sample_client can't connect uaserverhp over 10 mins.

Questions regarding the use of the High Perfomance SDK for Server development

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Joined: 14 May 2018, 10:27

sample_client can't connect uaserverhp over 10 mins.

Post by RichLiao »


I used sample_client connect uaserverhp, it worked, but it would disconnect after 6-8 mins

The error messages on server like this:

Code: Select all

E|20:17:42.069864|25803|  uatcpmsg_close_channel: ERROR channel 36553176 not found
E|20:17:42.070028|25803|  uasession_uatcpmsg_close_channel_complete: channel 922849536 close failed with -22
E|20:17:42.896736|25803|    uasession_dispatch_message: could not find channel 922849536
E|20:17:42.896899|25803|  **** uatcpmsg_uasession_dispatch_message_complete: message dispatching failed with -22
E|20:17:42.897038|25803| **** uatcpmsg_peer_recv_complete: Receive failed with -17, Message 0x22d85b0
I think this problem is from sample_client, because other client connect uaserverhp worked fine.

And the other problem is reconnect of subscription.
While the above error is occurred, sample_client tried to reconnect subscriptions (if it has subscriptions before disconnect).
The state of finite state machine is 2->13->10->11->5->2 (created->disconnect->wait for publish->republishing->wait for recreate item->created)
I think it maybe lack a state 4, recreate item, between 5 and 2.

Best regards

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Support Team
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Re: sample_client can't connect uaserverhp over 10 mins.

Post by Support Team »


the Client side of the SDK is still Beta state as mentioned in the CHANGELOG.TXT:
"The client side is still considered beta and not recommended for production use "

So errors must be expected. We provide this code only to allow our customers to start their development early.
The interfaces are stable.

There are known issues about the reconnect scenario which we are working on.

The FSM itself is quite complex. If you are interested in the details of the FSM
you can generate an FSM graph from the code:
1) enable HAVE_DOT_WRITER in src/util/fsm.h.
2) recompile the SDK
3) run client_demo (or any other client application)
This creates the file in the CWD
4) generate a PNG file using Graphviz dot tool
dot -Tpng > client_fsm.png
Best regards
Unified Automation Support Team

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