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  5. QuickOPC-UA in .NET
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  9. BadRequestTimeout when calling DiscoverServer multiple times

BadRequestTimeout when calling DiscoverServer multiple times

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14 Jul 2017 15:47 - 14 Jul 2017 15:47 #5359 by support
Replied by support on topic BadRequestTimeout when calling DiscoverServer multiple times
When you issue multiple requests to the (discovery) server, it is possible that they then take longer to process, and cause the timeout.

You should rather make the DiscoverServers just once and then pass the outcome wherever it's needed.
Last edit: 14 Jul 2017 15:47 by support.

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14 Jul 2017 15:17 - 14 Jul 2017 15:18 #5358 by Captain_Dash
Replied by Captain_Dash on topic BadRequestTimeout when calling DiscoverServer multiple times
1. Yes, I call this on each class and then i do the mapping. The mappings are on different nodes.
I need the DiscoverUriString for the mapping.

2. I have multiple instances of the same class which are connecting in this case to the same server on a single computer.

The mapping will not be performed in this case, because the discoverServer went wrong before.
Last edit: 14 Jul 2017 15:18 by Captain_Dash.

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14 Jul 2017 15:10 #5357 by support
Replied by support on topic BadRequestTimeout when calling DiscoverServer multiple times
Can you please clarify this a bit.

1. Are you saying that on each class, you call DiscoverServers, and then do the mapping? Why do you need to call DiscoverServers?

2. Do multiple classes map to server(s) on a single computer?

Thank you

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14 Jul 2017 14:18 #5356 by Captain_Dash
BadRequestTimeout when calling DiscoverServer multiple times was created by Captain_Dash
Hello,

I have multiple instances of a class, which contains and EasyUAClient as member. I want to connect this instances to the server, create the mapping and modify values if needed. I want all instances to do this in parallel and got the problem when i am calling the DiscoverServers method i will receive a UAException

"An OPC-UA operation failure with error code -2138767360 (0x80850000) occurred, originating from ''. The inner OPC-UA service exception with service result 'BadRequestTimeout' contains details about the problem."


which contains a UAServiceException

"BadRequestTimeout
+ Discovery URL: "opc.tcp://serverName:4840/UADiscovery""


Why is this happening?

As a workaround i set a lock around the discoverServer methods call in this class. But if a new class will be added which needs to call this method, too, the problem will occur again.

Best regards

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  5. QuickOPC-UA in .NET
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  9. BadRequestTimeout when calling DiscoverServer multiple times
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