HA: TestFailureOfSharedDir.testFailureOfSharedDir() has race condition
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Key: HDFS-2915
URL: https://issues.apache.org/jira/browse/HDFS-2915
Project: Hadoop HDFS
Issue Type: Sub-task
Components: name-node
Affects Versions: HA branch (HDFS-1623)
Reporter: Bikas Saha
Assignee: Bikas Saha
Priority: Minor
The test deletes the shared edits dir to simulate a failure. Then it calls
rollEditLogs() to trigger the deleted dir to be used and fail with an
IOException. Unfortunately, deleting the shared dir can put the NN in safe mode
due to lack of space. This causes a SafeModeException to be thrown when
rollEditDirs() is called. This exception is caught as an IOException in the
test but the associated assert in the catch block fails.
This always happens in the debugger because the delay in stepping through
causes the safe mode change to happen before rollEditLogs() gets called.
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