Experimental Physics and
Industrial Control System

Andrew Johnson via Core-talk <core-talk at aps.anl.gov> · Tue, 19 May 2020 16:46:28 -0000

Public bug reported:

Most recently, Carsten Winkler reported in https://epics.anl.gov/tech-
talk/2020/msg00946.php

    For a project I need to load and unload the Channel Access context in a
    shared library. Loading is no problem but unloading. It always fails
    during ca_context_destroy() function.

This problem has been reported and discussed previously, see
https://epics.anl.gov/tech-talk/2017/msg00371.php and
https://epics.anl.gov/tech-talk/2004/msg00743.php thus it is a known
issue which would probably require significant work to fix.

This bug report is a place-holder for any work towards making it
possible to completely shut down all libCom background threads and
releasing the resources allocated by those subsystems.

** Affects: epics-base
     Importance: Wishlist
         Status: Confirmed

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https://bugs.launchpad.net/bugs/1879532

Title:
  Can't completely shutdown libCa and libCom

Status in EPICS Base:
  Confirmed

Bug description:
  Most recently, Carsten Winkler reported in https://epics.anl.gov/tech-
  talk/2020/msg00946.php

      For a project I need to load and unload the Channel Access context in a
      shared library. Loading is no problem but unloading. It always fails
      during ca_context_destroy() function.

  This problem has been reported and discussed previously, see
  https://epics.anl.gov/tech-talk/2017/msg00371.php and
  https://epics.anl.gov/tech-talk/2004/msg00743.php thus it is a known
  issue which would probably require significant work to fix.

  This bug report is a place-holder for any work towards making it
  possible to completely shut down all libCom background threads and
  releasing the resources allocated by those subsystems.

To manage notifications about this bug go to:
https://bugs.launchpad.net/epics-base/+bug/1879532/+subscriptions

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System