Jason Lowe created MAPREDUCE-5513:
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Summary: ConcurrentModificationException in JobControl
Key: MAPREDUCE-5513
URL: https://issues.apache.org/jira/browse/MAPREDUCE-5513
Project: Hadoop Map/Reduce
Issue Type: Bug
Affects Versions: 0.23.9, 2.1.0-beta
Reporter: Jason Lowe
JobControl.toList is locking individual lists to iterate them, but those lists
can be modified elsewhere without holding the list lock. The locking
approaches are mismatched, with toList holding the lock on the actual list
object while other methods hold the JobControl lock when modifying the lists.
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