The *only* correct location for that .jar is GUACAMOLE_HOME/lib/, which in your case is /guacamole/lib. You should remove that .jar from all those other locations.
As for the error you're seeing, that is due to the .jar being present in GUACAMOLE_HOME/extensions/. Guacamole tries to load it as an extension, but aborts because it isn't. - Mike On May 17, 2017 16:42, "Sam" <[email protected]> wrote: In my log file I always receive: May 17 16:33:38 web server: 16:33:38.198 [localhost-startStop-1] INFO o.a.g.extension.ExtensionModule - Extension "MySQL Authentication" loaded. May 17 16:33:38 web server: 16:33:38.198 [localhost-startStop-1] ERROR o.a.g.extension.ExtensionModule - *Extension "mysql-connector-java-5.1.42-bin.jar" could not be loaded*: Extension mysql-connector-java-5.1.42-bin.jar is missing guac-manifest.json May 17 16:33:38 web server: 16:33:38.424 [localhost-startStop-1] INFO o.a.g.t.w.WebSocketTunnelModule - Loading JSR-356 WebSocket support... I have copied the relevant JAR to: /guacamole/lib/ /guacamole/classpath/ /guacamole/extensions/ (/guacamole is linked at /usr/share/tomcat/.guacamole) /usr/share/tomcat/lib/ /usr/share/tomcat/lib/ /usr/share/tomcat/webaps/guacamole/WEB-INF/lib I can't think of anywhere else to copy this JAR. The JAR is the exact name and version. Any ideas? -- View this message in context: http://apache-guacamole- incubating-users.2363388.n4.nabble.com/Error-when-trying- to-use-MySQL-Authentication-in-CentOS-7-tp975.html Sent from the Apache Guacamole (incubating) - Users mailing list archive at Nabble.com.
