[jira] [Created] (HDFS-7733) NFS: readdir/readdirplus return null directory attribute on failure

[Arpit Agarwal (JIRA)]

Arpit Agarwal created HDFS-7733:
-----------------------------------

             Summary: NFS: readdir/readdirplus return null directory attribute 
on failure
                 Key: HDFS-7733
                 URL: https://issues.apache.org/jira/browse/HDFS-7733
             Project: Hadoop HDFS
          Issue Type: Bug
          Components: nfs
    Affects Versions: 2.6.0
            Reporter: Arpit Agarwal


NFS readdir and readdirplus operations return a null directory attribute on 
some failure path. This causes clients to get a 'Stale file handle' error which 
can only be fixed by unmounting and remounting the share.

The issue can be reproduced by running 'ls' against a large directory which is 
being actively modified, triggering the 'cookie mismatch' failure path.

{code}
        } else {
          LOG.error("cookieverf mismatch. request cookieverf: " + cookieVerf
              + " dir cookieverf: " + dirStatus.getModificationTime());
          return new READDIRPLUS3Response(Nfs3Status.NFS3ERR_BAD_COOKIE);
        }
{code}

Thanks to [~brandonli] for catching the issue.




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