Getting an odd error, please help!

Dan, this is good maybe! Or at least sending me in the right direction..

What settings did you have to adjust in order to get the errors to stop?

Adam, thanks for your reply.  I am setting client variables in my OnRequestStart.  However, I get this error even when I'm not setting variables.  It really is a freak error, as I get it a few times a day, but I can never replicate it.  Below is my OnRequestStart code, and it could be possible that I've set it up wrong?

<cffunction name="OnRequestStart">
<cfargument name = "thisRequest" required="true"/>
    <cfset Request.mydns1 = "mydatabase">
    <cfset Request.CurrentPage=GetFileFromPath(GetTemplatePath())>
    <!--- <cflogout> --->
<cfif isDefined("url.action") and url.action eq "logout">
            <cflogout>
        <cfset onSessionEnd(SESSION) />       
        </cfif>
<!---Here is the Login process--->
        <cflogin>
<cfif isDefined("form.j_username") and isDefined("form.j_password")>
                <cfif len(form.j_username) and len(form.j_password)>
<cfset theSalt = 'saltword' />
<cfset thePass = '#theSalt##FORM.j_password#' />               
               
<cfquery name="loginQuery" dataSource="#Request.mydns1#">
SELECT *
FROM users
WHERE username = <cfqueryparam cfsqltype="cf_sql_varchar" value="#form.j_username#"> AND password = <cfqueryparam cfsqltype="cf_sql_varchar" value="#Hash(thePass, 'MD5')#">
</cfquery>
            <cfif loginQuery.RecordCount EQ 1>

<cfset session.ThisUser = loginQuery.id />
<!--- We set this session var cause we will need it later --->

   
<cfloginuser name="#loginQuery.id#" password="#form.j_password#" roles="1">

<!---begin Who’s Online section --->
<cfparam name="session.whosOnFirst" default="">
<!--- Test for existence of UserInfo and create if necessary  --->
<cflock timeout="15" scope="APPLICATION" type="EXCLUSIVE">
<cfif NOT isDefined("Application.UsersInfo")>
<cfset Application.UsersInfo = StructNew()>
</cfif>
</cflock>
<cfif isDefined('form.j_username')>
<!--- create new user info for the struct --->
<cflock name="#CreateUUID()#" timeout="15" type="EXCLUSIVE">
<cfset user_cfid = Evaluate(CFID) & "," & form.j_username>
<cfset user_time = Now()>
</cflock>
<!--- set a session id so we can use it to verify that this session is still active in application.cfm --->
<cfset session.whosOnFirst = user_cfid>
<cflock scope="APPLICATION" type="EXCLUSIVE" timeout="15">
<!--- If the user does not exist in the struct, insert it --->
<cfif NOT StructKeyExists(Application.UsersInfo, user_cfid)>
<cfset temp = StructInsert(Application.UsersInfo, user_cfid, user_time)>
</cfif>
</cflock>
</cfif>
<!--- end Who’s Online section --->             

                    <cfelse>

                        <cfinclude template="login.cfm">
                        <cfabort>
                    </cfif>
                <cfelse>

                    <cfinclude template="login.cfm">
                    <cfabort>
                </cfif>
            <cfelse>  
               
                <cfinclude template="login.cfm">
                <cfabort>
            </cfif>
        </cflogin>
</cffunction>