Jinho Kim created TAJO-1047:
-------------------------------
Summary: DefaultTaskScheduler:allocateRackTask is failed
occasionally on JDK 1.7
Key: TAJO-1047
URL: https://issues.apache.org/jira/browse/TAJO-1047
Project: Tajo
Issue Type: Bug
Components: query master
Reporter: Jinho Kim
Assignee: Jinho Kim
It is multi thread issue.
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2014-09-03 05:17:14,378 FATAL org.apache.tajo.master.DefaultTaskScheduler:
Comparison method violates its general contract!
java.lang.IllegalArgumentException: Comparison method violates its general
contract!
at java.util.TimSort.mergeLo(TimSort.java:747)
at java.util.TimSort.mergeAt(TimSort.java:483)
at java.util.TimSort.mergeForceCollapse(TimSort.java:426)
at java.util.TimSort.sort(TimSort.java:223)
at java.util.TimSort.sort(TimSort.java:173)
at java.util.Arrays.sort(Arrays.java:659)
at java.util.Collections.sort(Collections.java:217)
at
org.apache.tajo.master.DefaultTaskScheduler$ScheduledRequests.allocateRackTask(DefaultTaskScheduler.java:678)
at
org.apache.tajo.master.DefaultTaskScheduler$ScheduledRequests.assignToLeafTasks(DefaultTaskScheduler.java:798)
at
org.apache.tajo.master.DefaultTaskScheduler.schedule(DefaultTaskScheduler.java:154)
at
org.apache.tajo.master.DefaultTaskScheduler$1.run(DefaultTaskScheduler.java:95)
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