DFSOutputStream.close doesn't properly handle interruption
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Key: HDFS-3041
URL: https://issues.apache.org/jira/browse/HDFS-3041
Project: Hadoop HDFS
Issue Type: Bug
Components: hdfs client
Affects Versions: 0.23.0, 0.24.0
Reporter: Todd Lipcon
Assignee: Todd Lipcon
TestHFlush.testHFlushInterrupted can fail occasionally due to a race: if a
thread is interrupted while calling close(), then the {{finally}} clause of the
{{close}} function sets {{closed = true}}. At this point it has enqueued the
"end of block" packet to the DNs, but hasn't called {{completeFile}}. Then, if
{{close}} is called again (as in the test case), it will be short-circuited
since {{closed}} is already true. Thus {{completeFile}} never ends up getting
called. This also means that the test can fail if the pipeline is running
slowly, since the assertion that the file is the correct length won't see the
last packet or two.
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