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https://issues.apache.org/jira/browse/HDFS-9524?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15056693#comment-15056693
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James Clampffer commented on HDFS-9524:
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Thanks for the patch update [~bobthansen]; it works for me now.
As far as I can tell you'd have the same problem if you deleted the FileSystem
in the FileSystem::Connect callback on a failed connect. Maybe it's worth
having a rule/comment about deleting the filesystem from within the context of
a callback?
> libhdfs++ deadlocks in Filesystem::New if NN conneciton fails
> -------------------------------------------------------------
>
> Key: HDFS-9524
> URL: https://issues.apache.org/jira/browse/HDFS-9524
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: hdfs-client
> Reporter: Bob Hansen
> Assignee: Bob Hansen
> Attachments: HDFS-9524.HDFS-8707.000.patch,
> HDFS-9524.HDFS-8707.001.patch
>
>
> FileSystem::New attempts to free the new FileSystem if the connection fails.
> Unfortunately, it's in the middle of a callback from the filesystem's
> threadpool, and attempts to join the worker thread while running the worker
> thread.
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