iManager hangs, crashes, stalls
iManager broken, corrupt
iManager plugin update fails
Copy the iManager files from any good, known working server at a similar patch level.
e.g. From the console of the bad server:
rsync -avz --progress --verbose --human-readable root@<good_server>:/var/opt/novell/iManager/* /var/opt/novell/iManager/
Restart tomcat or reboot the server
Reinstall any additional plugins as necessary
However, it is recognised that there are legitimate situations, where the cause of a failure is known (such as a power outage leading to file corruption) and when the system just needs to be up and running as quickly as possible. In such cases, the above technique can be used with caution. The root cause of the problem needs to be understood as soon as convenient in order to prevent it happening again.
If there is no working server readily available, it may be quicker to build one from scratch and use it as a source to copy the files from. Alternatively, a file system backup could be used.