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https://issues.apache.org/jira/browse/MAPREDUCE-7512?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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John Doe updated MAPREDUCE-7512:
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Attachment: TestViolation.java
> 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
> Priority: Major
> Attachments: TestViolation.java
>
>
> 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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