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https://issues.apache.org/jira/browse/HAMA-444?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13117943#comment-13117943
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Edward J. Yoon commented on HAMA-444:
-------------------------------------
This problem occurs especially with many tasks per node.
{code}
2011-09-30 17:17:09,885 INFO org.apache.hama.bsp.TaskRunner: Start building
BSPPeer process.
2011-09-30 17:17:10,548 INFO org.apache.hama.bsp.TaskRunner: Start building
BSPPeer process.
2011-09-30 17:17:11,180 INFO org.apache.hama.bsp.TaskRunner: Start building
BSPPeer process.
2011-09-30 17:17:11,393 INFO org.apache.hama.bsp.TaskRunner: Start building
BSPPeer process.
2011-09-30 17:17:11,642 INFO org.apache.hama.bsp.TaskRunner: Start building
BSPPeer process.
2011-09-30 17:17:12,348 INFO org.apache.hama.bsp.TaskRunner: Start building
BSPPeer process.
2011-09-30 17:17:12,637 INFO org.apache.hama.bsp.TaskRunner: Start building
BSPPeer process.
2011-09-30 17:17:13,161 INFO org.apache.hama.bsp.TaskRunner: Start building
BSPPeer process.
2011-09-30 17:17:13,555 INFO org.apache.hama.bsp.TaskRunner: Start building
BSPPeer process.
2011-09-30 17:17:14,085 INFO org.apache.hama.bsp.TaskRunner: Start building
BSPPeer process.
2011-09-30 17:17:14,396 INFO org.apache.hama.bsp.TaskRunner: Start building
BSPPeer process.
2011-09-30 17:17:14,990 INFO org.apache.hama.bsp.TaskRunner: Start building
BSPPeer process.
2011-09-30 17:17:15,469 INFO org.apache.hama.bsp.TaskRunner: Start building
BSPPeer process.
2011-09-30 17:17:16,082 INFO org.apache.hama.bsp.TaskRunner: Start building
BSPPeer process.
2011-09-30 17:17:16,428 INFO org.apache.hama.bsp.TaskRunner: Start building
BSPPeer process.
2011-09-30 17:17:17,530 INFO org.apache.hama.bsp.TaskRunner: Start building
BSPPeer process.
2011-09-30 17:17:19,156 INFO org.apache.hama.bsp.TaskRunner: Start building
BSPPeer process.
2011-09-30 17:17:19,445 INFO org.apache.hama.bsp.TaskRunner: Start building
BSPPeer process.
2011-09-30 17:17:19,620 INFO org.apache.hama.bsp.TaskRunner: Start building
BSPPeer process.
2011-09-30 17:17:19,742 INFO org.apache.hama.bsp.TaskRunner: Start building
BSPPeer process.
2011-09-30 17:17:26,780 FATAL org.apache.hama.bsp.GroomServer: Task:
attempt_201109301715_0002_000061_0 - Killed : cnode08 doesn't exists.
2011-09-30 17:17:26,832 INFO org.apache.hama.bsp.TaskRunner: Finishes executing
BSPPeer child process.
2011-09-30 17:17:26,921 INFO org.apache.hama.bsp.TaskRunner: Finishes executing
BSPPeer child process.
2011-09-30 17:17:26,992 INFO org.apache.hama.bsp.TaskRunner: Finishes executing
BSPPeer child process.
2011-09-30 17:17:27,005 INFO org.apache.hama.bsp.TaskRunner: Finishes executing
BSPPeer child process.
2011-09-30 17:17:27,005 INFO org.apache.hama.bsp.TaskRunner: Finishes executing
BSPPeer child process.
2011-09-30 17:17:27,011 INFO org.apache.hama.bsp.TaskRunner: Finishes executing
BSPPeer child process.
2011-09-30 17:17:27,027 INFO org.apache.hama.bsp.TaskRunner: Finishes executing
BSPPeer child process.
2011-09-30 17:17:27,067 INFO org.apache.hama.bsp.TaskRunner: Finishes executing
BSPPeer child process.
2011-09-30 17:17:36,828 FATAL org.apache.hama.bsp.GroomServer: Task:
attempt_201109301715_0002_000071_0 - Killed : cnode02 doesn't exists.
2011-09-30 17:17:36,858 FATAL org.apache.hama.bsp.GroomServer: Task:
attempt_201109301715_0002_000059_0 - Killed : cnode06 doesn't exists.
2011-09-30 17:17:36,874 FATAL org.apache.hama.bsp.GroomServer: Task:
attempt_201109301715_0002_000045_0 - Killed : cnode16 doesn't exists.
2011-09-30 17:17:36,888 FATAL org.apache.hama.bsp.GroomServer: Task:
attempt_201109301715_0002_000053_0 - Killed : cnode06 doesn't exists.
2011-09-30 17:17:36,897 INFO org.apache.hama.bsp.TaskRunner: Finishes executing
BSPPeer child process.
2011-09-30 17:17:36,903 INFO org.apache.hama.bsp.TaskRunner: Finishes executing
BSPPeer child process.
2011-09-30 17:17:36,946 INFO org.apache.hama.bsp.TaskRunner: Finishes executing
BSPPeer child process.
2011-09-30 17:17:36,968 INFO org.apache.hama.bsp.TaskRunner: Finishes executing
BSPPeer child process.
{code}
> All tasks should be finished at the last iteration
> --------------------------------------------------
>
> Key: HAMA-444
> URL: https://issues.apache.org/jira/browse/HAMA-444
> Project: Hama
> Issue Type: Bug
> Components: bsp
> Affects Versions: 0.3.0
> Reporter: Edward J. Yoon
> Fix For: 0.4.0
>
>
> Each BSP task can be finished differently with their each conditions. In this
> case, all tasks should be finished at the last iteration or comparison logic
> of barrier should be fixed to avoid hang problem.
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