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https://issues.apache.org/jira/browse/MAPREDUCE-3271?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13160168#comment-13160168
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Jonathan Eagles commented on MAPREDUCE-3271:
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Currently the count is now incremented upon lost nodes, but is not decremented
upon rejoin. Lost nodes list may be the same as in MAPREDUCE-3360.
> Lost nodes list and count not updated
> -------------------------------------
>
> Key: MAPREDUCE-3271
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-3271
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: mrv2
> Affects Versions: 0.23.0
> Reporter: Ramya Sunil
> Priority: Critical
> Fix For: 0.23.1
>
>
> When nodemanagers are lost, the "Lost Nodes" list and the count is not
> incremented. Either we,
> 1. Fix the lost nodes list when a nodemanager is lost - The problem with
> tracking lost nodes is, if the nodemanager joins back, there would be
> duplicate entries in active and lost nodes with different port numbers.
> 2. Do not track lost nodemanagers
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