CODEWITHSUNDEEP
coldfusion
Prabha
Prabha

Reputation: 273

coldfusion null pointer exception in cfloop

I'm getting an issue as "Error Occurred While Processing Request The system has attempted to use an undefined value, which usually indicates a programming error, either in your code or some system code.

Null Pointers are another name for undefined values."

I verified all posts related to NPException & most of the issues are related to cfquery, cfhttp......This issue is with in cfloop iteration in cfc function (Y) I have two functions X & Y. Y is called by X multiple times with in the loop. This loop is in cflock tag with timespan=5

function X :
============
<cfset Var array = getXML()>
<cfargument name="searchOnly" type="boolean" required="false">
<cfset Var i = "">
inside loop Y method is called
<cflock scope="Session" type="exclusive" timeout="5">
<cfloop from="1" to="#ArrayLen( array )#" index="i">
<cfset fields = Y( array[i], Arguments.searchOnly )>
</cfloop>
</cflock>
===========

function Y :
============

<cffunction name=“Y”>
<cfargument name="root" required="true">
<cfargument name="searchOnly" type="boolean" required="false">
<cfset Var i = "">
<cfloop index="i" from="1" to="#ArrayLen( Arguments.root.XMLChildren     )#">
<cfset childNode = Arguments.root.XMLChildren[i]> ---> this line causes   an error


<cfif Arguments.root.XMLName neq "match">
<!--- Recursive call --->
<cfset Y( labeledElements, Y( childNode ) )>
</cfif>

Is there any issue with Recursive call with in the same cfloop.
</cfloop>
</cffunction>

Variable i is declared in these two cffunctions, is this raising any issue with same variable name i. Please share your thoughts

Upvotes: 1

Views: 699

Answers (1)

Adam Cameron
Adam Cameron

Reputation: 29870

You're not var-ing childNode, so you will be overwriting the outer call's variable with the recursive call's one. This will make the process unstable, and unsurprising that you get unexpected results / errors.

I imagine that's your problem.

Upvotes: 3

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