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Problem: RTC Crash

Manifestation:

  • Electronic mail with subject: ShaneAO: No heartbeat from dispatcher for Realtime i/f, disp no.1 with the following content:
     
       No heartbeat keyword has been received from the dispatcher for Realtime i/f, disp no.1, (keyword saocon.DISP1CLK) in 1.0 minutes 
        
       [Tracking information: this email: from dispatcher #2 is part of the actionlist for SAOCON1, and was triggered by an update to keyword: NE_SAOCON1 (Dcounter=7661161). dinfo = onchange/3/6] 
       
  • shaneao terminal window constantly spewing text.
  • If present at console, eventsounds emits audible warning.

Solution/Recovery:

  • In ShaneAO loop control GUI:
    • Select TT camera reset.
    and/or,
    • Select WFS camera reset.
If unsuccessful,
  • In ShaneAO Power Control GUI, cyle TTCam and WFSCam OFF and ON.
If unsuccessful,
  • In shaneao terminal window, stop and re-start the shaneao real-time code.
If unsuccessful,
  • ping real.ucolick.org — Verify communication status.
  • In shaneao terminal window, stop [exit()] the shaneao real-time code.
  • In ShaneAO Power Controls, power-cycle outlet real/rtc computer OFF for at least 60 seconds and ON.
  • ping real.ucolick.org — Verify communication status.
  • Re-start the the shaneao real-time code.

Cause(s):

  • Real-time code out of synchronization with either Tip-Tilt (TT) camera or Wave-Front Sensor (WFS) camera.
  • Crash of real.ucolick.org.
  • Associated Issues:

    Change Log:

    2019-06-04: Updated.
    2019-04-08: Updated.
    2017-03-10: First version.

This document last updated (UTC): Tuesday 04 March 2025