Earlier today or yesterday, Sheila added some new "shuttered" states to the ALS guardians.  The ISC_LOCK guardian requests these states during the "bounce violin mode damping" state.  The new ALS states are just empty, so that we can have a final nominal state, so we know when we've completed everything.  This prevents the ALS guardians from reporting things like "lockloss" or "fault" when the green lasers are shuttered.  The new states only have a guardian edge coming from the "IR found" state. 

However, in the ISC_LOCK we were requesting these states, and then immediately closing the green shutters. If the ALS guardians detect that there is no green light in the arms before they've been told to go to this new state, they'll end up in "lockloss" or "fault".  I don't totally understand why, but if they are then told to go to the "shuttered" state from somewhere other than "IR found" , this causes a lockloss of the full IFO. 

Anyhow, for now I've put a 2 second sleep between the node requests and the closing of the green shutters.  At least one time we have now successfully made it through this state after my fix.  I will consult with Sheila and Jamie tomorrow about the best way to handle this - should we build in more explicit ways for the guardian to get to the "shuttered" state?

As a side note, we had several locklosses earlier in the day at this state, and I was unable to find any obvious reason for the lockloss.  Since these new states were already in use, I suspect that this problem is what caused those locklosses.