tracker issue : CF-4204013

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ClassCastException for gateway attribute value

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Status/Resolution/Reason: To Fix//BugReVerified

Reporter/Name(from Bugbase): A. B. / ()

Created: 02/11/2019

Components: Event Gateway

Versions: 2018

Failure Type: Incorrectly functioning

Found In Build/Fixed In Build: 2018.0.01.311402 /

Priority/Frequency: Major / Some users will encounter

Locale/System: / Win 2016

Vote Count: 0

Problem Description: 
We used an attribute of type integer in calling a ColdFusion event gateway. So far, it has worked without problems in every version of ColdFusion until now. 

Unlike previous ColdFusion versions, ColdFusion 2018 apparently distinguishes between integer (java.lang.Integer) and string (java.lang.String) for the gateway attribute. This results in java.lang.ClassCastException

Steps to Reproduce:
1) Create an event gateway called classCastExceptionTestGW in the usual way, including of course a listener CFC.
2) Write a CFM calling page, testGateway.cfm, containing the following code:
	aSyncData = {};
	aSyncData.timeout = 60;
	sendGatewayMessage("classCastExceptionTestGW", aSyncData);
3) Launch testGateway.cfm to run the gateway 

Actual Result:
You will get 2 types of Error messages:
"Error","ajp-nio-8022-exec-8","02/11/19","10:39:00","StudiemeterStaging2018","'' The specific sequence of files included or processed is: Absolute\path\to\testGateway.cfm'' "

"Error","ajp-nio-8022-exec-6","02/09/19","10:52:00","StudiemeterStaging2018","java.base/java.lang.Integer cannot be cast to java.base/java.lang.String The specific sequence of files included or processed is: E:\wwwroot\staging2018_studiemeter_nl\htdocs\scheduled\StartResultsQueue.cfm, line: 5 "
java.lang.ClassCastException: java.base/java.lang.Integer cannot be cast to java.base/java.lang.String

Expected Result:
No such errors. After all, ColdFusion is weakly-typed and backward-compatible.

Any Workarounds:
Change the timeout attribute value from integer (60) to string ("60")