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https://issues.apache.org/jira/browse/HDFS-10181?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Lin Yiqun updated HDFS-10181:
-----------------------------
Resolution: Duplicate
Status: Resolved (was: Patch Available)
> TestHFlush frequently fails due to theadInterrupt
> -------------------------------------------------
>
> Key: HDFS-10181
> URL: https://issues.apache.org/jira/browse/HDFS-10181
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: test
> Reporter: Lin Yiqun
> Assignee: Lin Yiqun
> Attachments: HDFS-10181.001.patch
>
>
> The test {{TestFLush}} frequently fails in recent patchs. I looked for the
> failed log records. I found there were two reason lead this test
> {{TestFLush#testHFlushInterrupted}} to be failed. And this method failure is
> the main reason that {{TestFLush}} not pass test. The two failed reasons is
> below:
> {code}
> Tests run: 14, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 30.325 sec
> <<< FAILURE! - in org.apache.hadoop.hdfs.TestHFlush
> testHFlushInterrupted(org.apache.hadoop.hdfs.TestHFlush) Time elapsed: 0.864
> sec <<< ERROR!
> java.io.IOException: The stream is closed
> at
> org.apache.hadoop.net.SocketOutputStream.write(SocketOutputStream.java:118)
> at
> java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:82)
> at java.io.BufferedOutputStream.flush(BufferedOutputStream.java:140)
> at java.io.DataOutputStream.flush(DataOutputStream.java:123)
> at java.io.FilterOutputStream.close(FilterOutputStream.java:158)
> at
> org.apache.hadoop.hdfs.DataStreamer.closeStream(DataStreamer.java:877)
> at
> org.apache.hadoop.hdfs.DataStreamer.closeInternal(DataStreamer.java:726)
> at org.apache.hadoop.hdfs.DataStreamer.run(DataStreamer.java:721)
> {code}
> {code}
> testHFlushInterrupted(org.apache.hadoop.hdfs.TestHFlush) Time elapsed: 0.862
> sec <<< ERROR!
> java.nio.channels.ClosedByInterruptException: null
> at
> java.nio.channels.spi.AbstractInterruptibleChannel.end(AbstractInterruptibleChannel.java:202)
> at sun.nio.ch.SocketChannelImpl.write(SocketChannelImpl.java:501)
> at
> org.apache.hadoop.net.SocketOutputStream$Writer.performIO(SocketOutputStream.java:63)
> at
> org.apache.hadoop.net.SocketIOWithTimeout.doIO(SocketIOWithTimeout.java:142)
> at
> org.apache.hadoop.net.SocketOutputStream.write(SocketOutputStream.java:159)
> at
> org.apache.hadoop.net.SocketOutputStream.write(SocketOutputStream.java:117)
> at
> java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:82)
> at java.io.BufferedOutputStream.flush(BufferedOutputStream.java:140)
> at java.io.DataOutputStream.flush(DataOutputStream.java:123)
> at org.apache.hadoop.hdfs.DataStreamer.run(DataStreamer.java:653)
> {code}
> I analysed them, can be simplify described as below:
> * The IOException happens when the stream is closed but the stream write
> operation continues.
> * The ClosedByInterruptException happens when stream do hfulsh operations and
> thread interrupt happens.
> So we should catch these exceptions in stream {{hflush}} and {{write}}
> operations.
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