[Mongrel] properly restarting mongrel instances

Anthony E. lists at ruby-forum.com
Sun Nov 2 19:10:26 EST 2008

John Joseph Bachir wrote:
> Hi folks.
> Using mongrel_rails and the mongrel_cluster capistrano recipes, I
> often encounter a situation where some of the mongrel processes don't
> die in time to be restarted. The output of capistrano will tell me
> something like "mongrel on port 8001 is already up", but that's only
> because capistrano/mongrel_rails failed to take it down in the first
> place.
> The solution is to do a full deploy:stop a couple times to make sure
> they are all down, and then do a deploy:start.
> Is my problem typical? Is there a solution? Seems like mongrel_rails
> and/or the capistrano recipes should wait for the processes to stop
> before attempting to restart them.
> Thanks for any insight,
> John

Most of the responses assume that waiting for your mongrels to stop is 
better than sending them the signal and continuing on with starting a 
new batch of servers.

I don't see a problem with this, unless the old processes finished off 
any requests in the pipeline start picking up new requests...can anyone 
verify that a "stop" command to a mongrel cluster will keep the 
mongrel(s) that were sent the signal from serving new requests?

Assuming that is true, then it already would be a "rolling restart", 
from my understanding.
Posted via http://www.ruby-forum.com/.

More information about the Mongrel-users mailing list