aLIGO LHO Logbook

H1 CDS

sheila.dwyer@LIGO.ORG - posted 22:16, Wednesday 26 October 2016 - last comment - 09:19, Thursday 27 October 2016(30911)

lockloss tool was working, isn't anymore

We are havgin trouble using the lockloss tool, but it has been working since Jamie made a change on October 19th. Is this related to problems with NDS2? TJ and I used lockloss plot earlier in the day today without problems.

Here's what I get:

lockloss select
Segmentation fault (core dumped)

Manually finding a time to ask for:

lockloss -c channels_to_look_at_NOISE_TUNINGS.txt plot 1161580111

.......

INFO: plotting: Adding subplot with the following channels:
        H1:LSC-ASAIR_A_LF_OUT_DQ
2016-10-26 22:14:23,904 : NDSAxes : Initializing NDSAxes for the following channels:
        H1:LSC-SRCL_GAIN
INFO: plotting: Initializing NDSAxes for the following channels:
        H1:LSC-SRCL_GAIN
2016-10-26 22:14:23,938 : NDSBufferDict : Buffers requested at start time 1161580081 and end time 1161580110 for the following channels:
        H1:LSC-SRCL_GAIN
INFO: bufferdict: Buffers requested at start time 1161580081 and end time 1161580110 for the following channels:
        H1:LSC-SRCL_GAIN
terminate called after throwing an instance of 'NDS::connection::daq_error'
what(): Low level daq error occured [13]: Requested data were not found.
None of the selected channels returned data.
Aborted (core dumped)

Comments related to this report

jameson.rollins@LIGO.ORG - 22:34, Wednesday 26 October 2016 (30913)

Link

The lockloss tool now uses NDS to find the lockloss times. Since both the time determination and data plotting both use NDS and they're both failing, this is definitely an NDS issue. Talk to Jonathan and/or Jim.

james.batch@LIGO.ORG - 08:59, Thursday 27 October 2016 (30925)

Link

Would this be NDS1 or NDS2? Makes a big difference as to where to start debugging.  The NDS2 client was updated to nds2-client-0.13.0 on Tuesday, so if lockloss uses NDS2, that's probably where your issue is.  Please file an FRS.

jameson.rollins@LIGO.ORG - 09:19, Thursday 27 October 2016 (30926)

Link

NDS1 access with the nds2-client python bindings.