John Doe created MAPREDUCE-7512:
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Summary: Thread-unsafe collection can cause lost operation
Key: MAPREDUCE-7512
URL: https://issues.apache.org/jira/browse/MAPREDUCE-7512
Project: Hadoop Map/Reduce
Issue Type: Bug
Affects Versions: 3.4.1
Reporter: John Doe
registeredCounters can be accessed concurrently by registerCounter and
incrementCounter, which causes registeredCounters.get(id) in incrementCounter
to return the wrong value.
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