Checking NFS stats
[root@vm-pat4-app03 ~]# nfsstat -c Client rpc stats: calls retrans authrefrsh 2966934 82 0
Checking RPC as a result of retransmits seen:
[root@vm-pat4-app03 ~]# rpcinfo -t 192.168.107.50 nlockmgr program 100021 version 1 ready and waiting rpcinfo: RPC: Program/version mismatch; low version = 1, high version = 4 program 100021 version 2 is not available program 100021 version 3 ready and waiting program 100021 version 4 ready and waiting [root@vm-pat4-app03 ~]# [root@vm-pat4-app03 ~]# [root@vm-pat4-app03 ~]# rpcinfo -u 192.168.107.50 nlockmgr program 100021 version 1 ready and waiting rpcinfo: RPC: Program/version mismatch; low version = 1, high version = 4 program 100021 version 2 is not available program 100021 version 3 ready and waiting program 100021 version 4 ready and waiting
Debugging RPC
rpcdebug -m <nfs|nfsd> -s <proc|all>
then check /var/log/messages. To clear the flags, use -c