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solution of DNS server start lead to client time out and permission denied

Publication Date:  2012-09-20 Views:  78 Downloads:  0
Issue Description
1、 client mount file system sometimes comes timeout,try for several times mount again :
2、 some client is denied when mounting:
3、 NPS service state is normal via support,node runs well。
4、 NFS service of master account is normal:
N8000> nfs server status
NFS Status on N8000_01 : ONLINE
NFS Status on N8000_02 : ONLINE
NFS Status on N8000_03 : ONLINE
NFS Status on N8000_04 : ONLINE
NFS Status on N8000_05 : ONLINE
NFS Status on N8000_06 : ONLINE
NFS Status on N8000_07 : ONLINE
NFS Status on N8000_08 : ONLINE
NFS Status on N8000_09 : ONLINE
NFS Status on N8000_10 : ONLINE
NFS Status on N8000_11 : ONLINE
NFS Status on N8000_12 : ONLINE
Alarm Information
1、TB_Storage_Monitor.cm3:/>#mount -t nfs /fs02
mount: mount to NFS server '' failed: timed out (retrying).
TB_Storage_Monitor.cm3:/>#mount -t nfs /fs02
mount: mount to NFS server '' failed: timed out (retrying)。
2、mount -t nfs  /home/admin/pamirsmckinley/pcr
mount: failed, reason given by server: Permission denied
Handling Process
1、 disable DNS service,network DNS disable under master account;
2、 delete all share of file system;
3、 share IP of file system as regulation;
4、client mounts file system again and it is no problem.
Root Cause
1、client mount time out:when client visits nfs server,if dns is open,nfs server will inquire about client name in dns,but dns does not exist,it is about 10 seconds for inquire time out,so client is going to be overtime and cannot mount .
2、client permission is denied, and it is probably because ofDNS enable.
DNS is on after N8000 initialization. If you don’t need DNS service,you should set DNS to Disable by hand.