The clean entry point of Mount agent executes the umount command to un-mount the file
system of type nfs. When the NFS mount point hangs without any response, umount command fails
to un-mount the nfs file system and thus causes clean entry point to timeout. In addition to
this the clean entry point of Mount agent also executes the df command to see if the file
system is mounted before un-mounting it. The df command also hangs for nfs mount points
on NFS client when the NFS service on NFS server is down.
2011/10/27 12:50:29 VCS ERROR V-16-10001-5586 (node01) Mount:mnt_appl01:monitor:Mount point /dcs/appl01 is busy with some other block device.
2011/10/27 12:52:25 VCS NOTICE V-16-1-10301 Initiating Online of Resource mnt_appl01 (Owner: Unspecified, Group: appl01) on System node01
2011/10/27 12:52:42 VCS WARNING V-16-10001-5501 (node01) Mount:mnt_appl01:online:MountPoint </dcs/appl01> does not exist. Resource <mnt_appl01> will not go online
2011/10/27 12:54:43 VCS ERROR V-16-2-13066 (node01) Agent is calling clean for resource(mnt_appl01) because the resource is not up even after online completed.
2011/10/27 12:54:44 VCS INFO V-16-2-13068 (node01) Resource(mnt_appl01) - clean completed successfully.
2011/10/27 12:54:44 VCS INFO V-16-2-13071 (node01) Resource(mnt_appl01): reached OnlineRetryLimit(0).
2011/10/27 12:54:44 VCS ERROR V-16-1-10303 Resource mnt_appl01 (Owner: Unspecified, Group: appl01) is FAULTED (timed out) on sys node01
2011/10/27 12:54:44 VCS INFO V-16-6-0 (node01) resfault:(resfault) Invoked with arg0=emffhdspa01, arg1=mnt_appl01, arg2=OFFLINE
2011/10/27 12:54:45 VCS INFO V-16-6-15002 (node01) hatrigger:hatrigger executed /opt/VRTSvcs/bin/triggers/resfault node01 mnt_appl01 OFFLINE successfully
2011/10/27 12:59:44 VCS ERROR V-16-10001-5586 (node01) Mount:mnt_appl01:monitor:Mount point /dcs/appl01 is busy with some other block device.
df command can hang for nfs mount points on NFS client when the NFS service on NFS server is down.
Symantec has modified the Mount agent to not use the df command when
file system of type nfs is configured with Mount resource.