Eli Collins created MAPREDUCE-4426:
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Summary: Hook daemon process exit for testing
Key: MAPREDUCE-4426
URL: https://issues.apache.org/jira/browse/MAPREDUCE-4426
Project: Hadoop Map/Reduce
Issue Type: Improvement
Components: test
Affects Versions: 2.0.0-alpha
Reporter: Eli Collins
HDFS-3582 introduced a mechanism for testing daemon exit, this allows us to (1)
verify that the daemons don't exit unexpectedly and (2) test the particular
cause of exit when we do expect it. I've never seen the same MR jenkins
failures that prompted HDFS-3582 but it would be worth updating the various raw
calls to System#exit or Runtime#exit in MR to use ExitUtil#terminate for
consistency (and eg aid hooking exit for other reasons like HADOOP-8096).
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