We have a CallManager running 4.1.3(sr3a). About 1-2 times a week the CallManager Service restarts. At first I thought this was occurring at the same time as backups, but I have since discovered that is not the case.
We have noticed this for more than one customer running different versions of CallManager. It is usually occurs after hours, and most of the time it is not occuring at the same time as backups.
The last time this occurred there were a lot of transient connections events in the app log, and then the last entry before restaring in the event log is SDL error for connectivity to the sub. (also this appears to happen on the pubs).
Are you getting this error “Installer User Interface Mode Not Supported. The installer cannot run in this UI mode. To specify the interface mode, use the -i command-line option, followed by the UI mode identifier. The value UI mode identifiers...
The below trick might come handy when you have to add a new node to a cluster but you don't have or is unsure of the security password for the publisher. This procedure has been around for ages.
1) Login into the CLI of the Publisher.