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https://issues.apache.org/jira/browse/HAMA-413?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13090823#comment-13090823
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Edward J. Yoon commented on HAMA-413:
-------------------------------------
[NOTE] just found another issue:
{code}
2011-08-25 15:50:39,042 INFO org.apache.hama.bsp.TaskRunner:
attempt_201108251548_0001_000005_0 11/08/25 15:50:39 INFO bsp.BSPPeer: >>>
cnode2.ucloud:61000
2011-08-25 15:50:39,042 INFO org.apache.hama.bsp.TaskRunner:
attempt_201108251548_0001_000005_0 11/08/25 15:50:39 INFO bsp.BSPPeer: 6, 6
2011-08-25 15:50:49,183 INFO org.apache.hadoop.ipc.Server: Error register
incrementSuperstepCount
java.lang.IllegalArgumentException: Duplicate
metricsName:incrementSuperstepCount
at
org.apache.hadoop.metrics.util.MetricsRegistry.add(MetricsRegistry.java:53)
at
org.apache.hadoop.metrics.util.MetricsTimeVaryingRate.<init>(MetricsTimeVaryingRate.java:89)
at
org.apache.hadoop.metrics.util.MetricsTimeVaryingRate.<init>(MetricsTimeVaryingRate.java:99)
at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:523)
at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:959)
at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:955)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:396)
at org.apache.hadoop.ipc.Server$Handler.run(Server.java:953)
{code}
> Remove limitation on the number of tasks
> ----------------------------------------
>
> Key: HAMA-413
> URL: https://issues.apache.org/jira/browse/HAMA-413
> Project: Hama
> Issue Type: Sub-task
> Components: bsp
> Affects Versions: 0.3.0
> Reporter: Edward J. Yoon
> Assignee: Edward J. Yoon
> Fix For: 0.4.0
>
> Attachments: HAMA-413_v01.patch, HAMA-413_v02.patch,
> HAMA-413_v03.patch, HAMA-413_v05.patch, HAMA_413_v04.patch
>
>
> By HAMA-410 patch, BSPPeer object will be constructed at child process. Now
> we can just remove limitation on the number of tasks.
> Here's TODO list:
> 1. The number of tasks per groom should be configurable e.g.,
> 'bsp.local.tasks.maximum'.
> 2. The 'totalTaskCapacity' should be calculated at
> BSPMaster.getClusterStatus().
> 3. When scheduling tasks, consider how to allocate them.
> 4. Each BSPPeer should know all created peers of Hama cluster by job. It can
> be listed based on actions of GroomServer.
> 5. In examples, 'cluster.getGroomServers()' can be changed to
> 'cluster.getMaxTasks()'.
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