Helicon Tech: ISAPI Rewrite 3 Breaks IIS, 2 Works.

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Helicon Tech : ISAPI_Rewrite 3.0 support forum

Topic: ISAPI Rewrite 3 Breaks IIS, 2 Works.

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davidshq
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Posted: 20 December 2007 at 11:24am \| IP Logged

We've been using ISAPI_Rewrite 2 for a number of months now successfully and everything worked fine. However, after installing the updated ISAPI_Rewrite 3 we began having problems with the websites. They work fine under a light load, but as the load on the server builds performance deteriorates progressively to the point where pages don't load at all. It doesn't matter what sort of page - ASP, ASPX, or HTML. We are running Windows Server 2003 R2, IIS 6.
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davidshq
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Posted: 20 December 2007 at 2:54pm \| IP Logged

Would love some assistance on this. I've been doing some troubleshooting:
1. I've ensured debugging is turned off on all applications.
2. I commented out all the code in the .conf except:
RewriteEngine Off
RewriteCompatibility2 On
RepeatLimit 2
RewriteBase
RewriteRule ^/httpd(?:\.ini\.parse\.errors)$ / [NC,F,O]
RewriteRule ^.*\.isrwhlp$ / [NC,F,O]
David.

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davidshq
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Posted: 20 December 2007 at 3:46pm \| IP Logged

I backed off the upgrade and just went back to v. 2. But sure would like to upgrade to 3 at some point.
David.

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Anton
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Posted: 21 December 2007 at 3:12am \| IP Logged

If you have "RewriteEngine Off" directive in your config, ISAPI_Rewrite will not process rules at all. You should put "RewriteEngine On" to make it work.

Also please tell what version (and build) of ISAPI_Rewrite are you using.

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davidshq
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Posted: 21 December 2007 at 8:53am \| IP Logged

Sorry, I turned that off to test if just having the ISAPI installed caused problems, but I've actually been running it with that on. The ISAPI installed doesn't cause a problem - its only when its actually processing. I downloaded the latest version yesterday and that is the one giving issues. As I mentioned, v. 2 works fine.
David.

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Anton
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Posted: 24 December 2007 at 4:49am \| IP Logged

What version (and build) of ISAPI_Rewrite are you using?
Please provide IIS and rewrite logs records for your request.

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Anton

espares
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Posted: 30 January 2008 at 3:22am \| IP Logged

I am having the same problem with our production servers. I am running version 3, 0, 0, 31. This is causing some major issues as most of our site returns 404 errors when ISAPI Rewrite fails. It takes an "iisreset" to get it working again.

There is nothing in the error.log except the normal "ISAPI Filter loaded" lines.

Anton
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Posted: 30 January 2008 at 4:41am \| IP Logged

Please tell your system configuration and provide rewrite and IIS logs records.

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espares
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Posted: 30 January 2008 at 4:48am \| IP Logged

We are running HP DL380G5 dual processor (Quad Core Xeon E5335) web servers with 4GB RAM. These are running Windows Server 2003 SP2, IIS and the web sites run ASP.NET 2.0.

Our IIS logs are huge so I can't really provide them here - can you specify whether I should be looking for anything specific within them?

Here is the error.log for 25/01/2008 - ISAPI Rewrite stopped working on this day at around 11am until I performed an iisreset.

[25/01/2008 09:43:50] ISAPI Filter loaded
[25/01/2008 11:37:26] ISAPI Filter loaded
[25/01/2008 11:43:29] ISAPI Filter loaded
[25/01/2008 11:43:30] ISAPI Filter loaded
[25/01/2008 11:43:31] ISAPI Filter loaded
[25/01/2008 11:43:42] ISAPI Filter loaded
[25/01/2008 11:43:43] ISAPI Filter loaded
[25/01/2008 11:43:46] ISAPI Filter loaded
[25/01/2008 11:44:38] ISAPI Filter loaded
[25/01/2008 11:50:54] ISAPI Filter loaded
[25/01/2008 12:12:59] ISAPI Filter loaded
[25/01/2008 12:25:59] ISAPI Filter loaded
[25/01/2008 12:56:52] ISAPI Filter loaded
[25/01/2008 13:05:20] ISAPI Filter loaded
[25/01/2008 13:21:18] ISAPI Filter loaded
[25/01/2008 13:36:47] ISAPI Filter loaded
[25/01/2008 14:03:05] ISAPI Filter loaded
[25/01/2008 14:06:37] ISAPI Filter loaded
[25/01/2008 14:33:37] ISAPI Filter loaded
[25/01/2008 15:19:19] ISAPI Filter loaded
[25/01/2008 16:38:34] ISAPI Filter loaded
[25/01/2008 17:16:45] ISAPI Filter loaded
[25/01/2008 18:59:42] Begin watch directory changes - FAILED. (D:\Web\eSpares\remotecontrols\grundig\p50-640ft\gb\p\1090\526\0\'http:\)
[25/01/2008 18:59:42] Begin watch directory changes - FAILED. (D:\Web\eSpares\remotecontrols\grundig\p50-640ft\gb\p\1090\526\0\'http:\www.espares.co.uk\)
irectory changes - FAILED. (D:\Web\ExpressSpares\styles\~\file:\image2000\spider\)
[25/01/2008 18:14:57] Begin watch directory changes - FAILED. (D:\Web\ExpressSpares\styles\~\file:\image2000\spider\NetWatch.Html\)
[25/01/2008 18:14:57] Begin watch directory changes - FAILED. (D:\Web\ExpressSpares\styles\~\file:\image2000\spider\NetWatch.Html\20080125\)
[25/01/2008 18:14:57] Begin watch directory changes - FAILED. (D:\Web\ExpressSpares\styles\~\file:\image2000\spider\NetWatch.Html\20080125\www.expressspares.co.uk\)
[25/01/2008 18:14:57] Begin watch directory changes - FAILED. (D:\Web\ExpressSpares\styles\~\file:\image2000\spider\NetWatch.Html\20080125\www.expressspares.co.uk\NWSC.8cb6d5bd-95af-49b5-bac9-908e26582162\)
[25/01/2008 19:30:28] ISAPI Filter loaded
[25/01/2008 20:02:47] ISAPI Filter loaded
[25/01/2008 20:39:02] ISAPI Filter loaded
[25/01/2008 21:14:14] ISAPI Filter loaded

Anton
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Posted: 30 January 2008 at 5:50am \| IP Logged

I need IIS logs records for the moment of ISAPI_Rewrite failure or some other problems.
Please also show you config file and rewrite logs (also at the moment of failure)

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espares
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Posted: 30 January 2008 at 5:51am \| IP Logged

Our config file is also quite large - can I email these to you directly rather than on this forum?

Anton
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Posted: 30 January 2008 at 7:38am \| IP Logged

Sure, please send it to support@helicontech.com

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davidshq
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Posted: 30 January 2008 at 8:41am \| IP Logged

If you resolve this issue I would be very interested to hear the resolution. At this time I have reverted back to version 2 until a clear solution for the problem becomes available.
David.

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Anton
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Posted: 30 January 2008 at 9:05am \| IP Logged

to espares:
Would you please also provide Application logs for the moment when IIS fails.
And also explain give the settings of your Application pool.

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tomgusa
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Posted: 27 February 2008 at 10:51am \| IP Logged

Hello:

2 weeks before, we installed ISAPI_Rewrite 3,1,0,39.
URL rewrites were working fine.

Since 2 days, we noticed that we are getting 404 errors. It works some times and some times it does not?

Our situation looks very much like davidshq had.
What was the resolution?

Best
Tom

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jobs2web
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Posted: 27 February 2008 at 1:46pm \| IP Logged

We have the same issue with 3 - (Release 3.1.0.39_ specifically)
Here is some data to help troubleshoot -
What happens is sites will run fine for a while - we have a number of sites each running under the same IIS Application Pool.

My FIX - is actually to go into IIS into any one of the sites - Properties - ISAPI_Rewrite Tab - I can see the .htaccess file listed there - Click - Edit - put a space in the file , then remove the space and click 'Apply' and the window where the .htaccess contents is blank, but the rewrite engine works again. Very Strange - and very sparatic.

here is an example from our log file -
1st Entry is from when the site filter is NOT working - the second is when it's correctly rewriting per our rules:

#Fields: date time s-sitename s-ip cs-method cs-uri-stem cs-uri-query s-port cs-username c-ip cs-version cs(User-Agent) cs(Cookie) cs(Referer) cs-host sc-status sc-substatus sc-win32-status sc-bytes cs-bytes time-taken
2008-02-27 19:06:16 W3SVC94566776 192.168.50.243 GET /go/Austin-Jobs/692/ - 80 - 134.129.244.10 HTTP/1.1 Mozilla/5.0+(Windows;+U;+Windows+NT+5.1;+en-US;+rv:1.8.1.12)+Gecko/20080201+Firefox/2.0.0.12 SITEID=21;+USERID=1;+__utma=117985034.1681198144.1188591316.1202944376.1204137973.23;+__utmz=117985034.1201557911.19.13.utmcsr=minnesota-healthcare-jobs.com|utmccn=(referral)|utmcmd=referral|utmcct=%2Fj2w%2Ffind.job;+EMAIL=j2w01%40jobs2web%2Ecom;+__utmb=117985034.11;+__utmc=117985034.11;+hittail_ok=1 http://rackspace.jobs2web.com/ rackspace.jobs2web.com 404 0 0 776 813 203
2008-02-27 19:07:34 W3SVC94566776 192.168.50.243 GET /j2w/find.job job=v.searchbycat&cat=692 80 - 134.129.244.10 HTTP/1.1 Mozilla/5.0+(Windows;+U;+Windows+NT+5.1;+en-US;+rv:1.8.1.12)+Gecko/20080201+Firefox/2.0.0.12 SITEID=21;+USERID=1;+__utma=117985034.1681198144.1188591316.1202944376.1204137973.23;+__utmz=117985034.1201557911.19.13.utmcsr=minnesota-healthcare-jobs.com|utmccn=(referral)|utmcmd=referral|utmcct=%2Fj2w%2Ffind.job;+EMAIL=j2w01%40jobs2web%2Ecom;+__utmb=117985034.14;+__utmc=117985034.14;+hittail_ok=1 - rackspace.jobs2web.com 200 0 0 15848 772 406

Windows Server 2k3 - iis 6

Example From .htaccess file -

# Helicon ISAPI_Rewrite configuration file
# Version 3.1.0.39

RewriteEngine On
RewriteCompatibility2 On
RepeatLimit 200
RewriteBase
# unsupported directive: [ISAPI_Rewrite]

# Defend your computer from some worm attacks
RewriteRule ^.*(?:global.asa|default\.ida|root\.exe|\.\.).*$ . [NC,F,O]
RewriteRule ^/go/[^/]*/(.*)/$ /j2w/find.job?job=v.searchbycat&cat=$1 [NC]
RewriteRule ^/job/[^/]*/(.*)/$ /j2w/find.job?job=main.viewjob&jobid=$1 [NC]
RewriteRule ^/content/(.*)/$ /j2w/find.job?job=vcontent.main&file=$1 [NC]

Also I have duplicate rules in the root httpd.conf file in the C:\Program Files\Helicon\ISAPI_Rewrite3 directory - as I had to add all the rules here originally in order to get everything to work - not sure if this is right or not - but it worked.

I may try upgrading to .41 and see if that helps.

I've also seen this in the error.log file :
[2/27/2008 11:48:50] Begin watch directory changes - FAILED. (d:\websites\jobs2web.com\\find.job\)
[2/27/2008 12:17:05] Begin watch directory changes - FAILED. (d:\websites\jobs2web.com\\find.job\)

Edited by jobs2web - 27 February 2008 at 2:03pm

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Anton
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Posted: 28 February 2008 at 4:44am \| IP Logged

Please try updating to the latest build of ISAPI_Rewrite and provide rewrite logs for non-working requests.

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Anton

mrceolla
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Posted: 23 June 2008 at 11:51am \| IP Logged

jobs2web,

Did you find a solutions to your problems? If so, please share.

Thanks,

Mike

jobs2web
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Posted: 23 June 2008 at 1:15pm \| IP Logged

we upgrade our server version to the latest build - that seemed to fix the intermittent crashing that we were experiencing - see the release notes - but it did mention a fix for 'intermittent crashing'.

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StephenJ
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Posted: 23 June 2008 at 3:49pm \| IP Logged

jobs2web wrote:

see the release notes - but it did mention a fix for 'intermittent crashing'.

Which release notes say this? All I see is an upgrade to boost.

-Stephen

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