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https://issues.apache.org/jira/browse/HADOOP-11935?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14586122#comment-14586122
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Allen Wittenauer commented on HADOOP-11935:
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{code}
forking an ls command and parsing the output.
{code}
Yikes. This is not portable at all when usernames > 8 characters are in play.
:(
> Provide optional native implementation of stat syscall.
> -------------------------------------------------------
>
> Key: HADOOP-11935
> URL: https://issues.apache.org/jira/browse/HADOOP-11935
> Project: Hadoop Common
> Issue Type: Improvement
> Components: fs, native
> Reporter: Chris Nauroth
> Attachments: HADOOP-11935-NativeIO-prelim.patch
>
>
> Currently,
> {{RawLocalFileSystem.DeprecatedRawLocalFileStatus#loadPermissionInfo}} is
> implemented as forking an {{ls}} command and parsing the output. This was
> observed to be a bottleneck in YARN-3491. This issue proposes an optional
> native implementation of a {{stat}} syscall through JNI. We would maintain
> the existing code as a fallback for systems where the native code is not
> available.
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