Broker Deadlock when limiting size of temp store, and using VirtualTopics
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Key: AMQ-3061
URL: https://issues.apache.org/jira/browse/AMQ-3061
Project: ActiveMQ
Issue Type: Bug
Components: Broker
Affects Versions: 5.4.1, 5.3.2
Environment: Mac 10.6.5 (and Linux Centos)
Reporter: Dominic Tootell
When limiting the Temp Table space the broker will dead lock:
- 1 Producer Thread (own connection) writing to VirtualTopic.FooTwo
-- writes 40000 messages
- 2 Consumer Threads (each own connection) consuming from
Consumer.X.VirtualTopic.FooTwo
-- consumes message (auto ack - but message ack for good measure - delay of
100ms between consumption)
The dead lock occurs when using the either the KahaDB or ActiveMQPersistence
persistence, and seems more related to the KahaDB implementation used for the
Temp storage area.
I shall attach a test jar, which is a executable jar, from which the issue can
be replicated (I shall attach a zip of the source too - maven project)
The tests can be run as:
- java -classpath 5.4.1-deadlock-jar-with-dependencies.jar
bbc.forge.domt.activemq.investigation.KahaDBTempStorageDeadlockReplication54Test
or
- java -classpath 5.4.1-deadlock-jar-with-dependencies.jar
bbc.forge.domt.activemq.investigation.TempStorageDeadlockReplication54Test
These classes are also Unit Test Cases.
- Producer logs to producer.log
- Consumes log to consumer.log
- A Monitor thread just run in the background that detail the number of
messages sent and consumed... logs to monitor.log
- tests write to the dir *{{target/activemq-data}}*
To disable limiting the temp storage add the System property
*{{limit.temp=false}}*, i.e.
- java -Dlimit.temp=false -classpath 5.4.1-deadlock-jar-with-dependencies.jar
bbc.forge.domt.activemq.investigation.TempStorageDeadlockReplication54Test
This seems to be a different/additional issue to AMQ-2475
thanks in advance, let me know if you need any more information.
/dom
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