I have an ongoing problem with the stability of our Cold Fusion Server:
Version details:
CF Server: 4.01 Professional.
OS: NT 4 SP 5
Web Server: IIS 4
Database: SQL Server 7 SP 2 via ODBC
Hardware: Dual PIII 500 MHz / 512 MB RAM
At present the web site is checked every 2 minutes and if a problem is
detected CF server is restarted. If that does not fix things CF and IIS
are restarted 2 minutes later. Eventually, after 2 more attempts at
correcting via restarts of CF and IIS (sometimes "net stop" does not work
and I need to kill the inetinfo process), I escalate to a restart of the
server. That usually fixes it!
The problem seems unrelated to hardware, as it occurs on both the main and
standby servers, I had to switch to the standby server when corruption
caused WINSRV.DLL to disappear and the main server blue-screened on restart.
Cold Fusion server is regularly restarted at 03:40am every day.
The failure pattern correlates very loosely with usage but there seems
little reason for the observed peaks in the failure pattern for 00:00-00:59
and 02:00-02:59 hours local time. Interestingly in October I have no
failures on Saturdays or between 03:00 and 06:59.
I am concerned that it is associated with the CF code as restarting CF
server seems to fix these errors on occasion but I am running out of ideas.
I have so far fixed constructs where CFSET was not setting a variable eg.
<CFSET StructInsert(struct,key,var)> and ensured all references to
application and session scoped variables are within <CFLOCK> ... </CFLOCK>
using NAME=#application.applicationName# and NAME=#session.sessionID# as
appropriate. Although these have helped stability to some extent the
failures continue.
The last item I am correcting is the use of nested, ungrouped <CFOUTPUT>
tags due to the use of CFINCLUDEs and CFMODULEs. I have no idea if these
are significant or not but as the CF documentation says "You cannot nest
CFOUTPUT tags." I am hopeful.
I have put in process an upgrade to CF 4.5.1 but that may be some time in
coming and if the problem is within the CF code I am unsure if it will help.
Is there anything else I should be investigating?
Bruce Ford [EMAIL PROTECTED]
Online Teaching Systems Coordinator
Teaching and Learning Support Services Ph: +61 7 3864 9773
Queensland University of Technology
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