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https://issues.apache.org/jira/browse/HADOOP-5817?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12708835#action_12708835
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Hong Tang commented on HADOOP-5817:
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However, when it happens, all jobs that have tasks running on that node, or
access data from the slow node will suffer.
> Preventing node from swapping
> -----------------------------
>
> Key: HADOOP-5817
> URL: https://issues.apache.org/jira/browse/HADOOP-5817
> Project: Hadoop Core
> Issue Type: Improvement
> Components: mapred
> Reporter: Hong Tang
>
> When a node swaps, it slows everything: maps running on that node, reducers
> fetching output from the node, and DFS clients reading from the DN. We should
> just treat it the same way as if OS exhausts memory and kill some tasks to
> free up memory.
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