[jira] [Created] (MAPREDUCE-5613) DefaultSpeculator.statusUpdate wastes CPU for task attempt id hashing and lookups in an unused empty CHM

[Gera Shegalov (JIRA)]

Gera Shegalov created MAPREDUCE-5613:
----------------------------------------

             Summary: DefaultSpeculator.statusUpdate wastes CPU for task 
attempt id hashing and lookups in an unused empty CHM
                 Key: MAPREDUCE-5613
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-5613
             Project: Hadoop Map/Reduce
          Issue Type: Bug
          Components: applicationmaster
            Reporter: Gera Shegalov


The only way pendingSpeculations is used:
{code}
     // If the task is already known to be speculation-bait, don't do anything  
 
      if (pendingSpeculations.get(task) != null) {                              
  
        if (pendingSpeculations.get(task).get()) {                              
  
          return;                                                               
  
        }                                                                       
  
      } 
{code}



--
This message was sent by Atlassian JIRA
(v6.1#6144)