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https://issues.apache.org/jira/browse/HADOOP-11935?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14566954#comment-14566954
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zhihai xu commented on HADOOP-11935:
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It looks like {{java.nio.file}} doesn't support sticky bit in
[PosixFilePermission|http://docs.oracle.com/javase/7/docs/api/java/nio/file/attribute/PosixFilePermission.html].
But {{org.apache.hadoop.fs.permission.FsPermission}} supports [sticky
bit|https://github.com/apache/hadoop/blob/trunk/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/permission/FsPermission.java#L63].
> 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
>
> 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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