Installation guide

142 Chapter 8:Cluster Administration
Problem Symptom Solution
Cluster service stop fails
because a file system
cannot be unmounted
Messages indicating the
operation failed appear on
the console or in the log file
Use the fuser and ps
commands to identify the
processes that are accessing
the file system. Use the
kill command to stop the
processes. Use the lsof -t
file_system command
to display the identification
numbers for the processes that
are accessing the specified file
system. If needed, Pipe the
output to the kill command.
To avoid this problem, be
sure that only cluster-related
processes can access shared
storage data. In addition,
modify the service and enable
forced unmount for the file
system. This enables the cluster
service to unmount a file system
even if it is being accessed by
an application or user.
Incorrect entry in the cluster
database
Cluster operation is
impaired
The cluadmin utility can be used
to examine and modify service
configuration. Additionally, the
cluconfig utility is used to modify
cluster parameters.
Incorrect Ethernet heartbeat
entry in the cluster database
or /etc/hosts file
Cluster status indicates
that a Ethernet heartbeat
channel is
OFFLINE even
though the interface is valid
Examine and modify the cluster
configuration by running the
cluconfig utility, as specified
in Section 8.4, Modifying the
Cluster Configuration, and
correct the problem.
In addition, be sure to use
the ping command to send
a packet to all the network
interfaces used in the cluster.