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https://jira.jboss.org/jira/browse/JBMESSAGING-1685?page=com.atlassian.ji...
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Martin Gysel updated JBMESSAGING-1685:
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hi howard, thanks for your feedback. now that all messages are received (and commited) the
OOM condition no longer occurs. i'm sorry i did not figure out the issue in the test
routine as well.
nevertheless the issue is still existent as the application guy does not issue a commit()
until the message has been successfully processed (archived the document and updated some
index tables). the application works in the same fashion as the main() method, it sleeps
for a while, retries, rolls back, sleeps again. if the scanning process is heavily used
hundreds of open messages queue up and are rolled back again and again. if the outage of
the archive system or database server takes some time, the OOM occurs sooner or later.
what is expected is that if MaxDeliveryAttempts is reached, the message is discarded (or
put to a DLQ, if defined) and the associated memory should be cleaned up. there should be
no need to issue a commit(), the memory in my opinion should be freed at the latest when
the connection is closed. as it is also done in our example (before going to sleep
again).
thanks very much for your efforts putting into this.
kind regards martin
jboss messaging / memory leak on session.rollback() operation
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Key: JBMESSAGING-1685
URL:
https://jira.jboss.org/jira/browse/JBMESSAGING-1685
Project: JBoss Messaging
Issue Type: Bug
Components: Messaging Core
Affects Versions: 1.4.3.GA
Environment: Windows Server 2003/SP2
Reporter: Martin Gysel
Assignee: Howard Gao
Fix For: 1.4.0.SP3.CP09, 1.4.5.GA
Attachments: QueueExample.java, QueueExampleLong.java, QueueExampleLong2.java,
Test100K.jpg, Test10K.jpg
we run a transacted jms application using jboss 5.1.0.GA and jboss messaging 1.4.3.GA. if
a received message could not be successfully processed, e.g. because another subsystem is
not available, the application issues a rollback() operation on the session. by default it
is presented again 10 times until it is discarded/removed. as the jms workload is quite
high sooner or later the application server ends up in out of memory conditions in heap
space.
the case can easily be reproduced with a small test application (one program sending
messages, the other one receiving). the following cases/setups have been tested and ran
into this memory leak
- close session/connection after this many rollback() operations, e.g. 100
- close session/connection after all messages have been received (and removed)
- clustered vs. not clustered makes no difference
- hypersonic vs. db2 makes no difference
- adding a DLQ makes no difference
- DeliveryMode.NON_PERSISTENT makes no difference
the same problem can also be seen with jboss 4.2.3.GA and jboss messaging 1.4.2.GA.
session.commit() operations (x thousands and more) do not lead to a leak
we do not use XA.
thanks for your help.
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