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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