<html><head><meta http-equiv="Content-Type" content="text/html charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><br><div><div>On 19 Oct 2012, at 02:44, Mircea Markus <<a href="mailto:mircea.markus@jboss.com">mircea.markus@jboss.com</a>> wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><br><div><div>On 18 Oct 2012, at 18:21, Manik Surtani wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><span class="Apple-style-span" style="border-collapse: separate; font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; "><div>On 19 Oct 2012, at 02:19, Mircea Markus <<a href="mailto:mircea.markus@jboss.com">mircea.markus@jboss.com</a>> wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><br><div><div>On 18 Oct 2012, at 16:41, Manik Surtani wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><br><div><div>On 18 Oct 2012, at 17:45, Vladimir Blagojevic <<a href="mailto:vblagoje@redhat.com">vblagoje@redhat.com</a>> wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite">Hey guys,<br><br>Investigating why EmbeddedCacheManager#cacheRemove hiccups<span class="Apple-converted-space"> </span><br>DistributedTwoNodesMapReduceTest. As you might recall upon end of<span class="Apple-converted-space"> </span><br>MapReduceTask there is EmbeddedCacheManager#cacheRemove call to remove<span class="Apple-converted-space"> </span><br>intermediate caches across the cluster.</blockquote></div></div></blockquote>I think you meant ECM#removeCache?<br><blockquote type="cite"><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><blockquote type="cite">Very often, almost every test<span class="Apple-converted-space"> </span><br>run, execution of cache remove is blocked by ongoing transactions that<span class="Apple-converted-space"> </span><br>have not completed - more specifically TransactionTable shows pending<span class="Apple-converted-space"> </span><br>remote transaction. This in turn prevents cache stop call, which in turn<span class="Apple-converted-space"> </span><br>causes a timeout on cache remove thus failing the test.<br><br>MapReduce uses txs in MapReduceManagerImpl#combine - it might well be<span class="Apple-converted-space"> </span><br>that there is smth wrong there or it could be that somehow<span class="Apple-converted-space"> </span><br></blockquote><div><br></div><div>^^^ Does this mean that to use Map/Reduce now, we *require* that a transaction manager is available, configured and present?</div></div></blockquote>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).<br></div></div></blockquote><div><br></div><div>Ok. I was just wondering, since Vladimir did say MR uses txs in MapReduceManagerImpl#combine. Vladimir, could you pls clarify?</div></span></blockquote>You're right actually, the temporary cache created is transactional. it is built in the CreateCacheCommand and relies on the DummyTransactionManager, might be better to use batching perhaps? Or even not require for this cache to be transactional?</div></div></blockquote><div><br></div><div>Yes, we should keep such internal caches as simple as possible.</div><div><br></div></div><div apple-content-edited="true">
<span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; border-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; border-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; border-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div>--</div><div>Manik Surtani</div><div><a href="mailto:manik@jboss.org">manik@jboss.org</a></div><div><a href="http://twitter.com/maniksurtani">twitter.com/maniksurtani</a></div><div><br></div><div><div>Platform Architect, JBoss Data Grid</div><div><a href="http://red.ht/data-grid">http://red.ht/data-grid</a></div></div></div></span></div></span></div></span>
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