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From "Bennie Schut (JIRA)" <j...@apache.org>
Subject [jira] Created: (HIVE-1671) multithreading on Context.pathToCS
Date Mon, 27 Sep 2010 10:04:35 GMT
multithreading on Context.pathToCS
----------------------------------

                 Key: HIVE-1671
                 URL: https://issues.apache.org/jira/browse/HIVE-1671
             Project: Hadoop Hive
          Issue Type: Bug
          Components: Query Processor
            Reporter: Bennie Schut
             Fix For: 0.7.0


we having 2 threads running at 100%

With a stacktrace like this:

"Thread-16725" prio=10 tid=0x00007ff410662000 nid=0x497d runnable [0x00000000442eb000]
   java.lang.Thread.State: RUNNABLE
        at java.util.HashMap.get(HashMap.java:303)
        at org.apache.hadoop.hive.ql.Context.getCS(Context.java:524)
        at org.apache.hadoop.hive.ql.exec.Utilities.getInputSummary(Utilities.java:1369)
        at org.apache.hadoop.hive.ql.exec.MapRedTask.estimateNumberOfReducers(MapRedTask.java:329)
        at org.apache.hadoop.hive.ql.exec.MapRedTask.setNumberOfReducers(MapRedTask.java:297)
        at org.apache.hadoop.hive.ql.exec.MapRedTask.execute(MapRedTask.java:84)
        at org.apache.hadoop.hive.ql.exec.Task.executeTask(Task.java:108)
        at org.apache.hadoop.hive.ql.exec.TaskRunner.runSequential(TaskRunner.java:55)
        at org.apache.hadoop.hive.ql.exec.TaskRunner.run(TaskRunner.java:47)


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