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https://issues.apache.org/jira/browse/HADOOP-10953?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Colin Patrick McCabe updated HADOOP-10953:
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Summary: NetworkTopology#add calls NetworkTopology#toString without holding
the netlock (was: a minor concurrent bug inside NetworkTopology)
> NetworkTopology#add calls NetworkTopology#toString without holding the netlock
> ------------------------------------------------------------------------------
>
> Key: HADOOP-10953
> URL: https://issues.apache.org/jira/browse/HADOOP-10953
> Project: Hadoop Common
> Issue Type: Bug
> Components: net
> Affects Versions: 3.0.0
> Reporter: Liang Xie
> Assignee: Liang Xie
> Priority: Minor
> Attachments: HADOOP-10953.txt
>
>
> Found this issue while reading the related code. In
> NetworkTopology.toString() method, there is no thread safety guarantee
> directly, it's called by add/remove, and inside add/remove, most of
> this.toString() calls are protected by rwlock, except a couple of error
> handling codes, one possible fix is that moving them into lock as well, due
> to not heavy operations, so no obvious downgration should be observed per my
> current knowledge.
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