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Andrew Dinn updated JBTM-503:
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Fix Version/s: 4.7.0
Might as well try to get this in the next release
Shutdown the ExpiredEntryMonitor when stopping the RecoveryManager
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Key: JBTM-503
URL:
https://jira.jboss.org/jira/browse/JBTM-503
Project: JBoss Transaction Manager
Issue Type: Feature Request
Security Level: Public(Everyone can see)
Components: Recovery
Affects Versions: 4.5.0
Environment: Tomcat + Spring + DBCP + JBossJTA
Reporter: Mauro Molinari
Assignee: Andrew Dinn
Fix For: 4.7.0
Attachments: JBossTS.patch
When the recovery manager is started, the implementation RecoveryManagerImple starts the
ExpiredEntryMonitor.
When you stop the recovery manager, however, the ExpiredEntryMonitor is not shut down.
On line 250 of com.arjuna.ats.internal.arjuna.recovery.RecoveryManagerImple there's
the line ExpiredEntryMonitor.shutdown() commented out, with a "TODO why?"
comment immediately before.
I don't know exactly what should be the lifecylce of ExpiredEntryMonitor versus that
of RecoveryManagerImple, however I think that one of the following should happen:
- ExpiredEntryMonitor is started when RecoveryManagerImple is started (rather than
constructed), so that it is shut down when the RecoveryManagerImple is stopped
OTHERWISE
- RecoveryManagerImple provides a way to "dispose" or "disable" it
and this includes the shutdown of ExpiredEntryMonitor
OTHERWISE
- it is documented that stopping the recovery manager needs the ExpiredEntryMonitor to be
stopped too: however, please consider that
com.arjuna.ats.internal.arjuna.recovery.ExpiredEntryMonitor.shutdown() throws a
NullPointerException if called while the ExpiredEntryMonitor has not been started before
and there is no public method to test if it has been started or not; so if I need to write
some code that stops the ExpiredEntryMonitor (without knowing if it has been started or
not) I have to write some ugly code like:
{code:java}
try
{
ExpiredEntryMonitor.shutdown();
}
catch(final NullPointerException e)
{
// ExpiredEntryMonitor had not been started
}
{code}
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