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https://issues.apache.org/jira/browse/PIG-4012?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14533237#comment-14533237
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Rohini Palaniswamy commented on PIG-4012:
-----------------------------------------
bq. I somehow can't find a way to Re-open this one
This is because
https://issues.apache.org/jira/plugins/servlet/project-config/PIG/workflows has
no-reopen-closed and that seems to be the default configuration for other
projects as well and something that cannot be modified by Project
Administrators. Since there is lot of history here not creating a duplicate
one. Will leave it with the version change and ensure it actually gets fixed
soon in trunk.
> java.lang.IllegalArgumentException: Comparison method violates its general
> contract! SpillableMemoryManager
> -----------------------------------------------------------------------------------------------------------
>
> Key: PIG-4012
> URL: https://issues.apache.org/jira/browse/PIG-4012
> Project: Pig
> Issue Type: Bug
> Components: impl
> Affects Versions: 0.12.0
> Environment: java version "1.7.0_60-ea"
> Java(TM) SE Runtime Environment (build 1.7.0_60-ea-b02)
> Java HotSpot(TM) 64-Bit Server VM (build 24.60-b04, mixed mode)
> Reporter: David Dreyfus
> Assignee: David Dreyfus
> Fix For: 0.16.0
>
>
> java.lang.IllegalArgumentException: Comparison method violates its general
> contract!
> at java.util.TimSort.mergeHi(TimSort.java:868)
> at java.util.TimSort.mergeAt(TimSort.java:485)
> at java.util.TimSort.mergeForceCollapse(TimSort.java:426)
> at java.util.TimSort.sort(TimSort.java:223)
> at java.util.TimSort.sort(TimSort.java:173)
> at java.util.Arrays.sort(Arrays.java:659)
> at java.util.Collections.sort(Collections.java:217)
> at
> org.apache.pig.impl.util.SpillableMemoryManager.handleNotification(SpillableMemoryManager.java:199)
> at
> sun.management.NotificationEmitterSupport.sendNotification(NotificationEmitterSupport.java:156)
> at sun.management.MemoryImpl.createNotification(MemoryImpl.java:168)
> at
> sun.management.MemoryPoolImpl$PoolSensor.triggerAction(MemoryPoolImpl.java:301)
> at sun.management.Sensor.trigger(Sensor.java:137)
> From SpillableMemoryManager.java:
> /**
> * We don't lock anything, so this sort may not be stable if
> a WeakReference suddenly
> * becomes null, but it will be close enough.
> * Also between the time we sort and we use these spillables,
> they
> * may actually change in size - so this is just best effort
> */
> Issue may be due to Java 7 and reporting vs ignoring the exception.
> Trying
> -Djava.util.Arrays.useLegacyMergeSort=true
> http://bugs.java.com/bugdatabase/view_bug.do?bug_id=6804124
> suggests the newer MergeSort is much faster.
> Someone may want to make the sorting stable in SpillableMemoryManager so that
> the new merge sort can be used without failure.
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