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https://issues.apache.org/jira/browse/HDFS-10231?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15222340#comment-15222340
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James Clampffer commented on HDFS-10231:
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New patch looks good to me, +1
> libhdfs++: Fix race conditions in RPC layer
> -------------------------------------------
>
> Key: HDFS-10231
> URL: https://issues.apache.org/jira/browse/HDFS-10231
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: hdfs-client
> Reporter: James Clampffer
> Assignee: Bob Hansen
> Attachments: HDFS-10231.HDFS-8707.000.patch,
> HDFS-10231.HDFS-8707.001.patch, HDFS-10231.HDFS-8707.002.patch,
> HDFS-10231.HDFS-8707.003.patch
>
>
> Namenode calls seem to hang and the retry logic never properly kicks in. It
> looks like there's a race condition that leads to a failed rpc call never
> properly passing the request object to the new RpcConnectionImpl so things
> hang forever. RpcConnectionImpl objects are also kept alive longer than they
> should because of a shared_ptr cycle between them and the timeout tracking
> objects.
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