Ken Liao created AMQ-9594:
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Summary: Limit storage for temporary transactions store files.
Key: AMQ-9594
URL: https://issues.apache.org/jira/browse/AMQ-9594
Project: ActiveMQ Classic
Issue Type: Improvement
Components: KahaDB
Affects Versions: 5.18.4
Reporter: Ken Liao
Currently when a transaction is inflight, it will generate temporary files in
the data store. With name tx-*.tmp. However size of those files are not
accounted for in the TempStorage limit configurable on ActiveMQ. As a result,
in certain cases, there could be huge dangling tmp files due to unclean
shutdown (as indicated in https://issues.apache.org/jira/browse/AMQ-4267 and
https://users.activemq.apache.narkive.com/weIikSfX/size-limitation-for-tx-tmp-file.
In certain cases, up to 500GB.
The proposal here is to count those tmp files in the TempStorage limit already
provided (used to store non-persistent transient messages) or in a different
limit. By doing that, it will cause producer flow control to improve stability
of the broker.
That said, the scenario for triggering large dangling tmp files is still
unknown. Once the root cause is configured out, a separate ticket will be filed
to keep track of it.
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