Here's the important part of your bug: Exception while dispatching incoming RPC call com.google.gwt.user.client.rpc.SerializationException: Type 'com.mysql.jdbc.exceptions.jdbc4.CommunicationsException' was not included in the set of types which can be serialized by this SerializationPolicy or its Class object could not be loaded
Your code is trying to send a com.mysql.jdbc.exceptions.jdbc4.CommunicationsException via RPC, which it can NOT do. My guess is that your servlet code is throwing that exception, but that is just a guess. But step 1 is to check all your RPC routines, and make sure none of them have a throws clause. On Dec 6, 9:30 am, "du.hahn" <du.h...@gmail.com> wrote: > Hi, I get this error when i connect to a mysql database with eclipse > debug. > > Starting Jetty on port 8888 > [WARN] Exception while dispatching incoming RPC call > com.google.gwt.user.client.rpc.SerializationException: Type > 'com.mysql.jdbc.exceptions.jdbc4.CommunicationsException' was not > included in the set of types which can be serialized by this > SerializationPolicy or its Class object could not be loaded. For > security purposes, this type will not be serialized.: instance = > com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: > Communications link failure > > The last packet sent successfully to the server was 0 milliseconds > ago. The driver has not received any packets from the server. > at > com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serialize(ServerSerializationStreamWriter.java: > 614) > at > com.google.gwt.user.client.rpc.impl.AbstractSerializationStreamWriter.writeObject(AbstractSerializationStreamWriter.java: > 126) > at com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter > $ValueWriter$8.write(ServerSerializationStreamWriter.java:152) > at > com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serializeValue(ServerSerializationStreamWriter.java: > 534) > at com.google.gwt.user.server.rpc.RPC.encodeResponse(RPC.java:609) > at > com.google.gwt.user.server.rpc.RPC.encodeResponseForFailure(RPC.java: > 383) > at > com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse(RPC.java: > 581) > at > com.google.gwt.user.server.rpc.RemoteServiceServlet.processCall(RemoteServiceServlet.java: > 207) > at > com.google.gwt.user.server.rpc.RemoteServiceServlet.processPost(RemoteServiceServlet.java: > 243) > at > com.google.gwt.user.server.rpc.AbstractRemoteServiceServlet.doPost(AbstractRemoteServiceServlet.java: > 62) > at javax.servlet.http.HttpServlet.service(HttpServlet.java:637) > at javax.servlet.http.HttpServlet.service(HttpServlet.java:717) > at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java: > 487) > at > org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java: > 362) > at > org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java: > 216) > at > org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java: > 181) > at > org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java: > 729) > at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java: > 405) > at > org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java: > 152) > at > org.mortbay.jetty.handler.RequestLogHandler.handle(RequestLogHandler.java: > 49) > at > org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java: > 152) > at org.mortbay.jetty.Server.handle(Server.java:324) > at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java: > 505) > at org.mortbay.jetty.HttpConnection > $RequestHandler.content(HttpConnection.java:843) > at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:647) > at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:211) > at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:380) > at > org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java: > 395) > at org.mortbay.thread.QueuedThreadPool > $PoolThread.run(QueuedThreadPool.java:488) > [ERROR] 500 - POST /dbmind/greet (127.0.0.1) 57 bytes > Request headers > Host: localhost:8888 > Connection: keep-alive > Referer:http://localhost:8888/ > Accept: */* > User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US) AppleWebKit/ > 534.7 (KHTML, like Gecko) Chrome/7.0.517.44 Safari/534.7 > Accept-Encoding: gzip,deflate,sdch > Accept-Language: en-US,en;q=0.8 > Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.3 > Content-Length: 184 > Origin:http://localhost:8888 > X-GWT-Module-Base:http://localhost:8888/dbmind/ > Content-Type: text/x-gwt-rpc; charset=UTF-8 > X-GWT-Permutation: 35D485F388E45FAF93FBD6C114AF0A90 > Response headers > Content-Type: text/plain > > Anybody can help me? -- You received this message because you are subscribed to the Google Groups "Google Web Toolkit" group. To post to this group, send email to google-web-tool...@googlegroups.com. To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en.
