On 18 Oct 2012, at 16:41, Manik Surtani wrote:
On 18 Oct 2012, at 17:45, Vladimir Blagojevic <vblagoje(a)redhat.com> wrote:
> Hey guys,
>
> Investigating why EmbeddedCacheManager#cacheRemove hiccups
> DistributedTwoNodesMapReduceTest. As you might recall upon end of
> MapReduceTask there is EmbeddedCacheManager#cacheRemove call to remove
> intermediate caches across the cluster.
I think you meant ECM#removeCache?
> Very often, almost every test
> run, execution of cache remove is blocked by ongoing transactions that
> have not completed - more specifically TransactionTable shows pending
> remote transaction. This in turn prevents cache stop call, which in turn
> causes a timeout on cache remove thus failing the test.
>
> MapReduce uses txs in MapReduceManagerImpl#combine - it might well be
> that there is smth wrong there or it could be that somehow
^^^ Does this mean that to use Map/Reduce now, we *require* that a transaction manager is
available, configured and present?
Not really. It's only that the problem
Vladimir describes only occurs when you run the MR against transactional caches (there is
a tx leak which prevents caches to stop, that should be fixed by a pull request I sent).
> TxCompletionNotificationCommand is not cleaning up remote txs. Either
> way I would appreciate some help here - Mircea?
>
> Regards,
> Vladimir
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--
Manik Surtani
manik(a)jboss.org
twitter.com/maniksurtani
Platform Architect, JBoss Data Grid
http://red.ht/data-grid
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Mircea Markus
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www.infinispan.org)