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Message ID: 202     Entry time: 23 Nov 2024, 00:48
Author: Jan Gruenert 
Group: PRC 
Subject: Issue 

Broken Bridges

Around 21h20 the XPD group notices that several karabo-to-DOOCS bridges are broken.
The immediate effect is that in DOOCS all XGMs in all beamlines show warnings
(because they don't receive important status informations from karabo anymore, for instance the insertion status of the graphite filters nrequired at this photon energy).

PRC contacts Tim Wilksen / DESY to repair these bridges after PRC check with DOC, who confirmed that on karabo side there were no issues.
Tim finds that ALL bridges are broken down. The root cause is a failing computer that hosts all these bridges, see his logbook entry;
https://ttfinfo.desy.de/XFELelog/show.jsp?dir=/2024/47/22.11_a&pos=2024-11-22T21:47:00
That also explains that HIREX data was no longer available in DOOCS for the accelerator team tuning SA2-HXRSS.

The issue was resolved by Tim and his colleagues at 21h56 and had persisted since 20h27 when that computer crashed (thus 1.5h downtime of the bridges).
Tim will organize with BKR to put a status indicator for this important computer hosting all bridges on a BKR diagnostic panel.

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