Hi,
On our Windows 2003 SP2, IIS 6 web server every couple of months or so we seem to get an error where it stops serving sites completely.
Last one happened on Saturday - Google Chrome gave the error : "Error 101 (net::ERR_CONNECTION_RESET): Unknown error" , IE7 just said it could not get the site.
There are about a dozen websites served from the box - most with their own application pools. Mostly ASP.Net (C#), some simple html but they ALL go down. Usually the application pools recycle themselves fairly well, and this issue happens very little.
Thing is - I can't seem to trace any errors and other services work.
- <div mce_keep="true">No IIS log errors</div>
- <div mce_keep="true">No Server Event logs that look appropriate (Application / Security / System / Web apps own source)</div>
- <div mce_keep="true">iisreset /resart does NOT fix the issue !</div>
- <div mce_keep="true">Restarting World Wide Web Publishing Services / IIS admin services does NOT fix the issue</div>
- <div mce_keep="true">Server pings Ok</div>
- <div mce_keep="true">Server connects on Remote Desktop Ok</div>
Only thing I've found to fix it as yet is to restart the server.
Due to the nature of the problem i.e. a dozen or so live sites going down I obviously don't want to hang about investigating possiblities blindly, so wondered if anybody had ideas on what it could be and how I could investigate if/when it next happens.
Have seen similar issues in the forum mentioned before but no one obvious conclusion. Plus they usually only mention 1 site.
In one someone mentioned
"You have too many connections open to the server. The limit for the OS is around 4000? Change the appropriate registry settings and reboot."
Without qualifying this. Surley this would give an IIS standard "Service Unavailable" message instead ? How do I check number of open connections ?
I realise this may well be more a server/windows/network issue - but thought I might as well start somewhere.
TIA