Origin of Bad_SequenceNumberUnknown log outputs

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gbecker
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Joined: 09 Feb 2022, 16:00

Origin of Bad_SequenceNumberUnknown log outputs

Post by gbecker »

Dear all,

working with the Java OPC UA SDK, I sometimes see log messages like the ones below while running an OPC UA client with monitored items pointing to another OPC UA server. I would like to understand more about why we are seeing these and whether we should do something about them.

[INFO ] 2022-07-21 15:32:03.230 [OPC-UA-Stack-Blocking-Work-Executor-5] Subscription - Acknowledge on Subscription 1: 154 - Bad_SequenceNumberUnknown
[INFO ] 2022-07-21 15:32:03.231 [OPC-UA-Stack-Blocking-Work-Executor-3] Subscription - Acknowledge on Subscription 1: 154 - Bad_SequenceNumberUnknown
[INFO ] 2022-07-21 15:32:03.231 [OPC-UA-Stack-Blocking-Work-Executor-3] Subscription - Acknowledge on Subscription 1: 155 - Bad_SequenceNumberUnknown

I would appreciate any assistance you might be able to give to identify the root cause.

Thanks, Gerald

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