[jira] [Resolved] (HADOOP-17657) SequeneFile.Writer should implement StreamCapabilities

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[jira] [Resolved] (HADOOP-17657) SequeneFile.Writer should implement StreamCapabilities

ASF GitHub Bot (Jira)

     [ https://issues.apache.org/jira/browse/HADOOP-17657?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Wei-Chiu Chuang resolved HADOOP-17657.
--------------------------------------
    Resolution: Fixed

> SequeneFile.Writer should implement StreamCapabilities
> ------------------------------------------------------
>
>                 Key: HADOOP-17657
>                 URL: https://issues.apache.org/jira/browse/HADOOP-17657
>             Project: Hadoop Common
>          Issue Type: Bug
>            Reporter: Kishen Das
>            Assignee: Kishen Das
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 3.3.1, 3.4.0
>
>          Time Spent: 3h 50m
>  Remaining Estimate: 0h
>
> Following exception is thrown whenever we invoke ProtoMessageWriter.hflush on S3 from Tez, which internally calls org.apache.hadoop.io.SequenceFile$Writer.hflush ->  org.apache.hadoop.fs.FS DataOutputStream.hflush -> S3ABlockOutputStream.hflush which is not implemented and throws java.lang.UnsupportedOperationException. 
> bdffe22d96ae [mdc@18060 class="yarn.YarnUncaughtExceptionHandler" level="ERROR" thread="HistoryEventHandlingThread"] Thread Thread[HistoryEventHandlingThread, 5,main] threw an Exception.^Mjava.lang.UnsupportedOperationException: S3A streams are not Syncable^M at org.apache.hadoop.fs.s3a.S3ABlockOutputStream.hflush(S3ABlockOutputStream.java:657)^M at org.apache.hadoop.fs.FS DataOutputStream.hflush(FSDataOutputStream.java:136)^M at org.apache.hadoop.io.SequenceFile$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 implement StreamCapabilities in SequenceFile.Writer. Also, we should fall back to flush(), if hflush() is not supported. 



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