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https://issues.apache.org/jira/browse/TEZ-4305?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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László Bodor resolved TEZ-4305.
-------------------------------
Resolution: Fixed
> Check StreamCapabilities before using HFLUSH from ProtoMessageWriter
> --------------------------------------------------------------------
>
> Key: TEZ-4305
> URL: https://issues.apache.org/jira/browse/TEZ-4305
> Project: Apache Tez
> Issue Type: Bug
> Affects Versions: 0.9.2, 0.10.0
> Reporter: Kishen Das
> Assignee: Kishen Das
> Priority: Major
> Fix For: 0.10.1
>
> Time Spent: 5.5h
> Remaining Estimate: 0h
>
> Following exception is thrown whenever we do ProtoMessageWriter.hflush on S3,
> which internally calls S3ABlockOutputStream.hflush which is not supported and
> it throws java.lang.UnsupportedOperationException.
> bdffe22d96ae [mdc@18060 class="yarn.YarnUncaughtExceptionHandler"
> level="ERROR" thread="HistoryEventHandlingThread"] Thread
> Thread[HistoryEventHandlingThread, 5,main] threw an
> Exception.^Mjava.lang.UnsupportedOperationException: S3A streams are not
> Syncable^M at
> org.apache.hadoop.fs.s3a.S3ABlockOutputStream.hflush(S3ABlockOutputStream.java:657)^M
> at org.apache.hadoop.fs.FS
> DataOutputStream.hflush(FSDataOutputStream.java:136)^M at
> org.apache.hadoop.io.SequenceFile$Writer.hflush(SequenceFile.java:1367)^M at
> org.apache.tez.dag.history.logging.proto.ProtoMessageWriter.hflush(ProtoMessageWr
> iter.java:64)^M at
> org.apache.tez.dag.history.logging.proto.ProtoHistoryLoggingService.finishCurrentDag(ProtoHistoryLoggingService.java:239)^M
> at org.apache.tez.dag.history.logging.proto.ProtoHistoryLoggingService.han
> dleEvent(ProtoHistoryLoggingService.java:198)^M at
> org.apache.tez.dag.history.logging.proto.ProtoHistoryLoggingService.loop(ProtoHistoryLoggingService.java:153)^M
> at java.lang.Thread.run(Thread.java:748)^M
> In order to fix this issue, we should first check if the method is supported
> or not using StreamCapabilities, before invoking it.
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