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Posted to mapreduce-issues@hadoop.apache.org by "Jason Lowe (JIRA)" <ji...@apache.org> on 2012/07/13 16:13:34 UTC
[jira] [Commented] (MAPREDUCE-3410) Capacity scheduler
reconfiguration of queues does not work for add sub-queues to an existing
queue
[ https://issues.apache.org/jira/browse/MAPREDUCE-3410?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13413768#comment-13413768 ]
Jason Lowe commented on MAPREDUCE-3410:
---------------------------------------
Part of the issue here is that adding child queues to what was a leaf queue has some similarities with the delete queue case, and the delete queue case currently is not supported. Applications only run in leaf queues, so changing a leaf queue into a parent queue is sort of like deleting the leaf queue and adding a parent queuethat happens to have the same name. Like the delete scenario, we have to determine what to do with the applications currently running on the leaf queue when the reconfig occurs. Do we terminate the active applications? Stop accepting new applications but let the current ones drain before reconfiguring? In the short term, I think it's a documentation issue to state it's not a supported operation. Once support for queue delete is added, I think support for this would be straightforward (or vice-versa).
> Capacity scheduler reconfiguration of queues does not work for add sub-queues to an existing queue
> --------------------------------------------------------------------------------------------------
>
> Key: MAPREDUCE-3410
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-3410
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: mrv2
> Affects Versions: 0.23.0
> Reporter: Anupam Seth
>
> If we have an existing queue configuration such as
> root
> |---> A
> |---> B
> and we attempt to reconfigure it so that we now have
> root
> |---> A
> |---> A1
> |---> A2
> |---> B
> we get an IOException as follows:
> java.io.IOException: Failed to re-init queues
> at org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.CapacityScheduler.reinitialize(CapacityScheduler.java:197)
> at org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.TestLeafQueue.testInitializeQueue(TestLeafQueue.java:206)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:597)
> at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)
> at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
> at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)
> at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
> at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:28)
> at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:31)
> at org.junit.runners.BlockJUnit4ClassRunner.runNotIgnored(BlockJUnit4ClassRunner.java:79)
> at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:71)
> at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:49)
> at org.junit.runners.ParentRunner$3.run(ParentRunner.java:193)
> at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:52)
> at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:191)
> at org.junit.runners.ParentRunner.access$000(ParentRunner.java:42)
> at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:184)
> at org.junit.runners.ParentRunner.run(ParentRunner.java:236)
> at org.apache.maven.surefire.junit4.JUnit4TestSet.execute(JUnit4TestSet.java:45)
> at org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:123)
> at org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:104)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:597)
> at org.apache.maven.surefire.util.ReflectionUtils.invokeMethodWithArray(ReflectionUtils.java:164)
> at org.apache.maven.surefire.booter.ProviderFactory$ProviderProxy.invoke(ProviderFactory.java:110)
> at org.apache.maven.surefire.booter.SurefireStarter.invokeProvider(SurefireStarter.java:172)
> at org.apache.maven.surefire.booter.SurefireStarter.runSuitesInProcessWhenForked(SurefireStarter.java:78)
> at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:70)
> Caused by: java.io.IOException: Trying to reinitialize root.a from root.a
> at org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.LeafQueue.reinitialize(LeafQueue.java:524)
> at org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.ParentQueue.reinitialize(ParentQueue.java:360)
> at org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.CapacityScheduler.reinitializeQueues(CapacityScheduler.java:240)
> at org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.CapacityScheduler.reinitialize(CapacityScheduler.java:194)
> ... 32 more
> This is apparently because the CapacityScheduler still wants to think of A as a LeafQueue instead of realizing it to be updated as a ParentQueue.
> Maybe, this use case is not supposed to be supported, in which case, probably the documentation should be updated to state this scenario as such more clearly (currently, it atleast implies that only deletion is not supported).
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