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ColdFusion sites stop responding to http requests

New Here ,
Aug 09, 2013 Aug 09, 2013

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I have 4 sites running under 1 instance of CF 10 STD. every now and then no regular pattern 2 of the smaller sites stop responding to http requests. Has anyone seen the issue before?  When this issue first occured I seen it happeneing durning the client variable purge I have since disabled the registry purge and placed the client variables in an SQL DB.  The issue stoped for about a week but now it has come back and not on any type of regular interval or pattern.

Log files are no help at all.

OS: Windows 2008 R2

CPU: 1 vCPU

RAM: 4GB

IIS 7.5

Server Product ColdFusion
Version 10,0,10,284825
Tomcat Version 7.0.23.0
Edition Standard  
Serial Number 118750067037389643140965  
Operating System Windows Server 2008 R2  
OS Version 6.1  
Update Level /E:/ColdFusion10/cfusion/lib/updates/chf10000010.jar  
Adobe Driver Version 4.1 (Build 0001)  

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Enthusiast ,
Aug 09, 2013 Aug 09, 2013

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Hi Steve

Web Server : IIS 7.5

Application Server : ColdFusion 10 update level 10

Running under 1 instacne : cfusion (say)

Number of sites = 4

2 of the smaller sites stop responding http requests and rest of the 2 are working fine.

I believe this is the scenario here. Please correct, if I am wrong?

All 4 sites have .cfm or only 2 of them which are not working?

Have you configured connector with All or individual for all sites?

On those 2 sites, if you have .cfm and .html, is the issue only with .cfm?

Is the issue specific to some .cfm applications?

There are various ways to check the behavior of requests on those 2 sites.

Verbose Logging, You can use charles proxy which will let you know that is CodlFusion is the root cause for not serving those requests

NOTE : Above 2 methods strictly during maintenance.

If the traffic is too high on those 2 sites, check the tuning article : http://blogs.coldfusion.com/post.cfm/tuning-coldfusion-10-iis-connector-configuration

Thanks

VJ

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New Here ,
Aug 09, 2013 Aug 09, 2013

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All 4 sites are running .cfm pages

Connector is configured with individual sites.

The issue appears to be .cfm although I have not tested the .html pages that are associated to the sites.  The Index page is .cfm  I will test html acces when the site goes down again.

The 2 sites which stop responding are very small and composed of static .cfm pages "Not very complex".  

The smaller sites thaty drop out usually generate 2 to 4 MB of log traffic a day.

The other 2 sites are the heavy hitters with one generating around 200 to 300 MB log files a day and the other 20 to 30 MB a day.   These 2 heavy sites never drop out.

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New Here ,
Aug 13, 2013 Aug 13, 2013

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Ok  the site just went down and I have confirmed that html and .cfm, all stop working for the 2 smaller sites.

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Enthusiast ,
Aug 13, 2013 Aug 13, 2013

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Hi Steve,

Are you running individual app pool for every website?

Add a new site under IIS with it's own app pool. Add  .html pages only and test the behaviour. If everything works fine, then create connector for this new website and add the behaviour with both .html and .cfm.

If you encounter the same issue, make sure you collect the logs. If possible, collect the verbose logs : http://helpx.adobe.com/coldfusion/kb/enable-verbose-logging-coldfusion-10.html

NOTE : Test the above strictly during maintenance window so that production will not be affected at all.

Thanks

VJ

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