[galaxy-dev] Timeout for job submission

Hello, In my configuration, I submit job through SGE. I have a cluster in the backend. If nodes are shutdown job is in state "queue wait" and I noticed that it disappear sometime. Is there a timeout somewhere in galaxy which is monitoring jobs ? In fact, I whish to use a script in SGE which is halting or booting nodes according to the SGE queue. -Regards Rem.