Moved Smart Client to new server Data Broadcast Fails

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Moved Smart Client to new server Data Broadcast Fails

Postby qhill » Mon Nov 06, 2023 11:42 pm

I moved my smart client installation (2019.3.0 -releaseNumber 3412) to a new server and data broadcasting is failing and I'm getting some errors in the logs.

2023-11-06 12:06:29,643 ERROR [pool-4-thread-66] ClientManager - Error flushing message buffer to client 326BD240-A151-4F80-87E7-312697B9F56B [ ]
java.rmi.RemoteException: Method is not Remote: interface com.servoy.j2db.dataprocessing.IClient::public abstract boolean com.servoy.j2db.dataprocessing.IClient.isAlive() throws java.rmi.RemoteException
at java.rmi.server.RemoteObjectInvocationHandler.invokeRemoteMethod(Unknown Source) ~[?:1.8.0_341]
at java.rmi.server.RemoteObjectInvocationHandler.invoke(Unknown Source) ~[?:1.8.0_341]
at com.sun.proxy.$Proxy43.isAlive(Unknown Source) ~[?:?]
at com.servoy.j2db.server.dataprocessing.ClientProxy.Zc(ClientProxy.java:90) ~[j2dbdev.jar:2019.3.0.3412]
at com.servoy.j2db.server.dataprocessing.Zq.run(Zq.java:11) [j2dbdev.jar:2019.3.0.3412]
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) [?:1.8.0_341]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) [?:1.8.0_341]
at java.lang.Thread.run(Unknown Source) [?:1.8.0_341]
2023-11-06 12:06:29,643 WARN [pool-4-thread-66] ClientManager - Unregistering client after queueing timeout: 326BD240-A151-4F80-87E7-312697B9F56B [ ]

The users are also getting the message:
Reconnect failed
Old transaction,old locks or in-memory data sources found, need to restart the solution

I did restart the solution and the issues are still happening. Any ideas?
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Re: Moved Smart Client to new server Data Broadcast Fails

Postby qhill » Tue Nov 07, 2023 11:30 pm

This was a java issue. We had been using Java 8 91 and the upgraded server had Java 8 341. We downgraded to Java 8 181 and that fixed the issue.
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Re: Moved Smart Client to new server Data Broadcast Fails

Postby Providence1 » Fri Feb 23, 2024 7:55 pm

Good advice!

So, what's the latest version of java JRE that works both on a Windows 2019 server and a Mac and PC (smart) client that we can safely run. Surely it must be later than .181 ?
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Re: Moved Smart Client to new server Data Broadcast Fails

Postby robert.edelmann » Mon Feb 26, 2024 3:36 am

I'd either stick with the version that's shipped with the Servoy developer that you are using or you use the most recent lts version from https://adoptium.net/.

If you need JavaFX for the smart client you could look into https://openjfx.io/openjfx-docs/#install-javafx or use a lts version from https://www.azul.com/downloads/#zulu.

We successfully used adoptopenkd / adptium on server and Azul on client when we were using smart clients.
mit freundlichen Grüßen
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