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https://issues.apache.org/jira/browse/ZOOKEEPER-1702?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Patrick Hunt reassigned ZOOKEEPER-1702:
---------------------------------------
Assignee: Chris Nauroth
> ZooKeeper client may write operation packets before receiving successful
> response to connection request, can cause TCP RST
> --------------------------------------------------------------------------------------------------------------------------
>
> Key: ZOOKEEPER-1702
> URL: https://issues.apache.org/jira/browse/ZOOKEEPER-1702
> Project: ZooKeeper
> Issue Type: Bug
> Components: java client
> Affects Versions: 3.4.2
> Reporter: Chris Nauroth
> Assignee: Chris Nauroth
> Attachments: ZOOKEEPER-1702.1.patch
>
>
> The problem occurs when a connection attempt is pending and there are
> multiple outbound packets in the queue for other operations. In
> {{ClientCnxnSocketNIO#doIO}}, it is possible to receive notification that the
> socket is writable for the next operation packet before receiving
> notification that the socket is readable for the connection response from the
> server. If the server decides that the session is expired, then it responds
> by immediately closing the socket on its side. If the client has written
> packets after the server has closed its end of the socket, then the TCP stack
> may choose to abort the connection with an RST. When this happens, the
> client doesn't receive an orderly shutdown, and ultimately it fails to
> deliver a session expired event to the application.
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