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From "Edward J. Yoon (Reopened) (JIRA)" <j...@apache.org>
Subject [jira] [Reopened] (HAMA-489) Check port availability before forking child process
Date Wed, 21 Dec 2011 08:53:30 GMT

     [ https://issues.apache.org/jira/browse/HAMA-489?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Edward J. Yoon reopened HAMA-489:
---------------------------------


{code}

2011-12-21 17:47:34,710 INFO org.apache.hama.bsp.GroomServer: Launch 1 tasks.
2011-12-21 17:47:34,710 ERROR org.apache.hama.bsp.GroomServer: Fail to execute directive.
java.lang.ClassCastException: org.apache.hama.bsp.KillTaskAction cannot be cast to org.apache.hama.bsp.LaunchTaskAction
        at org.apache.hama.bsp.GroomServer$DispatchTasksHandler.handle(GroomServer.java:153)
        at org.apache.hama.bsp.GroomServer$Instructor.run(GroomServer.java:204)
2011-12-21 17:47:34,711 INFO org.apache.hama.bsp.GroomServer: Launch 1 tasks.
2011-12-21 17:47:34,711 ERROR org.apache.hama.bsp.GroomServer: Fail to execute directive.
java.lang.ClassCastException: org.apache.hama.bsp.KillTaskAction cannot be cast to org.apache.hama.bsp.LaunchTaskAction
        at org.apache.hama.bsp.GroomServer$DispatchTasksHandler.handle(GroomServer.java:153)
        at org.apache.hama.bsp.GroomServer$Instructor.run(GroomServer.java:204)
2011-12-21 17:47:34,712 INFO org.apache.hama.bsp.GroomServer: Launch 1 tasks.
2011-12-21 17:47:34,712 ERROR org.apache.hama.bsp.GroomServer: Fail to execute directive.
java.lang.ClassCastException: org.apache.hama.bsp.KillTaskAction cannot be cast to org.apache.hama.bsp.LaunchTaskAction
        at org.apache.hama.bsp.GroomServer$DispatchTasksHandler.handle(GroomServer.java:153)
        at org.apache.hama.bsp.GroomServer$Instructor.run(GroomServer.java:204)
2011-12-21 17:47:34,712 INFO org.apache.hama.bsp.GroomServer: Launch 1 tasks.
2011-12-21 17:47:34,712 ERROR org.apache.hama.bsp.GroomServer: Fail to execute directive.
java.lang.ClassCastException: org.apache.hama.bsp.KillTaskAction cannot be cast to org.apache.hama.bsp.LaunchTaskAction
        at org.apache.hama.bsp.GroomServer$DispatchTasksHandler.handle(GroomServer.java:153)
        at org.apache.hama.bsp.GroomServer$Instructor.run(GroomServer.java:204)
2011-12-21 17:47:34,713 INFO org.apache.hama.bsp.GroomServer: Launch 1 tasks.
2011-12-21 17:47:34,713 ERROR org.apache.hama.bsp.GroomServer: Fail to execute directive.
java.lang.ClassCastException: org.apache.hama.bsp.KillTaskAction cannot be cast to org.apache.hama.bsp.LaunchTaskAction
        at org.apache.hama.bsp.GroomServer$DispatchTasksHandler.handle(GroomServer.java:153)
        at org.apache.hama.bsp.GroomServer$Instructor.run(GroomServer.java:204)
{code}
                
> Check port availability before forking child process
> ----------------------------------------------------
>
>                 Key: HAMA-489
>                 URL: https://issues.apache.org/jira/browse/HAMA-489
>             Project: Hama
>          Issue Type: Bug
>          Components: bsp
>    Affects Versions: 0.3.0
>            Reporter: Edward J. Yoon
>            Assignee: Edward J. Yoon
>             Fix For: 0.4.0
>
>         Attachments: HAMA-489.patch
>
>
> {code}
>         for (GroomServerAction action : actions) {
>           Task t = ((LaunchTaskAction) action).getTask();
>           int peerPort = (Constants.DEFAULT_PEER_PORT + i);
>           assignedPeerNames.put(t.getTaskID(), peerPort);
>           i++;
>         }
> {code}
> Increasing naively the number of port will potentially cause "already in use" error.
We may need to find next available port.

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