jilavsky
commented
2 years ago restart BS has helped for now
Closed jilavsky closed 2 years ago
jilavsky
commented
2 years ago restart BS has helped for now
prjemian
commented
2 years ago That's the best first step. It assumes this is a one-time connection timeout issue.
prjemian
commented
2 years ago I'll look into which PyEpics version (expecting 3.5.0) and also add diagnostic to inform which version of libca is in use.
prjemian
commented
2 years ago We still do not know the root cause why connection timeouts continue to be a problem. For certain it is an unidentified situation that happens here randomly.
prjemian
commented
2 years ago In [7]: epics.__version__
Out[7]: '3.5.0'In [10]: epics.ca.find_libca()
Out[10]: '/share1/bluesky/conda_envs/bluesky_2022_1/epics/lib/linux-x86_64/libca.so'
In [16]: epics.ca.version()
Out[16]: '4.13'Per https://github.com/APS-USAXS/ipython-usaxs/issues/546#issuecomment-1042407960, hard-code the PYEPICS_LIBCA environment variable in the startup shell script.
prjemian
commented
2 years ago The version of libca referenced above was installed from the epics-base package:
(/share1/bluesky/conda_envs/bluesky_2022_1) bash-4.2$ conda list epics
# packages in environment at /share1/bluesky/conda_envs/bluesky_2022_1:
#
# Name Version Build Channel
epics-base 7.0.5.0 h295b1ef_0 conda-forge
pyepics 3.5.0 py39hf3d152e_1 conda-forgePyEpics also provides its own libca, installed locally here:
/share1/bluesky/conda_envs/bluesky_2022_1/lib/python3.9/site-packages/epics/clibs/linux64/libca.soStill version 4.13:
(/share1/bluesky/conda_envs/bluesky_2022_1) bash-4.2$ export PYEPICS_LIBCA=/share1/bluesky/conda_envs/bluesky_2022_1/lib/python3.9/site-packages/epics/clibs/linux64/libca.so
(/share1/bluesky/conda_envs/bluesky_2022_1) bash-4.2$ ipython
Python 3.9.7 (default, Sep 16 2021, 13:09:58)
Type 'copyright', 'credits' or 'license' for more information
IPython 7.29.0 -- An enhanced Interactive Python. Type '?' for help.
In [1]: import ophyd
In [2]: sr = ophyd.EpicsSignalRO("S:SRcurrentAI", name="sr")
In [3]: sr.get()
Out[3]: 102.131801510282
In [5]: import epics
In [6]: epics.ca.version()
Out[6]: '4.13'
In [7]: epics.ca.find_libca()
Out[7]: '/share1/bluesky/conda_envs/bluesky_2022_1/lib/python3.9/site-packages/epics/clibs/linux64/libca.so'
In [8]: Interesting. Same 4.13 version with older EPICS base libca:
In [6]: epics.ca.version()
Out[6]: '4.13'
In [7]: epics.ca.find_libca()
Out[7]: '/APSshare/epics/base-3.15.6/lib/linux-x86_64/libca.so'Another:
In [5]: epics.ca.version()
Out[5]: '4.13'
In [6]: epics.ca.find_libca()
Out[6]: '/APSshare/epics/base-7.0.4.1/lib/linux-x86_64/libca.so'Note:
In [7]: epics.ca.version??
Signature: epics.ca.version()
Source:
@withCA
def version():
""" Print Channel Access version string.
Currently, this should report '4.13' """
return bytes2str(libca.ca_version())So do not expect epics.ca.version() to be a useful diagnostic.
prjemian
commented
2 years ago nothing more to do here
Started BS testing again, cannot even do preUSAXStune: