Gera Shegalov created HADOOP-10191:
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             Summary: Missing executable permission on viewfs internal dirs
                 Key: HADOOP-10191
                 URL: https://issues.apache.org/jira/browse/HADOOP-10191
             Project: Hadoop Common
          Issue Type: Bug
          Components: viewfs
            Reporter: Gera Shegalov


ViewFileSystem allows 1) unconditional listing of internal directories (mount 
points) and 2) and changing work directories.

1) requires read permission
2) requires executable permission

However, the hardcoded PERMISSION_RRR == 444 for FileStatus representing an 
internal dir does not have executable bit set.

This confuses YARN localizer for public resources on viewfs because it requires 
executable permission for "other" on all of the ancestor directories of the 
resource. 

{code}
java.io.IOException: Resource viewfs:/pubcache/cache.txt is not publicly 
accessable and as such cannot be part of the public cache.
        at org.apache.hadoop.yarn.util.FSDownload.copy(FSDownload.java:182)
        at org.apache.hadoop.yarn.util.FSDownload.access$000(FSDownload.java:51)
        at org.apache.hadoop.yarn.util.FSDownload$1.run(FSDownload.java:279)
        at org.apache.hadoop.yarn.util.FSDownload$1.run(FSDownload.java:277)
{code}



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