We have a few processes and programs grouped into a common Monit group. We stopped and started this group, all the program checks stuck into "initializing" state for almost an hour. It looks like monit freeze as cluster status comes up on quitting and starting monit again.
Note: With very verbose logging, we see several errors like this in the logs:
[PDT Oct 31 11:52:55] debug : Cannot open proc file /proc/18422/stat -- No such file or directory [PDT Oct 31 11:52:55] debug : freez -- cannot read /proc/18422/stat [PDT Oct 31 11:55:33] debug : Cannot open proc file /proc/19030/stat -- No such file or directory [PDT Oct 31 11:55:33] debug : system statistic error -- cannot read /proc/19030/stat