Yesha Vora created HDFS-6445:
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Summary: 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
Reporter: Yesha Vora
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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