[ https://issues.apache.org/jira/browse/UIMA-4210?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Jerry Cwiklik closed UIMA-4210. ------------------------------- Resolution: Cannot Reproduce Closing since I am not able to reproduce the problem. The cause of the hang was fixed in one of the other JIRAs mentioned in the thread. > Client hangs with more than 1 time-out > -------------------------------------- > > Key: UIMA-4210 > URL: https://issues.apache.org/jira/browse/UIMA-4210 > Project: UIMA > Issue Type: Bug > Components: Async Scaleout > Affects Versions: 2.4.2AS > Environment: Java 7, Mac OS > Reporter: Frank Xu > Labels: client, hangs > Fix For: 2.9.0AS > > Original Estimate: 504h > Remaining Estimate: 504h > > The client hangs if the execution has two time-outs. After debugging into the > issue, we figure out that the resending mechanism has some bugs in it. Here > are the detailed description. > Please review the necessity for the invocation of sendCAS(). In our system, > we don't have to resend the CAS to process again. Please provide a > configuration so that we don't have to resend the CAS every time there is a > time out. > Whenever there is the first time-out, > BaseUIMAAsynchronousEngine_impl#notifyOnTimout() is invoked and it hangs when > it tries to invoke sendCas() at line 2385. I believe the reason is that the > sendCAS() is a synchronized method and a potential threading issue causes > this thread hang over there. Please be noted that this block is also > synchronized. > Then when there is a second time-out, it will be hanging in the very > beginning of the method notifyOnTimeout() and cannot clear the time-out CAS > from the CAS list, which hangs the entire client. -- This message was sent by Atlassian JIRA (v6.3.4#6332)