3.14 - When will this log occur?

jinwonds · Post by **jinwonds** » Mon Jan 03, 2022 1:23 am

Hello,
I got below message from my project.

WCCILpmon (1), 2021.12.19 08:41:13.835, SYS, WARNING, 36/pmon, Blocking Manager WCCOAeesSnd(1) detected. No heartbeat since 30 seconds.

I knew heartbeat stop log will occured when task is in hang or load.
So, I checked the load when this issue was occured.
But there is no load and I can't find any problems.

I wonder when the heartbeat stop log occurs.

Please let me know if you have any question or concerns.

Thank you.
Best Regards,

leoknipp · Post by **leoknipp** » Mon Jan 03, 2022 9:25 am

The log message "Blocking manager" is written by the process monitor if the heartbeat counter in the shared memory of the WCCILpmon was not updated within the given timeout.

The manager WCCOAeesSnd is not part of the WinCC OA installation. It is a customer specific process.
If you want to get more detailed information why the manager was blocking you have to get in contact with the vendor/developer for this manager.

Best Regards
Leopold Knipp
Senior Support Specialist

gschijndel · Post by **gschijndel** » Mon Jan 03, 2022 10:34 am

In case the development is in your control you should check if the 'Manager::dispatch' function is called inside your loop.

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