[AMQ-4035] Null pointer in class KahaDBStore programmed

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 5.7.0
• Component/s: Message Store

Environment

Windows 7, Active MQ 5.6.0

• Assignee: Timothy A. Bish
• Reporter: Matthias Vetter
• Created: 10/Sep/12 13:29
• Updated: 11/Sep/12 03:28
• Resolved: 11/Sep/12 03:28

Description

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).