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https://issues.apache.org/jira/browse/QPID-6974?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Keith Wall resolved QPID-6974.
------------------------------
    Resolution: Cannot Reproduce

On closer inspection, it appears that locking in the code does not allow this 
to happen.  The root cause of this AMQFDE remains unexplained.

> Timeouts occurring within IoSender may result in an illegal AMQP stream being 
> sent to the peer
> ----------------------------------------------------------------------------------------------
>
>                 Key: QPID-6974
>                 URL: https://issues.apache.org/jira/browse/QPID-6974
>             Project: Qpid
>          Issue Type: Bug
>          Components: Java Broker, Java Client
>    Affects Versions: 0.32, qpid-java-6.0
>            Reporter: Keith Wall
>
> This defect applies to the legacy Java Client only for 6.0.0, and to both the 
> Java Broker and Java Client for <= 0.32.
> If the IoSender is in use by multiple threads, as might be the case if a 
> client application were using multiple JMS Sessions on a single Conection, 
> there is the possibility that if a #send() call times out, another thread 
> might succeed in it #send call, if there is space becomes available in the 
> buffer.  This could result in in a corrupt AMQP stream being received by the 
> peer.  The first caller's buffer will be partially sent and then followed by 
> second callers.
> This would lead to same symptom as report in QPID-6206.  The following stack 
> trace was generated by a 0.32 derivative.
> {code}
> 2016-01-05 18:22:09,190 ERROR [IoReceiver - /xxx.xx.xx.xx:60578] 
> (AMQProtocolEngine.java:364) - Frame decoding
> org.apache.qpid.framing.AMQFrameDecodingException: Incoming frame size of 
> 570425344 is larger than negotiated maximum of  104857600 [error code 501: 
> frame error]
>         at org.apache.qpid.codec.AMQDecoder.decodable(AMQDecoder.java:342)
>         at org.apache.qpid.codec.AMQDecoder.decodeBuffer(AMQDecoder.java:256)
>         at 
> org.apache.qpid.server.protocol.v0_8.AMQProtocolEngine$2.run(AMQProtocolEngine.java:334)
>         at 
> org.apache.qpid.server.protocol.v0_8.AMQProtocolEngine$2.run(AMQProtocolEngine.java:311)
>         at java.security.AccessController.doPrivileged(Native Method)
>         at javax.security.auth.Subject.doAs(Subject.java:356)
>         at 
> org.apache.qpid.server.protocol.v0_8.AMQProtocolEngine.received(AMQProtocolEngine.java:310)
>         at 
> org.apache.qpid.server.protocol.v0_8.AMQProtocolEngine.received(AMQProtocolEngine.java:95)
>         at 
> org.apache.qpid.server.protocol.MultiVersionProtocolEngine.received(MultiVersionProtocolEngine.java:153)
>         at 
> org.apache.qpid.server.protocol.MultiVersionProtocolEngine.received(MultiVersionProtocolEngine.java:51)
>         at 
> org.apache.qpid.transport.network.io.IoReceiver.run(IoReceiver.java:161)
> {code}



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