GWT module may need to be (re)compiled REDUX

Question

When running in compiled mode I get this dreaded GWT Module \'mymodule\' may need to be (re)compiled dialog message.

I\'ve compiled a list of the things that others

Answer 1

I found the same issue in DevMode if there was a static link to another page in the application (i.e. myModule2.html). Because it lacked the ?gwt.codesvr=127.0.0.1:9997 string, it was interpreted as a static (already compiled) GWT app, which it was not, throwing the error code you mentioned.

Of course the solution is not to use hardcoded literal links, but let GWT make them for you. Hope that helps someone.

UPDATE:

This is the code that throws this error in the standard GWT *.nocache.js file.

function B() {
    var b = false;
    try {
    var c = Window.location.search;
    return (c.indexOf("gwt.hosted=") != -1 
        || (c.indexOf("gwt.codesvr=") != -1
        || Window.external && Window.external.gwtOnLoad)) 
        && c.indexOf("gwt.hybrid") == -1
    } catch (a) {}
    B = function () {
    return b
    };
    return b
}
// and later, if B() returns false, show recompile error
if (!B()) {
    try {
    alert(Pb);
    return;
    }
  ...
}

Thus, to prevent the compiler message

• don't have gwt.hybrid in the URL
• AND DON't have gwt.hosted=
• OR get.codesvr=
• OR a Window.external.getOnLoad method

So, in the case of the popup, some server code was redirecting a DevMode session url, but not adding back the "codesvr=" parameter, hence the warning was shown.