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Unobserved Task Exception when Using EasyUAClient
07 Feb 2023 10:18 #11513
by support
Replied by support on topic Unobserved Task Exception when Using EasyUAClient
Hello,
thank you for update.
Regarding the other exception, I was not aware of it, and with high probability, it is something that comes from the OPC Foundation stack layer, and was probably fixed in there, and I took over the fix by updating to a newer version of the stack.
Best regards
thank you for update.
Regarding the other exception, I was not aware of it, and with high probability, it is something that comes from the OPC Foundation stack layer, and was probably fixed in there, and I took over the fix by updating to a newer version of the stack.
Best regards
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06 Feb 2023 22:27 #11511
by gkalipershad
Replied by gkalipershad on topic Unobserved Task Exception when Using EasyUAClient
To close the loop on this - the user upgraded to latest build and confirmed this resolved the issue. My own testing confirmed the same. Thank you for the quick turnaround on this!
Furthermore, another customer approached me because they were receiving the following exception every time they introduced an EasyUAClient object:
+ InnerException {"Unable to cast object of type 'System.Net.Mail.SmtpClient' to type 'System.Net.HttpWebRequest'."} System.Exception {System.InvalidCastException}
Upgrading to the latest build resolved this issue as well. He was previously on 5.59.1034.1, so it is possible that another change in the toolkit addressed the problem, but I wanted to document here in case someone else ran into something similar.
Furthermore, another customer approached me because they were receiving the following exception every time they introduced an EasyUAClient object:
+ InnerException {"Unable to cast object of type 'System.Net.Mail.SmtpClient' to type 'System.Net.HttpWebRequest'."} System.Exception {System.InvalidCastException}
Upgrading to the latest build resolved this issue as well. He was previously on 5.59.1034.1, so it is possible that another change in the toolkit addressed the problem, but I wanted to document here in case someone else ran into something similar.
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01 Feb 2023 19:51 #11506
by gkalipershad
Replied by gkalipershad on topic Unobserved Task Exception when Using EasyUAClient
Got it - thanks!
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01 Feb 2023 19:49 #11505
by support
Replied by support on topic Unobserved Task Exception when Using EasyUAClient
Hello,
this is now fixed in 5.70.1053.1.
I will send you an email with download info.
Best regards
this is now fixed in 5.70.1053.1.
I will send you an email with download info.
Best regards
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30 Jan 2023 18:46 #11498
by gkalipershad
Replied by gkalipershad on topic Unobserved Task Exception when Using EasyUAClient
Yes, the user has requested a fix for V5.70.
Thanks,
GK
Thanks,
GK
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28 Jan 2023 16:49 #11494
by support
Replied by support on topic Unobserved Task Exception when Using EasyUAClient
(Regarding the attachment: It is somewhat unexpected that in order for the attachment to appear in the post, one must first "add" it (select the file), and then "insert" it into the message. I myself got caught multiple times by forgetting to insert it. So that's the most likely reason. Size is also limited, but I have raised the limit quite high, and there is an error message when it is exceeded).
Thank you for the project. I was able to reproduce the error, and I can confirm it is a problem in version 5.70. And, it has already been fixed in the upcoming version 5.71, but that is not going to be released any time soon.
The error comes from an internal "warm-up" processing that is being done in order to force .NET to compile parts of toolkit code as soon as possible, so that the subsequent operations are executed faster. The warm-up code attempts a connection to an invalid address, which causes the exception. It is wrong that it happens, but it is essentially harmless.
With this explanation, is it required to provide a fix into version 5.70?
Best regards
Thank you for the project. I was able to reproduce the error, and I can confirm it is a problem in version 5.70. And, it has already been fixed in the upcoming version 5.71, but that is not going to be released any time soon.
The error comes from an internal "warm-up" processing that is being done in order to force .NET to compile parts of toolkit code as soon as possible, so that the subsequent operations are executed faster. The warm-up code attempts a connection to an invalid address, which causes the exception. It is wrong that it happens, but it is essentially harmless.
With this explanation, is it required to provide a fix into version 5.70?
Best regards
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26 Jan 2023 20:25 #11468
by gkalipershad
Replied by gkalipershad on topic Unobserved Task Exception when Using EasyUAClient
Perhaps the attachment didn't stick due to its size? Here is a download link instead: softwaretoolbox.sharefile.com/d-seab1364eae9c486bb388fc4a7c3a4cee
The error still occurs, but the application never crashes due to how the exception is being handled. I think we are trying to figure out where the exception comes from in the first place because it is only present one an EasyUAClient object is introduced.
Regards,
GK
The error still occurs, but the application never crashes due to how the exception is being handled. I think we are trying to figure out where the exception comes from in the first place because it is only present one an EasyUAClient object is introduced.
Regards,
GK
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26 Jan 2023 18:38 #11464
by support
Replied by support on topic Unobserved Task Exception when Using EasyUAClient
Hello.
You forgot to "insert" the attachment.
But I probably know know where this might be coming from. Can you answer one question:
When the application is run *outside* the Visual Studio & debugger, does this exception crash the application?
Or is it just something that happens inside the debugger?
Regards
You forgot to "insert" the attachment.
But I probably know know where this might be coming from. Can you answer one question:
When the application is run *outside* the Visual Studio & debugger, does this exception crash the application?
Or is it just something that happens inside the debugger?
Regards
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25 Jan 2023 17:30 #11462
by gkalipershad
Unobserved Task Exception when Using EasyUAClient was created by gkalipershad
QuickOPC 5.70.1012
.NET 6.0
VS2022
Windows 10.0.22621
The user set up a sample application that sets some shared static properties when the application starts, while also kicking off a task to do some other things. Once the GC kicks in, we see an Unobserved Task Exception occur around DNS. This only happens when there is an EasyUAClient object instantiated.
The following error is generated: Unobserved Task Exception: IPv4 address 0.0.0.0 and IPv6 address ::0 are unspecified addresses that cannot be used as a target address. (Parameter 'hostname')
I have attached a sample Console application that highlights the problem. Please let us know if the error stems from something we are doing incorrectly, or if there is something happening under the hood with the EasyUAClient Object.
.NET 6.0
VS2022
Windows 10.0.22621
The user set up a sample application that sets some shared static properties when the application starts, while also kicking off a task to do some other things. Once the GC kicks in, we see an Unobserved Task Exception occur around DNS. This only happens when there is an EasyUAClient object instantiated.
The following error is generated: Unobserved Task Exception: IPv4 address 0.0.0.0 and IPv6 address ::0 are unspecified addresses that cannot be used as a target address. (Parameter 'hostname')
I have attached a sample Console application that highlights the problem. Please let us know if the error stems from something we are doing incorrectly, or if there is something happening under the hood with the EasyUAClient Object.
Attachments:
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