Re: [infinispan-dev] XAResource.isSameRM
On 6 Jan 2011, at 11:48, Jonathan Halliday wrote:
> Is it common/possible for people to use TM _without_ recovery? If so, this
"held heuristic completed TX" functionality should be configurable
(enabled/disabled) in order to avoid memory leaks (no recovery means .forget never gets
called)
It is not common. That said, JBossTS has for similar reasons
got a 'give up after N hours' config option which will
eventually abandon tx that have not recovered. It's off
(i.e. never give up) by default but a small number of users
find it handy. Most just use the admin tooling to manually
clean up the small number of unrecoverable situations - it's
safer in most cases.
That option is there because sometimes machines don't recover. The assumption behind
transactions is that failed machines do eventually recover, but the realities are
sometimes slightly different. Or sys admins decide to recover a machine's state on a
different machine, with a different IP address, and expect things (e.g., the TM) to be
omniscient and figure it all out ;-)
Mark.
---
Mark Little
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