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https://issues.apache.org/jira/browse/HADOOP-3436?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Harsh J resolved HADOOP-3436.
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Resolution: Not A Problem
Does not appear to be a problem w.r.t. trunk. There is no such variable held (a
collection is used instead, and that requires to hold JT lock and is
synchronized (per comments)).
Resolving as "Not a problem" (anymore). Stale issue.
> Useless synchronized in JobTracker
> ----------------------------------
>
> Key: HADOOP-3436
> URL: https://issues.apache.org/jira/browse/HADOOP-3436
> Project: Hadoop Common
> Issue Type: Improvement
> Reporter: Brice Arnould
> Assignee: Brice Arnould
> Priority: Trivial
>
> In the original code, numTaskTrackers is fetch in a synchronized way, which
> is useless because anyway it might be change during the running of the
> algorithm.
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