[Fast-Reboot] Fix: Traceback bug after performing fast-reboot #2
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Signed-off-by: tshalvi [email protected]
Fixes #3294192
Why I did it
There is a queue in sysmonitor.py that is created based on an object of multiprocessing.Manager.
After performing fast-reboot, system health monitor is being shut down, what causes this Manager to be shut down as well, since it is a child-process of healthd.
That's why I moved the creation of this Manager from the top of the file to the function Sysmonitor.system_service() (The only place it is used), to make Manager a child-process of Sysmonitor, instead of Healthd. This way both the queue (the Manager) and the processes that uses this queue will be child-processes of the same process, and the problematic scenario of sysmonitor sending messages to a dead queue will not be possible.
How I did it
Removed the definition of manager as global and moved it to system_service() function
How to verify it
Perform a fast reboot and verify the traceback issue is fixed
Which release branch to backport (provide reason below if selected)
Description for the changelog
Ensure to add label/tag for the feature raised. example - PR#2174 under sonic-utilities repo. where, Generic Config and Update feature has been labelled as GCU.
Link to config_db schema for YANG module changes
A picture of a cute animal (not mandatory but encouraged)