Yesha Vora created HDFS-6446:
--------------------------------
Summary: NFS: Different error messages for appending/writing data
from read only mount
Key: HDFS-6446
URL: https://issues.apache.org/jira/browse/HDFS-6446
Project: Hadoop HDFS
Issue Type: Bug
Reporter: Yesha Vora
steps:
1) set dfs.nfs.exports.allowed.hosts = <nfs_client> ro
2) Restart nfs server
3) Append data on file present on hdfs from read only mount point
Append data
{noformat}
bash$ cat /tmp/tmp_10MB.txt >> /tmp/tmp_mnt/expected_data_stream
cat: write error: Input/output error
{noformat}
4) Write data from read only mount point
Copy data
{noformat}
bash$ cp /tmp/tmp_10MB.txt /tmp/tmp_mnt/tmp/
cp: cannot create regular file `/tmp/tmp_mnt/tmp/tmp_10MB.txt': Permission
denied
{noformat}
Both operations are treated differently. Copying data returns valid error
message: 'Permission denied' . Though append data does not return valid error
message
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