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Deadlock involving UAClientEngineBase.Reconnector

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27 Mar 2024 16:03 #12695 by sd
I'll try to test a more recent version.

As for the upgrade, these are the dependencies:
QuickOPC => OPCFoundation => Micrsoft.AspNetCore.Server.Kestrel => MS DI abstraction => Lamar 7.0

We use Lamar for DI, which is apparently picked up by MS DI abstraction. It demands Lamar >7.0, which no longer supports .Net framework. And upgrading to recent .Net has some other depedency issues.

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26 Mar 2024 18:39 #12687 by support
Hello, and thank you.

The build number would be necessary if this was a fairly new version. But your version is 6 years old(kb.opclabs.com/Versions ). There could have been a bug, this area has certainly undergone changes, as I wrote.

My recommendation is to retest with newest version, and if tests are successful, upgrade.

I am not aware of a scenario where it would be essentially impossible to use the newer version. I would welcome if you can explain that.

Regards

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26 Mar 2024 15:22 #12686 by sd
The DLL version is 5.54.1026.1. I hope that includes the build number you need.

This is an older version, but upgrading was terrible because of a whole lot of (for us incompatible) new dependencies such as Micrsoft.AspNetCore.Server.Kestrel.

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26 Mar 2024 14:41 #12685 by support
Hello.

This area has undergone some changes, multiple times. I need to know the full QuickOPC version, including build number, in order to be able to respond.

Best regards

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26 Mar 2024 13:18 #12684 by sd
I have one particular customer where our OPC UA client consistenly runs into a deadlock. I've disabled all our calls to the OPC library, apart from setting up a connection. I've repeated the deadlock 6 times, and every time the UAClientEngineBase.Reconnector is involved. This is some mechanism of the library that automatically and periodically runs in the background (like every 5s).

I can provide more details such as thread stack traces if desired.

Is this is a known issue in some way?

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