Dear Maintainer, we have the same general situation (upgrade from Debian 10 to 11 wiht a remote Java application that stops running but runs perfectly on a virtualized Debian 10) but with a different error:
org.xml.sax.SAXException: SAX2 driver class org.apache.xerces.parsers.SAXParser not found
java.lang.ClassNotFoundException: org.apache.xerces.parsers.SAXParser
at org.xml.sax.helpers.XMLReaderFactory.loadClass(XMLReaderFactory.java:230)
at org.xml.sax.helpers.XMLReaderFactory.createXMLReader(XMLReaderFactory.java:191)
at finanze.IDAC.gui.MainWin.startApp(MainWin.java:445)
at finanze.IDAC.guiIVP.MainWinIVP18.main(MainWinIVP18.java:46)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at net.sourceforge.jnlp.Launcher.launchApplication(Launcher.java:576)
at net.sourceforge.jnlp.Launcher$TgThread.run(Launcher.java:945)
Caused by: java.lang.ClassNotFoundException: org.apache.xerces.parsers.SAXParser
at net.sourceforge.jnlp.runtime.JNLPClassLoader.loadClass(JNLPClassLoader.java:1644)
at org.xml.sax.helpers.NewInstance.newInstance(NewInstance.java:82)
at org.xml.sax.helpers.XMLReaderFactory.loadClass(XMLReaderFactory.java:228)
... 9 more
Regards!
Guido