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From "Amareshwari Sriramadasu (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-5525) Provide a way to query job tracker about its daemon thread's status
Date Fri, 20 Mar 2009 08:52:51 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-5525?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12683799#action_12683799
] 

Amareshwari Sriramadasu commented on HADOOP-5525:
-------------------------------------------------

ThreadStatus could contain thread name, and its state: WAITING, TIMED_WAITING, RUNNABLE, BLOCKED,
TERMINATED. 
getClusterStatus() RPC can include required JT thread statuses. 
We can provide an option bin/hadoop job -threads to display the thread statuses.

Thoughts?

> Provide a way to query job tracker about its daemon thread's status
> -------------------------------------------------------------------
>
>                 Key: HADOOP-5525
>                 URL: https://issues.apache.org/jira/browse/HADOOP-5525
>             Project: Hadoop Core
>          Issue Type: New Feature
>          Components: mapred
>            Reporter: Amareshwari Sriramadasu
>            Assignee: Amareshwari Sriramadasu
>             Fix For: 0.21.0
>
>
> Admin needs to know the status of all threads in JobTracker (whether they are alive or
not) at any point of time. This helps alot in debugging crashes.

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