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https://issues.apache.org/jira/browse/HDFS-13731?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16590928#comment-16590928
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Xiao Chen commented on HDFS-13731:
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Thanks a lot [~zvenczel] for the work here. Good find!
For the {{ConcurrentModificationException}}, I agree it should be better
protected. I think we should protect this in
{{ReencryptionUpdater#processCheckpoints}} with a {{synchronized(handler)}}
too. Currently handler has FSDirectory readlock, and updater has FSDirectory
writelock, which doesn't protect the removal of the list.
Could you share a little more about what happened in the 2 other failures?
Great if we can have a failure log. {{saveNamespace}} is synchronized call, why
would {{waitFor}} help us?
> ReencryptionUpdater fails with ConcurrentModificationException during
> processCheckpoints
> ----------------------------------------------------------------------------------------
>
> Key: HDFS-13731
> URL: https://issues.apache.org/jira/browse/HDFS-13731
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: encryption, test
> Affects Versions: 3.0.0
> Reporter: Xiao Chen
> Assignee: Zsolt Venczel
> Priority: Major
> Attachments: HDFS-13731-failure.log, HDFS-13731.01.patch
>
>
> HDFS-12837 fixed some flakiness of Reencryption related tests. But as
> [~zvenczel]'s comment, there are a few timeouts still. We should investigate
> that.
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