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https://issues.apache.org/jira/browse/YARN-7244?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16180516#comment-16180516
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Bibin A Chundatt commented on YARN-7244:
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Thank you [~kshukla] for patch. Minor comments from my side
# Better to check directory exists first if we are not concerned of permission
. thoughts?
{code}
348 if (ctx.localFS.mkdirs(tmpDir) || ctx.localFS.exists(tmpDir))
{code}
# Testcase is successful even if YARN_SHUFFLE_BAD_DIRS_FILTER_ENABLED set to
false.
{code}
conf.setBoolean(
YarnConfiguration.YARN_SHUFFLE_BAD_DIRS_FILTER_ENABLED, false);
{code}
> ShuffleHandler is not aware of disks that are added
> ---------------------------------------------------
>
> Key: YARN-7244
> URL: https://issues.apache.org/jira/browse/YARN-7244
> Project: Hadoop YARN
> Issue Type: Bug
> Reporter: Kuhu Shukla
> Assignee: Kuhu Shukla
> Attachments: YARN-7244.001.patch, YARN-7244.002.patch
>
>
> The ShuffleHandler permanently remembers the list of "good" disks on NM
> startup. If disks later are added to the node then map tasks will start using
> them but the ShuffleHandler will not be aware of them. The end result is that
> the data cannot be shuffled from the node leading to fetch failures and
> re-runs of the map tasks.
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