Questions about NFS3 NLM，NSM lock error： Client(rpcbind ,rpc-statd/nfslock server is ok， rpc.statd running )： in nfs-ganesha mount point： touch f1； exec 200>f1; flock -xn 200 [error: on lock available ] Server nfs-ganesha log: nsm_monitor :Can not monitor ::ffff:10.10.10.102 SM_MON ret 5 : RPC: Timed out client rpcdebug log : Jul 13 15:28:51 cu09 kernel: lockd: get host 10.10.10.212 Jul 13 15:28:51 cu09 kernel: lockd: get host 10.10.10.212 Jul 13 15:28:51 cu09 kernel: lockd: nsm_monitor(10.10.10.212) Jul 13 15:28:51 cu09 kernel: lockd: call procedure 2 on 10.10.10.212 Jul 13 15:28:51 cu09 kernel: lockd: nlm_bind_host 10.10.10.212 (10.10.10.212) Jul 13 15:28:51 cu09 kernel: lockd: next rebind in 60000 jiffies Jul 13 15:29:16 cu09 kernel: lockd: server returns status 2 Jul 13 15:29:16 cu09 kernel: lockd: release client host 10.10.10.212 Jul 13 15:29:16 cu09 kernel: lockd: release client host 10.10.10.212 Jul 13 15:29:16 cu09 kernel: lockd: clnt proc returns -37 What is the cause of the above? 【Client】 [root@fat01 ~]# uname -a Linux fat01 3.10.0-862.el7.x86_64 #1 SMP Fri Apr 20 16:44:24 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux [root@fat01 ~]# [root@fat01 ~]# lsb_release -a LSB Version: :core-4.1-amd64:core-4.1-noarch:cxx-4.1-amd64:cxx-4.1-noarch:desktop-4.1-amd64:desktop-4.1-noarch:languages-4.1-amd64:languages-4.1-noarch:printing-4.1-amd64:printing-4.1-noarch Distributor ID: CentOS Description: CentOS Linux release 7.5.1804 (Core) Release: 7.5.1804 Codename: Core root@fat01 ~]# rpm -qa|grep nfs texlive-psnfss-svn23394.9.2a-38.el7.noarch libnfsidmap-0.25-19.el7.x86_64 nfs-utils-1.3.0-0.54.el7.x86_64 texlive-mfnfss-svn19410.0-38.el7.noarch nfs4-acl-tools-0.3.3-17.el7.x86_64 [root@fat01 ~]# rpm -qa|grep rpc xmlrpc-c-client-1.32.5-1905.svn2451.el7.x86_64 xmlrpc-c-1.32.5-1905.svn2451.el7.x86_64 rpcbind-0.2.0-44.el7.x86_64 libtirpc-0.2.4-0.10.el7.x86_64 kdepimlibs-kxmlrpcclient-4.10.5-4.el7.x86_64 【server】 ganesha:NFS-Ganesha Release = V2.7.3