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From "Thomas Jungblut (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HAMA-359) Development of Shortest Path Finding Algorithm
Date Fri, 13 May 2011 10:57:47 GMT

    [ https://issues.apache.org/jira/browse/HAMA-359?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13032960#comment-13032960
] 

Thomas Jungblut commented on HAMA-359:
--------------------------------------

{noformat}
2011-05-13 12:55:14,227 INFO org.apache.hadoop.ipc.Server: IPC Server handler 7 on 56482,
call sync() from 127.0.0.
1:58149: error: java.io.IOException: org.apache.zookeeper.KeeperException$NoNodeException:
KeeperErrorCode = NoNode
 for /bsp/horner:61000
java.io.IOException: org.apache.zookeeper.KeeperException$NoNodeException: KeeperErrorCode
= NoNode for /bsp/horner
:61000
        at org.apache.zookeeper.KeeperException.create(KeeperException.java:102)
        at org.apache.zookeeper.KeeperException.create(KeeperException.java:42)
        at org.apache.zookeeper.ZooKeeper.delete(ZooKeeper.java:728)
        at org.apache.hama.bsp.BSPPeer.leaveBarrier(BSPPeer.java:262)
        at org.apache.hama.bsp.BSPPeer.sync(BSPPeer.java:203)
        at org.apache.hama.bsp.GroomServer.sync(GroomServer.java:924)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:508)
        at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:961)
        at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:957)
        at java.security.AccessController.doPrivileged(Native Method)
        at javax.security.auth.Subject.doAs(Subject.java:396)
        at org.apache.hadoop.ipc.Server$Handler.run(Server.java:955)
{noformat}

You're right with the barrier.

> Development of Shortest Path Finding Algorithm
> ----------------------------------------------
>
>                 Key: HAMA-359
>                 URL: https://issues.apache.org/jira/browse/HAMA-359
>             Project: Hama
>          Issue Type: New Feature
>          Components: examples
>    Affects Versions: 0.2.0
>            Reporter: Edward J. Yoon
>            Assignee: Thomas Jungblut
>              Labels: gsoc, gsoc2011, mentor
>             Fix For: 0.3.0
>
>         Attachments: HAMA-359-v2.patch, HAMA-359-v3.patch, HAMA-359-v4.patch, HAMA-359.patch,
eddie.patch
>
>   Original Estimate: 2016h
>  Remaining Estimate: 2016h
>
> The goal of this project is development of parallel algorithm for finding a Shortest
Path using Hama BSP.

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