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Posted to dev@hbase.apache.org by "jay (JIRA)" <ji...@apache.org> on 2019/08/08 03:32:00 UTC

[jira] [Created] (HBASE-22816) confusion about the HBASE-11403 race condition issue

jay created HBASE-22816:
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             Summary: confusion about the HBASE-11403 race condition issue
                 Key: HBASE-22816
                 URL: https://issues.apache.org/jira/browse/HBASE-22816
             Project: HBase
          Issue Type: Wish
          Components: Client
    Affects Versions: 1.0.0
         Environment:    
            Reporter: jay
             Fix For: 1.3.4


Recently, when I read the hbase source code, I found a menthod which I don't understand very much. That is the class AsyncProcess.java in client package, I did not understand why the code  if (tasksInProgress.get() != oldInProgress)  break exist in the private void waitForMaximumCurrentTasks(int max) method, if the  passed parameter max = 0,then it is possible that the tasksInProgress.get() > 0 but tasksInProgress.get() != oldInProgress,then the loop breaks,it is not what we want, we need all the previos jobs is done before the loop breaks,right? In the HBASE-11403, it is added to fix the race condition,I do not know what will cause race condition. When I click the url of the Test results, it is missing. Who can tell me why the code tasksInProgress.get() != oldInProgress shoud be added there?



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