[
https://issues.apache.org/jira/browse/HADOOP-5817?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12708833#action_12708833
]
Hong Tang commented on HADOOP-5817:
-----------------------------------
Normally, this condition does not happen often. However, we have seen it
happens due to various reasons: mis-configured heap size (HADOOP-5725) or
processes running on that node not under control by MapReduce.
> 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.
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
