Dan*_*ort 2 coldfusion coldfusion-8
进一步阅读之前的要点
我有一个非常奇怪的间歇性错误,我似乎无法追查.这是背景(这些都被严格修剪以简化发布).
FeedService.cfc:
<cfcomponent output="false" extends="FeedDAO">
<cffunction name="processXmlFile" access="public" output="false" returntype="struct">
<cfset Var local = StructNew() />
/***************************************
THE VARIABLES ARE ALL VAR'D - PROMISE!!!
Lots of other stuff goes on in here to get the ultimate set of XML nodes to loop through
*****************************************/
<cfloop from="1" to="#ArrayLen(local.arrChannels)#" index="local.currentChannelItem">
... Lots of XML parsing and stuff and things going on here ...
<cfset LOCAL.invCheck = checkCustomerListing(
Acct_ID = local.invStruct.AcctID
, CustomerListingID = local.invStruct.CustomerListingID
) />
... Lots more stuff going on here ...
</cfloop>
</cffunction>
</cfcomponent>
FeedDAO:
<cfcomponent output="false">
<cffunction name="checkCustomerListing" access="public" output="false" returntype="numeric" hint="Returns the numeric inventory ID for an existing inventory listing, or 0 if the listing doesn't exist.">
<cfargument name="Acct_ID" type="numeric" required="true" hint="" />
<cfargument name="CustomerListingID" type="string" required="true" hint="" />
<cfset var rs = "">
<cfquery name="rs" datasource="#Variables.DSNs.Primary#">
SELECT ID FROM TheTable
WHERE
Acct_ID = <cfqueryparam cfsqltype="cf_sql_integer" value="#Arguments.Acct_ID#" />
AND Customer_Listing_ID = <cfqueryparam cfsqltype="cf_sql_varchar" value="#Arguments.CustomerListingID#" />
</cfquery>
<cfif rs.RecordCount>
<cfreturn rs.Inv_ID />
<cfelse>
<cfreturn 0 />
</cfif>
</cffunction>
</cfcomponent>
我正在调用这样的初始函数:
<cfset processStruct = Server.FeedService.processXmlFile(filePath) />
因此,当Feed被提交到processXMLFile函数时,它会查看文件中的所有项目.Feed文件可能包含10个,100个甚至1000个条目.在处理文件时偶尔会收到类似的错误消息:
[struct]
Detail: The symbol you provided checkCustomerListing is not the name of a function.
Message: Entity has incorrect type for being called as a function.
StackTrace: coldfusion.runtime.CfJspPage$UninvocableEntityException: Entity has incorrect type for being called as a function.
at coldfusion.runtime.CfJspPage._invokeUDF(CfJspPage.java:2441)
at coldfusion.runtime.SuperScope.invoke(SuperScope.java:18)
at coldfusion.runtime.CfJspPage._invoke(CfJspPage.java:2222)
更多堆栈转储信息
Type: Application
symbolName: checkCustomerListing
[object of coldfusion.runtime.CfJspPage$UninvocableEntityException]
Class Name: coldfusion.runtime.CfJspPage$UninvocableEntityException
Fields:
java.lang.String symbolName: checkCustomerListing
Parent Class: [object of coldfusion.runtime.ApplicationException]
Class Name: coldfusion.runtime.ApplicationException
Parent Class: [object of coldfusion.runtime.NeoException]
Class Name: coldfusion.runtime.NeoException
Methods:
findAdvancedCFTarget(coldfusion.runtime.AdvancedCFException, java.lang.String[]) returns int
findCustomTarget(coldfusion.runtime.CustomException, java.lang.String[]) returns int
findThrowableTarget(java.lang.Throwable, java.lang.String[]) returns int
getDetail() returns java.lang.String
getLocalizedMessage() returns java.lang.String
getMessage() returns java.lang.String
getRootCause() returns java.lang.Throwable
getString(java.lang.Throwable, java.lang.String, java.util.Locale) returns java.lang.String
getType() returns java.lang.String
setLocale(java.util.Locale) returns void
unwrap(java.lang.Throwable) returns java.lang.Throwable
Parent Class: [object of java.lang.RuntimeException]
Class Name: java.lang.RuntimeException
Parent Class: [object of java.lang.Exception]
Class Name: java.lang.Exception
Parent Class: [object of java.lang.Throwable]
Class Name: java.lang.Throwable
Methods:
fillInStackTrace() returns java.lang.Throwable
getCause() returns java.lang.Throwable
getLocalizedMessage() returns java.lang.String
getMessage() returns java.lang.String
getStackTrace() returns java.lang.StackTraceElement[]
initCause(java.lang.Throwable) returns java.lang.Throwable
printStackTrace(java.io.PrintWriter) returns void
printStackTrace(java.io.PrintStream) returns void
printStackTrace() returns void
setStackTrace(java.lang.StackTraceElement[]) returns void
toString() returns java.lang.String
我可能会在1000个条目中收到一个错误,或者我可能会同时收到一小批错误,其余的Feed进程也很好(由于一些try/catch逻辑可以防止整个事情被淘汰).有一次,它checkCustomerListing是一个完全不同的服务器范围对象,我从来没有遇到过问题.我将它移入FeedDAO并通过超级范围开始调用它,这就是这些间歇性错误开始的时候.
更新:我有一切正确的变化,我只是为了简洁而全部切碎.
再次更新:更改了代码示例注释,以明确在第一个循环开始之前有很多内容正在进行,包括设置将在循环中使用的所有LOCAL变量.
更多代码信息:我应该注意,我们的整个应用程序中只有两个位置(成千上万行代码),其中存在字符串'checkCustomerListing'.一个是调用函数的地方,两个是声明函数的地方.checkCustomerListing任何地方都没有其他字符串实例.
更新:2011年9月6日
我添加了一些额外的错误检查,看看我是否能找到应用程序的想法checkCustomerListing(感谢Adam和Ryan).这是我的新try/catch语句:
<cfcatch type="any">
<cfset local.tmpError.cfcatch = cfcatch>
<cfif isDefined("checkCustomerListing")>
<cfset local.tmpError.customerListing = checkCustomerListing />
<cfset local.tmpError.customerListingMeta = getMetaData(checkCustomerListing) />
<cfelse>
<cfset local.tmpError.customerListing = "Checkcustomerlisting is not defined" />
</cfif>
<cfset Server.Utilities.Errors.emailCaughtError(local.tmpError)>
</cfcatch>
所以我今天早上收到错误,在收到的电子邮件customerListing中,转储中没有节点,但有一个元节点:
CUSTOMERLISTINGMETA:
[struct]
ACCESS: public
HINT: Returns the numeric inventory ID for an existing inventory listing, or 0 if the listing doesn't exist.
NAME: checkCustomerListing
OUTPUT: false
PARAMETERS:
[array]
1) [struct]
HINT: [empty string]
NAME: Acct_ID
REQUIRED: true
TYPE: numeric
2) [struct]
HINT: [empty string]
NAME: CustomerListingID
REQUIRED: true
TYPE: string
RETURNTYPE: numeric
所有这些元信息都是完全正确的...所以如果它能找到函数的元数据,为什么它不能找到函数本身呢？
这通常是由于缺乏VARing而导致的,正如其他人所暗示的那样.通常人们都有一个名为"getStuff"的私有函数,并且在其中有一个名为"getStuff"的查询.如果变量不是VARed,那么getStuff查询结果将进入CFC的变量范围,这将覆盖函数getStuff,因为它也位于变量范围内.
因此,请检查checkCustomerListing对任何非VARed(或在本地范围内)的同名变量的使用情况.
(并注意checkCustomerListing变量不需要在同一方法内发生......它可能在CFC中的任何地方或任何扩展或超级CFC ......)