[201911][dockers][supervisor] Increase event buffer size for process exit listener; Set all event buffer sizes to 1024 #7106
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…exit listener Backpor of #7083 to the 201911 branch
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lguohan
approved these changes
Mar 28, 2021
qiluo-msft
approved these changes
Mar 28, 2021
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Backport of #7083 to the 201911 branch.
Why I did it
To prevent error messages like the following from being logged:
This is basically an addendum to #5247, which increased the event buffer size for dependent-startup. While supervisor-proc-exit-listener doesn't subscribe to as many events as dependent-startup, there is still a chance some containers (like swss, as in the example above) have enough processes running to cause an overflow of the default buffer size of 10.
This is especially important for preventing erroneous log_analyzer failures in the sonic-mgmt repo regression tests, which have started occasionally causing PR check builds to fail. Example here.
I set all supervisor-proc-exit-listener event buffer sizes to 1024, and also updated all dependent-startup event buffer sizes to 1024, as well, to keep things simple, unified, and allow headroom so that we will not need to adjust these values frequently, if at all.