I have several apps out there written in GWT 2.4 Over the last few months, users have started to complain about seemingly random RPC failures, both reading and writing. I have never yet experienced these errors from my own computer, but there are enough users writing in about it that it seems that there must be something going wrong -- not just one user with a questionable internet connection.
The manifestation in the onFailure() method of an AsyncCallback is usually com.google.gwt.user.client.rpc.StatusCodeException: 0 I found one cooperative user who has been willing to beat on the apps for me and send me results.He gets the errors with Firefox 8, IE 8, and Chrome.When the RPC calls work, I see custom log messages in the tomcat log. When the calls do not work, I see no evidence of any activity in either the tomcat log or the apache log, so it appears that the RPC calls are not reaching the server. This morning I changed one of the apps to include a symbol table, and to print out a stack trace in a dialog when the failure happens, and then asked my precious user to try it. He sent back this stack trace, copied from the dialog: fail to write CAUGHT com.google.gwt.user.client.rpc.StatusCodeException: 0 0 : Unknown.Em(StackTraceCreator.java:168) 1 : Unknown.Jl(StackTraceCreator.java:421) 2 : Unknown.RF(StatusCodeException.java:35) 3 : Unknown.bH(RequestCallbackAdapter.java:209) 4 : Unknown.bs(Request.java:287) 5 : Unknown.Bs(RequestBuilder.java:395) 6 : Unknown.anonymous(XMLHttpRequest.java:287) 7 : Unknown._l(Impl.java:168) 8 : Unknown.cm(Impl.java:213) 9 : Unknown.anonymous(Impl.java:57) In broad strokes, I understand that the exception is thrown because the browser is unable to do an XMLHttpRequest. But more than that, why? I have looked up the line references in the 2.4 source modules mentioned in the stack trace above, but am still at a loss. The last one is this: public final native void setOnReadyStateChange(ReadyStateChangeHandler handler) /*-{ // The 'this' context is always supposed to point to the xhr object in the // onreadystatechange handler, but we reference it via closure to be extra sure. var _this = this; this.onreadystatechange = $entry(function() { 287: handl...@com.google.gwt.xhr.client.ReadyStateChangeHandler::onReadyStateChange(Lcom/google/gwt/xhr/client/XMLHttpRequest;)(_this); }); }-*/; Any suggestions would be greatly appreciated. -- You received this message because you are subscribed to the Google Groups "Google Web Toolkit" group. To view this discussion on the web visit https://groups.google.com/d/msg/google-web-toolkit/-/2TVvDKQzwkkJ. To post to this group, send email to google-web-toolkit@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.