uncaught exception: Illegal state: already disconnected

[perissf]

Hi there

Using CometD 2.4.3 in a JSF web application with jQuery on the client side, I have the exception mentioned in the title when invoking this JS code:

$.cometd.subscribe('/price', function(message) { alert(message)});

 

The JS code is fired from the server through JSF servlet, after the page is loaded and running.

 

The JS code that is already loaded in the web page looks like this (inspired from the primer):

 

(function($)
{
    var cometd = $.cometd;

    $(document).ready(function()
    {

        ....
        // Disconnect when the page unloads
        $(window).unload(function()
        {
            cometd.disconnect(true);
        });

        cometd.configure({
            url: contextPath + "cometd",
            logLevel: "debug"
        });
        cometd.addListener('/meta/handshake', _metaHandshake);
        cometd.addListener('/meta/connect', _metaConnect);

    });
})(jQuery);
       

No other relevant JS messages are given.

I am quite new to jQuery / JS, so I am not sure if this information is not enough. In case, please let me know.

 

 

[perissf]

A quick update: the same error appears when the subscribe command is launched from a client side event, so the JSF stack appears to be irrelevant to the problem.

[Simone Bordet]

Hi,

So where is the handshake() ?

Simon
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[perissf]

Hi Simon,

thanks for the answer. The handshake was effectively already there, but for some reasons it was not invoked. After a bit of debugging I have fixed it.