I have a website running on Windows Server 2003 Web Edition, that has suddenly in the last few days started freezing and giving users a "503 Service Unavailable" message.

There's a bunch of errors showing up in the event log, but the most interesting one is:

 **Log Name: System Source: Microsoft-Windows-WAS Date: 22/08/2011 12:11:16 Event ID: 5146 Task Category: None Level: Error Keywords: Classic User: N/A Computer: myserver.mydomain.com Description: Application pool www.mysite.com has been disabled. The request from protocol http to create the application pool failed. Restart the application pool so that Windows Process Activation Service (WAS) can determine the correct state of the protocol. The data field contains the error number. Event Xml: <Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event"> <System> <Provider Name="Microsoft-Windows-WAS" Guid="{524B5D04-133C-4A62-8362-64E8EDB9CE40}" EventSourceName="WAS" /> <EventID Qualifiers="49152">5146</EventID> <Version>0</Version> <Level>2</Level> <Task>0</Task> <Opcode>0</Opcode> <Keywords>0x80000000000000</Keywords> <TimeCreated SystemTime="2011-08-22T11:11:16.000Z" /> <EventRecordID>37</EventRecordID> <Correlation /> <Execution ProcessID="0" ThreadID="0" /> <Channel>System</Channel> <Computer>myserver.mydomain.com</Computer> <Security /> </System> <EventData> <Data Name="AppPoolID">www.mysite.com</Data> <Data Name="ProtocolID">http</Data> <Binary>B7000780</Binary> </EventData> </Event> 

A server reboot fixes the problem temporarily - for ca. 24 hours - after which we start seeing 503 error messages again. There's nothing much to go on in the IIS event logs; restarting the application pool doesn't fix it, neither does an iisreset.

Any ideas?

Thanks

-D-

I have a website running on Windows Server 2008 Web Edition, that has suddenly in the last few days started freezing and giving users a "503 Service Unavailable" message.

There's a bunch of errors showing up in the event log, but the most interesting one is:

 **Log Name: System Source: Microsoft-Windows-WAS Date: 22/08/2011 12:11:16 Event ID: 5146 Task Category: None Level: Error Keywords: Classic User: N/A Computer: myserver.mydomain.com Description: Application pool www.mysite.com has been disabled. The request from protocol http to create the application pool failed. Restart the application pool so that Windows Process Activation Service (WAS) can determine the correct state of the protocol. The data field contains the error number. Event Xml: <Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event"> <System> <Provider Name="Microsoft-Windows-WAS" Guid="{524B5D04-133C-4A62-8362-64E8EDB9CE40}" EventSourceName="WAS" /> <EventID Qualifiers="49152">5146</EventID> <Version>0</Version> <Level>2</Level> <Task>0</Task> <Opcode>0</Opcode> <Keywords>0x80000000000000</Keywords> <TimeCreated SystemTime="2011-08-22T11:11:16.000Z" /> <EventRecordID>37</EventRecordID> <Correlation /> <Execution ProcessID="0" ThreadID="0" /> <Channel>System</Channel> <Computer>myserver.mydomain.com</Computer> <Security /> </System> <EventData> <Data Name="AppPoolID">www.mysite.com</Data> <Data Name="ProtocolID">http</Data> <Binary>B7000780</Binary> </EventData> </Event> 

A server reboot fixes the problem temporarily - for ca. 24 hours - after which we start seeing 503 error messages again. There's nothing much to go on in the IIS event logs; restarting the application pool doesn't fix it, neither does an iisreset.

EDIT: The site is now failing immediately, and we still have no idea what's causing it.

Any ideas?

Thanks

-D-