[ http://issues.apache.org/jira/browse/HADOOP-236?page=all ]
Doug Cutting updated HADOOP-236:
--------------------------------
Fix Version: 0.5.0
(was: 0.4.0)
> job tracker should refuse connection from a task tracker with a different
> version number
> ----------------------------------------------------------------------------------------
>
> Key: HADOOP-236
> URL: http://issues.apache.org/jira/browse/HADOOP-236
> Project: Hadoop
> Type: Bug
> Components: mapred
> Versions: 0.2.1
> Reporter: Hairong Kuang
> Fix For: 0.5.0
>
> After one mapred system upgrade, we noticed that all tasks assigned to one
> task tracker failed. It turned out that for some reason the task tracker was
> not upgraded.
> To avoid this, a task tracker should reports its version # when it registers
> itsself with a job tracker. If the job tracker receives an inconsistent
> version #, it should refuse the connection.
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