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https://issues.apache.org/jira/browse/QPID-6482?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15273130#comment-15273130
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Keith Wall commented on QPID-6482:
----------------------------------

Praveen, I would suggest turning on debug on the client (see the link Rob gave 
above) and see if you have the same underlying symptoms.  The conclusion 
reached above suggests that Service Bus was believed to be at fault when 
messages were large.

> NPE in SessionEndpoint.receiveTransfer when receiving large message
> -------------------------------------------------------------------
>
>                 Key: QPID-6482
>                 URL: https://issues.apache.org/jira/browse/QPID-6482
>             Project: Qpid
>          Issue Type: Bug
>          Components: JMS AMQP 1.0 Client
>    Affects Versions: 0.32
>            Reporter: Mark Soderquist
>         Attachments: qpid-jms-0.log
>
>
> We are occasionally seeing the following exception when receiving a message 
> of 500000 bytes. Sometimes it helps to increase the receive timeout but not 
> always:
> java.lang.NullPointerException
>       at 
> org.apache.qpid.amqp_1_0.transport.SessionEndpoint.receiveTransfer(SessionEndpoint.java:435)
>       at 
> org.apache.qpid.amqp_1_0.transport.ConnectionEndpoint.receiveTransfer(ConnectionEndpoint.java:655)
>       at 
> org.apache.qpid.amqp_1_0.type.transport.Transfer.invoke(Transfer.java:285)
>       at 
> org.apache.qpid.amqp_1_0.transport.ConnectionEndpoint.receive(ConnectionEndpoint.java:808)
>       at 
> org.apache.qpid.amqp_1_0.framing.FrameHandler.parse(FrameHandler.java:241)
>       at 
> org.apache.qpid.amqp_1_0.framing.ConnectionHandler.parse(ConnectionHandler.java:75)
>       at 
> org.apache.qpid.amqp_1_0.client.TCPTransportProvider.doRead(TCPTransportProvider.java:244)
>       at 
> org.apache.qpid.amqp_1_0.client.TCPTransportProvider.access$000(TCPTransportProvider.java:47)
>       at 
> org.apache.qpid.amqp_1_0.client.TCPTransportProvider$1.run(TCPTransportProvider.java:185)
>       at java.lang.Thread.run(Thread.java:745)
> Unknown endpoint 
> Transfer{handle=0,deliveryId=0,deliveryTag=\x00\x00\x00\x00\x00\x00\x00\x00,messageFormat=0}



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