[ 
https://issues.apache.org/jira/browse/QPID-6119?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14190405#comment-14190405
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Rob Godfrey commented on QPID-6119:
-----------------------------------

Gald to hear that fixes it - sorry I didn't spot the underlying problem first 
time around (though a fix still wouldn't have made it in time for the 0.30 
release unfortunately), and apologies for the bug existing in the first place.

> [AMQP 1.0] - java.lang.NullPointerException on reconnect when link has been 
> down between client and broker
> ----------------------------------------------------------------------------------------------------------
>
>                 Key: QPID-6119
>                 URL: https://issues.apache.org/jira/browse/QPID-6119
>             Project: Qpid
>          Issue Type: Bug
>          Components: Java Client
>    Affects Versions: 0.28
>            Reporter: Mathias Wiberg
>             Fix For: 0.31
>
>
> Getting a NullPointerException upon reconnect when the link between the 
> client and the broker has been down (for example, due to network issues).
> Caused by: java.lang.NullPointerException: null
>         at 
> org.apache.qpid.amqp_1_0.client.Connection.checkNotClosed(Connection.java:298)
>  ~[qpid-amqp-1-0-client-0.28.jar:na]
>         at 
> org.apache.qpid.amqp_1_0.client.Connection.createSession(Connection.java:289) 
> ~[qpid-amqp-1-0-client-0.28.jar:na]
>         at 
> org.apache.qpid.amqp_1_0.jms.impl.SessionImpl.<init>(SessionImpl.java:86) 
> ~[qpid-amqp-1-0-client-jms-0.28.jar:na]
>         at 
> org.apache.qpid.amqp_1_0.jms.impl.ConnectionImpl.createSession(ConnectionImpl.java:231)
>  ~[qpid-amqp-1-0-client-jms-0.28.jar:na]
>         at 
> org.apache.qpid.amqp_1_0.jms.impl.ConnectionImpl.createSession(ConnectionImpl.java:210)
>  ~[qpid-amqp-1-0-client-jms-0.28.jar:na]
>         at 
> org.apache.qpid.amqp_1_0.jms.impl.ConnectionImpl.createSession(ConnectionImpl.java:40)
>  ~[qpid-amqp-1-0-client-jms-0.28.jar:na]
>         at sun.reflect.GeneratedMethodAccessor234.invoke(Unknown Source) 
> ~[na:na]
>         at 
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>  ~[na:1.6.0_33]
>         at java.lang.reflect.Method.invoke(Method.java:597) ~[na:1.6.0_33]
>         at 
> org.springframework.jms.connection.SingleConnectionFactory$SharedConnectionInvocationHandler.invoke(SingleConnectionFactory.java:571)
>  ~[spring-jms-4.0.1.RELEASE.jar:4.0.1.RELEASE]
>         at $Proxy75.createSession(Unknown Source) ~[na:na]
>         at 
> org.springframework.jms.support.JmsAccessor.createSession(JmsAccessor.java:197)
>  ~[spring-jms-4.0.1.RELEASE.jar:4.0.1.RELEASE]
>         at 
> org.springframework.jms.core.JmsTemplate.execute(JmsTemplate.java:482) 
> ~[spring-jms-4.0.1.RELEASE.jar:4.0.1.RELEASE]
>         at 
> org.springframework.jms.core.JmsTemplate.send(JmsTemplate.java:577) 
> ~[spring-jms-4.0.1.RELEASE.jar:4.0.1.RELEASE]
>         at 
> org.springframework.jms.core.JmsTemplate.convertAndSend(JmsTemplate.java:703) 
> ~[spring-jms-4.0.1.RELEASE.jar:4.0.1.RELEASE]
>         at 
> org.springframework.integration.jms.JmsSendingMessageHandler.send(JmsSendingMessageHandler.java:145)
>  ~[spring-integration-jms-4.0.0.M3.jar:na]
>         at 
> org.springframework.integration.jms.JmsSendingMessageHandler.handleMessageInternal(JmsSendingMessageHandler.java:115)
>  ~[spring-integration-jms-4.0.0.M3.jar:na]



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