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https://issues.apache.org/jira/browse/HADOOP-13738?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15627291#comment-15627291
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Hudson commented on HADOOP-13738:
---------------------------------
SUCCESS: Integrated in Jenkins build Hadoop-trunk-Commit #10750 (See
[https://builds.apache.org/job/Hadoop-trunk-Commit/10750/])
HADOOP-13738. DiskChecker should perform some disk IO. (arp: rev
1b6ecaf016aaf7f6a09a4d576294b5e0a6850a1f)
* (edit)
hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/util/TestDiskChecker.java
* (edit)
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/util/DiskChecker.java
> 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
> Fix For: 2.9.0, 3.0.0-alpha2
>
> Attachments: HADOOP-13738.01.patch, HADOOP-13738.02.patch,
> HADOOP-13738.03.patch, HADOOP-13738.04.patch, HADOOP-13738.05.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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