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Posted to common-dev@hadoop.apache.org by "Hudson (JIRA)" <ji...@apache.org> on 2008/08/22 14:34:50 UTC
[jira] Commented: (HADOOP-3875) Fix TaskTracker's heartbeat timer
to note the time the hearbeat RPC returned to decide next heartbeat time
[ https://issues.apache.org/jira/browse/HADOOP-3875?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12624728#action_12624728 ]
Hudson commented on HADOOP-3875:
--------------------------------
Integrated in Hadoop-trunk #581 (See [http://hudson.zones.apache.org/hudson/job/Hadoop-trunk/581/])
> Fix TaskTracker's heartbeat timer to note the time the hearbeat RPC returned to decide next heartbeat time
> ----------------------------------------------------------------------------------------------------------
>
> Key: HADOOP-3875
> URL: https://issues.apache.org/jira/browse/HADOOP-3875
> Project: Hadoop Core
> Issue Type: Bug
> Components: mapred
> Affects Versions: 0.18.0
> Reporter: Arun C Murthy
> Assignee: Arun C Murthy
> Fix For: 0.19.0
>
> Attachments: HADOOP-3875_0_20080730.patch
>
>
> The tasktracker notes the time the heartbeat RPC was fired, rather than when it returned to decide when to send the next one. If the RPC spends a lot of time in the JobTracker's queue then the above exacerbates the load on the JobTracker.
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