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HBase Review Board commented on HIVE-1671: ------------------------------------------ Message from: "Bennie Schut" <ben...@schut.cc> ----------------------------------------------------------- This is an automatically generated e-mail. To reply, visit: http://review.cloudera.org/r/909/ ----------------------------------------------------------- Review request for Hive Developers. Summary ------- simple change HashMap into ConcurrentHashMap This addresses bug HIVE-1671. http://issues.apache.org/jira/browse/HIVE-1671 Diffs ----- trunk/ql/src/java/org/apache/hadoop/hive/ql/Context.java 1001658 Diff: http://review.cloudera.org/r/909/diff Testing ------- Thanks, Bennie > 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 > Assignee: Bennie Schut > Fix For: 0.7.0 > > Attachments: HIVE-1671-1.patch > > > 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) -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.