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From "Matthias Vetter (JIRA)" <j...@apache.org>
Subject [jira] [Created] (AMQ-4035) Null pointer in class KahaDBStore programmed
Date Mon, 10 Sep 2012 13:30:07 GMT
Matthias Vetter created AMQ-4035:
------------------------------------

             Summary: Null pointer in class KahaDBStore programmed
                 Key: AMQ-4035
                 URL: https://issues.apache.org/jira/browse/AMQ-4035
             Project: ActiveMQ
          Issue Type: Bug
          Components: Message Store
         Environment: Windows 7, Active MQ 5.6.0
            Reporter: Matthias Vetter


The method "protected void doAcknowledge(ConnectionContext context, String subscriptionKey,
MessageId messageId, MessageAck ack)" in KahaDBStore, line 705, contains a get-operation on
parameter "ack" in line 711:
command.setTransactionInfo(transactionIdTransformer.transform(ack.getTransactionId()));
Unfortunately, the method is called from inside with setting ack=null!
(same class, method "run" of internal class StoreTopicTask, line 1268):
this.topicStore.doAcknowledge(context, key, this.message.getMessageId(), null);
Thus, a null pointer exception is guaranteed, whenever the run-method is called (which is
the case, for instance, when topic messages are synchronized in a network cluster).

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