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Entry  Tue Oct 17 23:07:52 2017, gautam, Update, CDS, FEs unresponsive 
    Reply  Wed Oct 18 01:41:32 2017, jamie, Update, CDS, FEs unresponsive 
       Reply  Wed Oct 18 02:09:32 2017, gautam, Update, CDS, FEs unresponsive 
          Reply  Wed Oct 18 09:21:22 2017, jamie, Update, CDS, FEs unresponsive 
             Reply  Wed Oct 18 23:11:53 2017, gautam, Update, CDS, FEs unresponsive 
Message ID: 13385     Entry time: Tue Oct 17 23:07:52 2017     Reply to this: 13386
Author: gautam 
Type: Update 
Category: CDS 
Subject: FEs unresponsive 

While working on the IFO tonight, I noticed that the blinky status lights on c1iscex and c1iscey were frozen (but those on the other 3 FEs seemed fine). But all other lights on the CDS overview screen were green I couldn't access testpoints from these machines, and the EPICS readbacks for models on these FEs (e.g. Oplev servo inputs outputs etc) were frozen at some fixed value. This lasted for a good 5 minutes at least. But the blinky lights started blinking again without me doing anything. Not sure what to make of this. I am also not sure how to diagnose this problem, as trending the slow EPICS records of the CPU execution cycle time (for example) doesn't show any irregularity.

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