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https://issues.apache.org/jira/browse/HDFS-6445?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Brandon Li resolved HDFS-6445.
------------------------------
Resolution: Duplicate
> NFS: Add a log message 'Permission denied' while writing data from read only
> mountpoint
> ---------------------------------------------------------------------------------------
>
> Key: HDFS-6445
> URL: https://issues.apache.org/jira/browse/HDFS-6445
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: nfs
> Reporter: Yesha Vora
> Assignee: Brandon Li
>
> Add a log message in NFS log file when a write operation is performed on read
> only mount point
> steps:
> 1) set dfs.nfs.exports.allowed.hosts = <nfsclient> ro
> 2) Restart nfs server
> 3) Append data on file present on hdfs
> {noformat}
> bash: cat /tmp/tmp_10MB.txt >> /tmp/tmp_mnt/expected_data_stream
> cat: write error: Input/output error
> {noformat}
> The real reason for append operation failure is permission denied. It should
> be printed in nfs logs. currently, nfs log prints below messages.
> {noformat}
> 2014-05-22 21:50:56,068 DEBUG nfs3.RpcProgramNfs3
> (RpcProgramNfs3.java:write(731)) - NFS WRITE fileId: 16493 offset: 7340032
> length:1048576 stableHow:0 xid:1904385849
> 2014-05-22 21:50:56,076 DEBUG nfs3.RpcProgramNfs3
> (RpcProgramNfs3.java:handleInternal(1936)) -
> WRITE_RPC_CALL_START____1921163065
> 2014-05-22 21:50:56,078 DEBUG nfs3.RpcProgramNfs3
> (RpcProgramNfs3.java:write(731)) - NFS WRITE fileId: 16493 offset: 8388608
> length:1048576 stableHow:0 xid:1921163065
> 2014-05-22 21:50:56,086 DEBUG nfs3.RpcProgramNfs3
> (RpcProgramNfs3.java:handleInternal(1936)) -
> WRITE_RPC_CALL_START____1937940281
> 2014-05-22 21:50:56,087 DEBUG nfs3.RpcProgramNfs3
> (RpcProgramNfs3.java:write(731)) - NFS WRITE fileId: 16493 offset: 9437184
> length:1048576 stableHow:0 xid:1937940281
> 2014-05-22 21:50:56,091 DEBUG nfs3.RpcProgramNfs3
> (RpcProgramNfs3.java:handleInternal(1936)) -
> WRITE_RPC_CALL_START____1954717497
> 2014-05-22 21:50:56,091 DEBUG nfs3.RpcProgramNfs3
> (RpcProgramNfs3.java:write(731)) - NFS WRITE fileId: 16493 offset: 10485760
> length:168 stableHow:0 xid:1954717497
> {noformat}
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