Todd Lipcon created MAPREDUCE-4359:
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Summary: Potential deadlock in Counters
Key: MAPREDUCE-4359
URL: https://issues.apache.org/jira/browse/MAPREDUCE-4359
Project: Hadoop Map/Reduce
Issue Type: Bug
Affects Versions: 1.0.3
Reporter: Todd Lipcon
jcarder identified this deadlock in branch-1 (though it may also be present in
trunk):
- Counters.size() is synchronized and locks Counters before Group
- Counters.Group.getCounterForName() is synchronized and calls through to
Counters.size()
This creates a potential cycle which could cause a deadlock (though probably
quite rare in practice)
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