FF3.6 Stack output from Too Much Recursion
Hi,
Sorry for labouring on this but I upgraded to FireFox 3.6 and managed to get
a bit more useful output that might ring a bell with somebody. The following
is a dump of the exception properties that was thrown from the code below
(Search for "4" to locate the source): -
Client: Error calling callback routine: -
Property: message Value: too much recursion
Property: fileName Value: http://192.168.1.190/tier3/Randomator.html
Property: lineNumber Value: 254
Property: stack Value:
()@http://192.168.1.190/tier3/Randomator.html:254
("3100369Lapointe, Hope FLarge Systems Engineering $57,410.00
$41,438.00")@http://192.168.1.190/tier3/Randomator.html:245
("3100369Lapointe, Hope FLarge Systems Engineering $57,410.00
$41,438.00",0,153)@http://192.168.1.190/tier3/Tier3Client.js:194
("30",[unknown
function],false)@http://192.168.1.190/tier3/Tier3Client.js:239
(12)@http://192.168.1.190/tier3/Randomator.html:328
Property: name Value: InternalError
toString() = InternalError: too much recursion
msgSlotId = 0
msgSeqNum = 153
responseMsg = 3100369Lapointe, Hope FLarge Systems Engineering $57,410.00
$41,438.00
As you may recall, the problem is that there is no recursion or at least
shouldn't be. If there is only one EmpPicker() in Ransomator.html (I'll
attach that again next) then the code runs all day as soon as there are two
or more then the code dies after 153 (150 to 155) iterations.
I've looked at about:config and can't see anything relevant but am led to
believe the FF stack depth to be 3000; either way I just can't see from that
"stack" output what it's complaining about :-(
This is the way the code/stack flows:-
Randomator.html calls the SEND("30",positionDiv,false) method on the
Tier3Client (T3Client) object line 328
Tier3Client.js "waits" at its applet call to "return chan.send" line 239
Tier3Client.js gets called back from the applet and does a callback.apply at
line 194
Randomator.html get screnn dimensions via "var canvas = " line 245
Randomator.html now varies the exact line of the exception around: -
254) height = window.innerHeight
265) if (typof window.pageYOffset ==
194) tier3Client.appendconsoleMessage
Any ideas what's happening? FF2 is fine, IE and Chrome do not exhibit this
problem :-(
1) Is "canvas" now a dodgy reserved word?
2) Is setTimeout with zero millises some sort of optimized "inline" call and
does not place a *non-recursive* event on the Event Dispatching Thread?
I have the console and FireBug off and the problem still occurs.
Cheers Richard Maher
/**
* Copyright (c) Richard Maher. All rights reserved.
*
* Tier3Client class bridges Javascript and Applet
* functionality.
*/
function Tier3Client(application,
codeBase,
port,
maxBuf,
hostCharSet,
sslReqd,
guiToolkit,
idleTimeout,
verbosity)
{
if (arguments.length < 4) {
throw new Error("Insufficient arguments for Tier3Client");
}
if (!navigator.javaEnabled()) {
alert("You must enable Java Applets in your browser\n" +
"before you can successfully access this page");
throw new Error("Java Applets are not enabled for browser");
}
this.application = application;
this.codeBase = codeBase;
this.port = port;
this.maxBuf = maxBuf;
this.hostCharSet = (hostCharSet == undefined) ? "ISO-8859-1" :
hostCharSet;
this.sslReqd = (sslReqd == undefined) ? "N" :
sslReqd;
this.guiToolkit = (guiToolkit == undefined) ? Tier3Client.GUIAWT :
guiToolkit;
this.idleTimeout = (idleTimeout == undefined) ? 0 :
idleTimeout;
this.verbosity = (verbosity == undefined) ? Tier3Client.WARNING :
verbosity;
var appletId = "Tier3__" + this.application + "_Applet";
try {
var idTaken = document.getElementById(appletId);
}
catch (err) {};
if (idTaken != null) {
throw new Error("Tier3 Client already registered for " +
this.application);
return;
}
var archiveName = "tier3Client.jar";
var className = "tier3Client/Tier3Application";
var appletParams = [{"name":"archive",
"value":archiveName },
{"name":"codebase",
"value":codeBase },
{"name":"code",
"value":className },
{"name":"java_version",
":"1.6+" },
{"name":"mayscript",
lue":"true" },
{"name":"scriptable",
ue":"true" },
{"name":"codebase_lookup",
"false" },
{"name":"APPLICATION",
"value":application },
{"name":"PORT",
"value":port },
{"name":"MAXBUF",
"value":maxBuf },
{"name":"HOSTCHARSET",
"value":this.hostCharSet},
{"name":"SSLREQD",
"value":this.sslReqd },
{"name":"GUITOOLKIT",
"value":this.guiToolkit },
{"name":"IDLETIMEOUT",
"value":this.idleTimeout},
{"name":"VERBOSITY",
"value":this.verbosity }];
var startParam = 0;
var objectTag = "<object classid=";
if (/Internet Explorer/.test(navigator.appName)) {
objectTag = objectTag +
'"clsid:8AD9C840-044E-11D1-B3E9-00805F499D93" ';
} else {
objectTag = objectTag +
'"java:' + className + '.class" type="application/x-java-applet"
' +
'archive="' + codeBase + archiveName + '" ';
startParam = 1;
}
objectTag = objectTag + ' width= "0" height= "0" id="' + appletId +
'">';
for (i=startParam; i<appletParams.length; i++){
objectTag = objectTag + '<param name ="' + appletParams[i].name +
'" ' +
'value ="' + appletParams[i].value +
'">';
}
objectTag = objectTag + "</object>";
var appletDiv = document.createElement("div");
appletDiv.innerHTML = objectTag;
try {
document.body.appendChild(appletDiv);
this.chan = document.getElementById(appletId);
}
catch(err) {
alert("Tier3 unable to load applet for " + this.application +
": -\n" +
(err.description||err.message));
this.chan = null;
};
if (this.chan == null) {
throw new Error("Tier3 was unable to initialize the applet for " +
this.application);
} else {
try {
if (!this.chan.isAuthorized()) {
throw new Error("Tier3 User Authentication unsuccessful");
}
}
catch(err) {
this.chan.setAttribute("id",null);
this.chan = null;
throw new Error("Tier3 unable to load applet for " +
this.application + ": -\n" +
(err.description||err.message));
}
}
Tier3Client.applications[this.application] = this;
return this;
}
Tier3Client.FACPREFIX = "T3$";
Tier3Client.MAJVERS = 1;
Tier3Client.MINVERS = 0;
Tier3Client.GUIAWT = 1;
Tier3Client.DEBUG = 0;
Tier3Client.INFO = 1;
Tier3Client.WARNING = 2;
Tier3Client.ERROR = 3;
Tier3Client.FATAL = 4;
Tier3Client.errorPage = "Tier3Error.html";
Tier3Client.logoffPage = "Tier3Logoff.html";
Tier3Client.launder =
function(jsobject) {
return jsobject;
};
Tier3Client.prototype = {
send:
function(msgBody, callback, async)
{
if (arguments.length < 2) {
throw new Error("Insufficient arguments for send(msgBody,
callback)");
}
if (typeof callback != "function") {
throw new Error("The 'callback' parameter must be a
function");
}
var noWait = true;
if (arguments.length > 2) {
if (typeof async != "boolean") {
throw new Error("The 'async' parameter must be a
boolean");
}
noWait = async;
}
var chan = this.chan;
var callbackArgs = new Array();
var responseCnt = 0;
var i = 0;
var msgCandidate =
{
msgSlotId : -1,
msgSeqNum : -1,
chan : chan,
callback : callback,
callbackArgs : callbackArgs,
dispatcher :
function(responseMsg,
msgSlotId,
msgSeqNum)
{
fadeSecs.value = msgSeqNum;
empsCnt.value = "1";
empsCnt.value = "1.1";
this.responseCnt++;
empsCnt.value = "1a";
this.msgSlotId = msgSlotId;
empsCnt.value = "1b";
this.msgSeqNum = msgSeqNum;
empsCnt.value = "1c";
callbackArgs[0] = responseMsg;
try {
empsCnt.value = "2";
callback.apply(this, callbackArgs);
empsCnt.value = "3";
}
catch (err) {
empsCnt.value = "4";
var errMsg = "Error calling callback
routine: -\n";
for (var prop in err) {
errMsg += " Property: " + prop + " Value: " +
err[prop] + "\n";
}
errMsg += " toString() = " + err.toString() +
"\n";
errMsg += " msgSlotId = " + msgSlotId + "
msgSeqNum = " + msgSeqNum + "\n";
errMsg += " responseMsg = " + responseMsg;
// console.log("Client: " + errMsg);
document.write("Client: " + errMsg);
empsCnt.value = "5";
this.chan.appendConsoleMsg("Client: " +
errMsg);
empsCnt.value = "6";
throw new Error(errMsg);
}
empsCnt.value = "7";
},
getMsgSeqNum :
function() {
return this.msgSeqNum;
},
getResponseCnt:
function() {
return this.responseCnt;
},
rendezvous :
function() {
return chan.rendezvous();
}
};
for (i=3; i<arguments.length; i++) {
callbackArgs[i - 2] = arguments[i];
}
return chan.send(msgCandidate, msgBody, noWait);
},
appendConsoleMsg:
function(msg)
{
this.chan.appendConsoleMsg(msg);
}
};
Tier3Client.applications = {};