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https://issues.apache.org/jira/browse/HADOOP-13738?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Arpit Agarwal updated HADOOP-13738:
-----------------------------------
Summary: DiskChecker should perform some disk IO (was: DiskChecker should
perform some file IO)
> DiskChecker should perform some disk IO
> ---------------------------------------
>
> Key: HADOOP-13738
> URL: https://issues.apache.org/jira/browse/HADOOP-13738
> Project: Hadoop Common
> Issue Type: Improvement
> Reporter: Arpit Agarwal
> Assignee: Arpit Agarwal
> Attachments: HADOOP-13738.01.patch
>
>
> DiskChecker can fail to detect total disk/controller failures indefinitely.
> We have seen this in real clusters. DiskChecker performs simple
> permissions-based checks on directories which do not guarantee that any disk
> IO will be attempted.
> A simple improvement is to write some data and flush it to the disk.
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