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https://issues.apache.org/jira/browse/HADOOP-11415?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14249170#comment-14249170
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Chris Nauroth commented on HADOOP-11415:
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See this comment for a proposed solution using JNI to call {{fchmod}}:
https://issues.apache.org/jira/browse/HADOOP-11321?focusedCommentId=14233329&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-14233329
Note that just creating the file or directory with specific permissions
initially may be insufficient, because the existing contract of {{FileSystem}}
basically guarantees that the process umask is not a factor. That's discussed
in more detail here:
https://issues.apache.org/jira/browse/HADOOP-11321?focusedCommentId=14230778&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-14230778
> Local file system on Linux may create files and directories initially with
> wider permissions than intended.
> -----------------------------------------------------------------------------------------------------------
>
> Key: HADOOP-11415
> URL: https://issues.apache.org/jira/browse/HADOOP-11415
> Project: Hadoop Common
> Issue Type: Bug
> Components: fs
> Reporter: Chris Nauroth
>
> As discussed in HADOOP-11321, the local file system implements file and
> directory creation as a two-step process: create followed by chmod to set the
> caller's requested permissions. This causes a brief window in which the new
> file or directory may have wider permissions than what the caller requested.
> HADOOP-11321 fixed this specifically for Windows as a side effect of fixing a
> bug in writing to an SMB share. This issue tracks fixing it specifically for
> Linux.
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