the showmount get stucked and outputs nothing

[jerry-yuan]

I have started a docker-nfs-server by following command:

docker run --rm \
-v NAS-Temp:/dir1 \
-v Aria2-Download:/dir2 \
-v NAS-Storage:/dir3 \
-v Transmission-Download:/dir4:ro \
-e NFS_EXPORT_0='/dir1      10.0.0.0/8(rw,async,all_squash,anonuid=0)' \
-e NFS_EXPORT_1='/dir2      10.0.0.0/8(rw,async,all_squash,anonuid=0)' \
-e NFS_EXPORT_2='/dir3      10.0.0.0/8(rw,async,all_squash,anonuid=0)' \
-e NFS_EXPORT_3='/dir4      10.0.0.0/8(ro,async,all_squash,anonuid=0)' \
-p 10.0.0.1:111:111/tcp \
-p 10.0.0.1:111:111/udp \
-p 10.0.0.1:2049:2049/tcp \
-p 10.0.0.1:2049:2049/udp \
-p 10.0.0.1:32765:32765/tcp \
-p 10.0.0.1:32765:32765/udp \
-p 10.0.0.1:32767:32767/tcp \
-p 10.0.0.1:32767:32767/udp \
--privileged \
-e NFS_LOG_LEVEL=DEBUG \
erichough/nfs-server

and get these outputs:

==================================================================
      SETTING UP ...
==================================================================
----> log level set to DEBUG
----> will use 24 rpc.nfsd server thread(s) (1 thread per CPU)
----> building /etc/exports from environment variables
----> collected 4 valid export(s) from NFS_EXPORT_* environment variables
----> kernel module nfs is loaded
----> kernel module nfsd is loaded
----> setup complete

==================================================================
      STARTING SERVICES ...
==================================================================
----> mounting rpc_pipefs filesystem onto /var/lib/nfs/rpc_pipefs
mount: mount('rpc_pipefs','/var/lib/nfs/rpc_pipefs','rpc_pipefs',0x00008000,'(null)'):0
----> mounting nfsd filesystem onto /proc/fs/nfsd
mount: mount('nfsd','/proc/fs/nfsd','nfsd',0x00008000,'(null)'):0
----> starting rpcbind
----> starting exportfs
exportfs: /etc/exports [1]: Neither 'subtree_check' or 'no_subtree_check' specified for export "10.0.0.0/8:/dir1".
  Assuming default behaviour ('no_subtree_check').
  NOTE: this default has changed since nfs-utils version 1.0.x

exportfs: /etc/exports [2]: Neither 'subtree_check' or 'no_subtree_check' specified for export "10.0.0.0/8:/dir2".
  Assuming default behaviour ('no_subtree_check').
  NOTE: this default has changed since nfs-utils version 1.0.x

exportfs: /etc/exports [3]: Neither 'subtree_check' or 'no_subtree_check' specified for export "10.0.0.0/8:/dir3".
  Assuming default behaviour ('no_subtree_check').
  NOTE: this default has changed since nfs-utils version 1.0.x

exportfs: /etc/exports [4]: Neither 'subtree_check' or 'no_subtree_check' specified for export "10.0.0.0/8:/dir4".
  Assuming default behaviour ('no_subtree_check').
  NOTE: this default has changed since nfs-utils version 1.0.x

exporting 10.0.0.0/8:/dir1
exporting 10.0.0.0/8:/dir2
exporting 10.0.0.0/8:/dir3
exporting 10.0.0.0/8:/dir4
----> starting rpc.mountd on port 32767
----> starting rpc.statd on port 32765 (outgoing from port 32766)
----> starting rpc.nfsd on port 2049 with 24 server thread(s)
rpc.nfsd: knfsd is currently down
rpc.nfsd: Writing version string to kernel: -2 +3 +4 +4.1 +4.2
rpc.nfsd: Created AF_INET TCP socket.
rpc.nfsd: Created AF_INET UDP socket.
rpc.nfsd: Created AF_INET6 TCP socket.
rpc.nfsd: Created AF_INET6 UDP socket.
----> all services started normally

==================================================================
      SERVER STARTUP COMPLETE
==================================================================
----> list of enabled NFS protocol versions: 4.2, 4.1, 4, 3
----> list of container exports:
---->   /dir1	10.0.0.0/8(ro,async,wdelay,hide,nocrossmnt,secure,root_squash,all_squash,no_subtree_check,secure_locks,acl,no_pnfs,anonuid=0,anongid=65534,sec=sys,ro,secure,root_squash,all_squash)
---->   /dir2	10.0.0.0/8(rw,async,wdelay,hide,nocrossmnt,secure,root_squash,all_squash,no_subtree_check,secure_locks,acl,no_pnfs,anonuid=0,anongid=65534,sec=sys,rw,secure,root_squash,all_squash)
---->   /dir3	10.0.0.0/8(rw,async,wdelay,hide,nocrossmnt,secure,root_squash,all_squash,no_subtree_check,secure_locks,acl,no_pnfs,anonuid=0,anongid=65534,sec=sys,rw,secure,root_squash,all_squash)
---->   /dir4	10.0.0.0/8(rw,async,wdelay,hide,nocrossmnt,secure,root_squash,all_squash,no_subtree_check,secure_locks,acl,no_pnfs,anonuid=0,anongid=65534,sec=sys,rw,secure,root_squash,all_squash)
----> list of container ports that should be exposed:
---->   111 (TCP and UDP)
---->   2049 (TCP and UDP)
---->   32765 (TCP and UDP)
---->   32767 (TCP and UDP)

==================================================================
      READY AND WAITING FOR NFS CLIENT CONNECTIONS
==================================================================
rpc.statd: Version 2.3.4 starting
rpc.statd: Flags: No-Daemon Log-STDERR TI-RPC 
rpc.statd: Failed to read /var/lib/nfs/state: Address in use
rpc.statd: Initializing NSM state
rpc.statd: Local NSM state number: 3
rpc.statd: Running as root.  chown /var/lib/nfs to choose different user
rpc.statd: Waiting for client connections

The nfs v4 is not working while nfs v3 can be used to mount. I tried to check the exported directories by showmount -e 10.0.0.1 but get anything output for long time.

I have checked the network between server and client, the server's ip is 10.0.0.1.