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https://issues.apache.org/jira/browse/HDFS-10409?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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James Clampffer updated HDFS-10409:
-----------------------------------
Attachment: locked_dtor.patch
Simple reproducer. Seems to reproduce consistently; originally found when
pointing the client at a standby NN and doing various RPC calls.
> libhdfs++: Something is holding connection_state_lock in RpcConnectionImpl
> destructor
> -------------------------------------------------------------------------------------
>
> Key: HDFS-10409
> URL: https://issues.apache.org/jira/browse/HDFS-10409
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Reporter: James Clampffer
> Attachments: locked_dtor.patch
>
>
> The destructor to RpcConnectionImpl grabs a lock using a std::lock_guard<>.
> It turns out something is already holding the lock when this happens. Best
> bet is something that looks like:
> {code}
> void SomeFunctionThatShouldntTakeLock(){
> std::lock_guard<std::mutex> bad(connection_state_lock_)
> conn_.reset(); //conn is a shared_ptr to RpcConnectionImpl
> }
> {code}
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