Joe Roberts created AMQ-3948:
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Summary: Multiple consumers retrieving same message from ActiveMQ
Key: AMQ-3948
URL: https://issues.apache.org/jira/browse/AMQ-3948
Project: ActiveMQ
Issue Type: Bug
Components: Broker
Affects Versions: 5.4.3
Environment: ActiveMQ 5.4.3 running on 64-bit Windows 7 OS. 64-bit
JDK.
Reporter: Joe Roberts
Fix For: NEEDS_REVIEWED
We have a java web-service (running in Jetty) that dynamically instantiates an
ActiveMQ queue and send messages to the queue - the messages are integers (i.e.
1, 2, 3, etc). We have from one to many consumers that read from this queue to
process these messages. Each consumer is started from a single process but each
consumer is running in it's own thread or process. When we have multiple
consumers running, they occasionally will pick up the same integer or message
from the queue. This is not desired. If a consumer reads a message, we don't
want other consumers to retrieve that same message. We're fairly new to
ActiveMQ but those we're telling about this issue said it should not be
happening. They think it might be that we have an ActiveMQ configuration issue.
Could be we need to set a property to prevent this. Just looking for some help.
I've attached our applicationContext-mcp-parallelization-activemq XML. We could
have configured this incorrectly. We're using the internalAmqConnectionFactory
for this queue.
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