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From "Flavio Paiva Junqueira (JIRA)" <j...@apache.org>
Subject [jira] Updated: (ZOOKEEPER-58) Race condition on ClientCnxn.java
Date Fri, 27 Jun 2008 15:46:46 GMT

     [ https://issues.apache.org/jira/browse/ZOOKEEPER-58?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Flavio Paiva Junqueira updated ZOOKEEPER-58:
--------------------------------------------

    Component/s: java client

> Race condition on ClientCnxn.java
> ---------------------------------
>
>                 Key: ZOOKEEPER-58
>                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-58
>             Project: Zookeeper
>          Issue Type: Bug
>          Components: java client
>            Reporter: Flavio Paiva Junqueira
>         Attachments: patch-incoming-race.txt
>
>
> There is a race condition involving the ByteByffer incomingBuffer, a field of ClientCnxn.SendThread.
SendThread reads a packet in two steps: first it reads the length of the packet, followed
by a read of the packet itself. Each of these steps corresponds to a call to doIO() from the
main loop of run(). If there is an exception or the session times out, then it may leave incomingBuffer
in an inconsistent state. 
> The attached patch adds code to reset incomingBuffer upon a call to SendThread.cleanup().
This method is called upon an exception on run().

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