Re: [infinispan-dev] Transaction table cleanup

On 18 Oct 2012, at 16:41, Manik Surtani wrote: > > On 18 Oct 2012, at 17:45, Vladimir Blagojevic <vblagoje(a)redhat.com&gt; 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).