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https://issues.apache.org/jira/browse/HADOOP-15493?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16489910#comment-16489910
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Arpit Agarwal commented on HADOOP-15493:
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The patch looks for disk full as follows:
# Checks exception message for known strings seen on Linux/glibc and Windows.
# Checks for usable disk space below threshold (currently a conservative
100MB). We need a threshold as filesystems don't always report zero usable
space when the disk is full.
If either condition is true, then failure to write the file is ignored.
Note: no one is using this disk check yet. It will be enabled later via
HDFS-13538.
[~kihwal], could you please take a look?
> DiskChecker should handle disk full situation
> ---------------------------------------------
>
> Key: HADOOP-15493
> URL: https://issues.apache.org/jira/browse/HADOOP-15493
> Project: Hadoop Common
> Issue Type: Improvement
> Reporter: Arpit Agarwal
> Assignee: Arpit Agarwal
> Priority: Critical
> Attachments: HADOOP-15493.01.patch
>
>
> DiskChecker#checkDirWithDiskIo creates a file to verify that the disk is
> writable.
> However check should not fail when file creation fails due to disk being
> full. This avoids marking full disks as _failed_.
> Reported by [~kihwal] and [~daryn] in HADOOP-15450.
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