/v2/app/rm/RMContainerAllocator.java /hadoop/common/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app/src/test/java/org/apache/hadoop/mapreduce/v2/app/TestRMContainerAllocator.java

          People

          • Assignee:
            Jason Lowe
            Reporter:
            Jason Lowe
          • Votes:
            2 Vote for this issue
            Watchers:
            11 Start watching this issue

            Dates

            • Created:
              Updated:
              Resolved:

              Development