Cyrus backend crashing (Solaris)

[Gary Mills]

On Mon, Jul 19, 2010 at 05:04:18PM +0100, David Mayo wrote:
> 
> When trying to diagnose the issue, on any attempt to run ps, prstat or 
> to HUP the syslogd process (to set the log level for imapd to "debug") 
> the command hangs and cannot be exited with Ctrl+C. Similarly, attempts 
> to kill the master process or shut down the system (even bypassing the 
> shutdown scripts by using "reboot") do not have any effect other than 
> hanging the shell in which the commands were issued. New shells can be 
> opened and certain commands run, but we aren't much closer to knowing 
> precisely what is wrong. The only way to bring the system back is to 
> reset it via the on board console.

This happened to me about a year ago with Cyrus on a Solaris 10
server.  The cause was a deadlock in one of the kernel ZFS modules.
The problem is fixed in the current Solaris patches.

-- 
-Gary Mills-        -Unix Group-        -Computer and Network Services-