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From "Hemanth Yamijala (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-2924) HOD is trying to bring up task tracker on port which is already in close_wait state
Date Mon, 10 Mar 2008 09:03:48 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-2924?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12576901#action_12576901
] 

Hemanth Yamijala commented on HADOOP-2924:
------------------------------------------

Couple of comments:

- We should print the error message from socket.error. This will help us debug problems better,
given the very core nature of the change we are making to the port detection method.
- We should also decrement the value of retries in case we get socket.error. This is not being
done even currently, but, I think, is clearly intended.
- Recommend removing the unused methods. I've checked they are indeed unused.

> HOD is trying to bring up task tracker on  port which is already in close_wait state
> ------------------------------------------------------------------------------------
>
>                 Key: HADOOP-2924
>                 URL: https://issues.apache.org/jira/browse/HADOOP-2924
>             Project: Hadoop Core
>          Issue Type: Bug
>          Components: contrib/hod
>    Affects Versions: 0.16.0
>            Reporter: Aroop Maliakkal
>            Assignee: Vinod Kumar Vavilapalli
>            Priority: Critical
>             Fix For: 0.17.0
>
>         Attachments: HADOOP-2924
>
>
> While bringing up task tracker using random ports, HOD is not checking whether the port
is in CLOSE_WAIT state. So when it starts task tracker, we will be getting an address bind
error on that port. We can avoid this error if we check for CLOSE_WAIT state on that port
before starting the tasktracker.

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