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Posted to issues@tez.apache.org by "Tsuyoshi Ozawa (JIRA)" <ji...@apache.org> on 2015/10/07 01:58:26 UTC
[jira] [Updated] (TEZ-2849) Implement Specific Workaround for
JDK-8026049 & JDK-8073093
[ https://issues.apache.org/jira/browse/TEZ-2849?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Tsuyoshi Ozawa updated TEZ-2849:
--------------------------------
Attachment: TEZ-2849.2.patch
[~gopalv] Attaching a patch rebased on trunk. Unfortunately, it fails with UnsupportedOperationException.
{quote}
15/10/06 23:54:42 INFO examples.TeraSortWithSession: DAG diagnostics: [Vertex failed, vertexName=TeraSortMapper, vertexId=vertex_1444175589504_0001_2_00, diagnostics=[Task failed, taskId=task_1444175589504_0001_2_00_000016, diagnostics=[TaskAttempt 0 failed, info=[Error: Failure while running task: attempt_1444175589504_0001_2_00_000016_0:java.lang.UnsupportedOperationException
at java.nio.ByteBuffer.array(ByteBuffer.java:959)
at org.apache.tez.runtime.library.common.sort.impl.PipelinedSorter$SortSpan.compareKeys(PipelinedSorter.java:828)
at org.apache.tez.runtime.library.common.sort.impl.PipelinedSorter$SortSpan.compare(PipelinedSorter.java:847)
at org.apache.hadoop.util.QuickSort.sortInternal(QuickSort.java:99)
at org.apache.hadoop.util.QuickSort.sort(QuickSort.java:63)
at org.apache.tez.runtime.library.common.sort.impl.PipelinedSorter$SortSpan.sort(PipelinedSorter.java:794)
at org.apache.tez.runtime.library.common.sort.impl.PipelinedSorter.flush(PipelinedSorter.java:535)
at org.apache.tez.runtime.library.output.OrderedPartitionedKVOutput.close(OrderedPartitionedKVOutput.java:182)
at org.apache.tez.runtime.LogicalIOProcessorRuntimeTask.close(LogicalIOProcessorRuntimeTask.java:375)
at org.apache.tez.runtime.task.TaskRunner2Callable$1.run(TaskRunner2Callable.java:79)
at org.apache.tez.runtime.task.TaskRunner2Callable$1.run(TaskRunner2Callable.java:60)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:415)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1657)
at org.apache.tez.runtime.task.TaskRunner2Callable.callInternal(TaskRunner2Callable.java:60)
at org.apache.tez.runtime.task.TaskRunner2Callable.callInternal(TaskRunner2Callable.java:35)
at org.apache.tez.common.CallableWithNdc.call(CallableWithNdc.java:36)
at java.util.concurrent.FutureTask.run(FutureTask.java:262)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745)
{quote}
> Implement Specific Workaround for JDK-8026049 & JDK-8073093
> ------------------------------------------------------------
>
> Key: TEZ-2849
> URL: https://issues.apache.org/jira/browse/TEZ-2849
> Project: Apache Tez
> Issue Type: Sub-task
> Affects Versions: 0.8.1
> Reporter: Gopal V
> Assignee: Gopal V
> Attachments: TEZ-2849.1.patch, TEZ-2849.2.patch
>
>
> The CPU performance overhead of the sort operation is tied to the JIT handling of the aliased byte buffers without an explicit alignment (i.e a byte[] buffer referenced as an IntBuffer).
> https://bugs.openjdk.java.net/browse/JDK-8026049
> +
> https://bugs.openjdk.java.net/browse/JDK-8073093
> Workaround that JIT limitation while keeping in mind the modern CPU micro-code optimizations around alignment.
> http://lemire.me/blog/archives/2012/05/31/data-alignment-for-speed-myth-or-reality/
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