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https://issues.apache.org/jira/browse/HADOOP-3353?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Andras Bokor resolved HADOOP-3353.
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Resolution: Invalid
This code has totally changed in the past 11 years.
> DataNode.run() join() and shutdown() ought to have synchronized access to
> dataNodeThread
> ------------------------------------------------------------------------------------------
>
> Key: HADOOP-3353
> URL: https://issues.apache.org/jira/browse/HADOOP-3353
> Project: Hadoop Common
> Issue Type: Bug
> Reporter: Steve Loughran
> Priority: Major
>
> Looking at the DataNode.run() and join() methods, they are manipulating the
> state of the dataNodeThread:
> void join() {
> if (dataNodeThread != null) {
> try {
> dataNodeThread.join();
> } catch (InterruptedException e) {}
> }
> }
> There's something similar in shutdown()
> This could lead to race conditions on shutdown, where the check passes and
> then the reference is null when the next method is invoked.
> Marking major as race conditions are always trouble, and hard to test.
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