Matthias Vetter created AMQ-4035:
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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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