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From "Flavio Paiva Junqueira (JIRA)" <j...@apache.org>
Subject [jira] Created: (ZOOKEEPER-58) Race condition on ClientCnxn.java
Date Fri, 27 Jun 2008 15:38:45 GMT
Race condition on ClientCnxn.java
---------------------------------

                 Key: ZOOKEEPER-58
                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-58
             Project: Zookeeper
          Issue Type: Bug
            Reporter: Flavio Paiva Junqueira


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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