[jira] [Created] (QPIDJMS-474) Race condition in JmsLocalTransactionContext.onConnectionInterrupted leading to NPE

["Mario Schlipf (Jira)" <ji...@apache.org>]

Mario Schlipf created QPIDJMS-474:
-------------------------------------

             Summary: Race condition in JmsLocalTransactionContext.onConnectionInterrupted leading to NPE
                 Key: QPIDJMS-474
                 URL: https://issues.apache.org/jira/browse/QPIDJMS-474
             Project: Qpid JMS
          Issue Type: Bug
          Components: qpid-jms-client
    Affects Versions: 0.45.0
            Reporter: Mario Schlipf


Hi,

I am using qpid-cms-client version 0.39.0, but I can see that the same problem exists in the current version.

The function `JmsLocalTransactionContext.onConnectionInterrupted` is missing a null-check for the `transactionInfo` field.

This function is called from `JmsSession.onConnectionInterrupted`. If `transactionInfo` is null, this leads to the fact that consumers and producers are not properly notified of the interrupted connection.

I am using qpid-jms-client in conjunction with Spring's `SingleConnectionFactory`. I can see rare cases where `transactionInfo` is null and in which the SpringConnectionFactory will not be informed about the transaction loss. In these cases, there is no automatic reconnect from Spring.

 

Below some logging when the NPE occurs:

```

2019-09-19T08:39:17,141 [WARN ] [AmqpProvider :(2):[amqps://10.0.0.12:5672]] AbstractEventExecutor - A task raised an exception. Task: org.apache.qpid.jms.provider.amqp.AmqpProvider$$Lambda$327/2054861790@467bfdd

java.lang.NullPointerException: null

        at org.apache.qpid.jms.JmsLocalTransactionContext.onConnectionInterrupted(JmsLocalTransactionContext.java:333) ~[qpid-jms-client-0.39.0.jar!/:?]

        at org.apache.qpid.jms.JmsSession.onConnectionInterrupted(JmsSession.java:1340) ~[qpid-jms-client-0.39.0.jar!/:?]

        at org.apache.qpid.jms.JmsConnection.onConnectionFailure(JmsConnection.java:1356) ~[qpid-jms-client-0.39.0.jar!/:?]

        at org.apache.qpid.jms.provider.amqp.AmqpProvider.fireProviderException(AmqpProvider.java:1069) ~[qpid-jms-client-0.39.0.jar!/:?]

        at org.apache.qpid.jms.provider.amqp.AmqpProvider.lambda$onTransportClosed$18(AmqpProvider.java:867) ~[qpid-jms-client-0.39.0.jar!/:?]

        at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:163) ~[netty-common-4.1.29.Final.jar!/:4.1.29.Final]

        at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:404) ~[netty-common-4.1.29.Final.jar!/:4.1.29.Final]

        at io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:315) ~[netty-transport-native-epoll-4.1.29.Final-linux-x86_64.jar!/:4.1.29.Final]

        at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:884) ~[netty-common-4.1.29.Final.jar!/:4.1.29.Final]

        at java.lang.Thread.run(Thread.java:748) [?:1.8.0_201]

```

 

My suspicion is that this NPE is responsible for the exception not properly proparagated, but I am still investigating.

It would help very much if anyone from the Qpid team could validate this as well.

 

Thanks



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