Emma It sounds like you haven't deployed the mysql driver.
Paul -----Original Message----- From: Emma Cole <emma.cole.positive.vo...@gmail.com> Date: Mon, 31 May 2010 16:46:59 To: Google Web Toolkit<google-web-toolkit@googlegroups.com> Cc: <dan.a...@gmail.com> Subject: Hibernate problems after deploying to google appspot Hi all, I have an application which uses hibernate that runs fine in hosted mode, but no longer when deployed. Here's the details: In hosted mode it connects to a database that resides on a remote server. Connection details set in hibernate.cfg.xml When run I it get a long stacktrace with errors similar to the following: SEVERE: Unable to instrument com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter $ValueWriter$8. Security restrictions may not be entirely emulated. Which apparently has to do with the fact that it's being run in hosted mode, and I read that it can be ignored. The application saves and retrieves data without problems. After deploying it on appspot and when I try to save a new row in a table I get this: javax.servlet.ServletContext log: Exception while dispatching incoming RPC call com.google.gwt.user.server.rpc.UnexpectedException: Service method 'public abstract boolean com.appspot.positivevoice.client.panels.blog.BlogService.saveBlog(com.appspot.positivevoice.client.models.BlogModel)' threw an unexpected exception: java.lang.NoClassDefFoundError: Could not initialize class com.mysql.jdbc.ConnectionImpl at com.google.gwt.user.server.rpc.RPC.encodeResponseForFailure(RPC.java: 378) at com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse(RPC.java: 581) Since the app works fine in hosted mode ( apart from those exceptions ) I am not even sure which files I should add to the post... Any idea much appreciated! Thanks -- 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. -- 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.