Webservice becomes unresponsive

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Hi,

I have a problem accessing a web service.

The problem consists in that after a couple of hours (approx. 3 hours) the
web service is non-responsive.
I have then tried accessing it through Internet Explorer and when I invoke a
method exposed by the web service I recieve
a "FileNotFound"-exception referring to a specific DLL in c:\windows\temp
(the filename of the DLL is always different every time I recieve the
exception).

If I restart the IIS (through a command prompt I issue the command
"iisreset") then the web service is functioning again.

I tried searching for this error on Google and every item I found on this
issue refers to the issue as a security problem.
(User does not have enoungh permissions for c:\windows\temp).
But I checked this and permissions are fine (I have tried with modify and
full permissions for the user running the web service).
Moreover, I tried adding the user running the web service to the
Administrators-group and the problem still occurs.

My setup is as follows:
- Windows 2003 Server Service pack 1
- IIS 6.0
- Created new application pool called WS_Pool (checked "use existing as
template" during creation
- Identity of WS_Pool is user "WebServiceUser" which is member of "IIS_WPG"
- My WebService is installed below "Default Web Site". Settings for Web
Site is:
x Connection timeout = 0
x HTTP Keep-Alives unchecked
x Authentication and Access Control: Enable anonymous access
(WebServiceUser is specified as identity when anonymous connections are made)
x Configuration options: "Enable session state" unchecked, "Enable
buffering" unchecked
- ASP.NET:
x Version: 2.X
x State Management Configuration: "Session State Mode" set to "Off"
- Permissions on directories:
x Directory “c:\Windows\temp� WebServiceUser: “modify� permissions
x Directory “c:\Windows\temp� Network Service: “modify� permissions
x Directory “c:\Windows\temp� IIS_WPG: “modify� permissions
- Web service is being accessed every 5 seconds from a client application
on another computer
Does anyone know why I keep getting the exception?

Thank you in advance.

Jess

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Hi,

I have a problem accessing a web service.

The problem consists in that after a couple of hours (approx. 3 hours)
the web service is non-responsive.
I have then tried accessing it through Internet Explorer and when I
invoke a method exposed by the web service I recieve
a "FileNotFound"-exception referring to a specific DLL in
c:\windows\temp (the filename of the DLL is always different every
time I recieve the exception).

If I restart the IIS (through a command prompt I issue the command
"iisreset") then the web service is functioning again.

I tried searching for this error on Google and every item I found on
this issue refers to the issue as a security problem.
(User does not have enoungh permissions for c:\windows\temp).
But I checked this and permissions are fine (I have tried with modify
and full permissions for the user running the web service).
Moreover, I tried adding the user running the web service to the
Administrators-group and the problem still occurs.

I recall having a similar issue ... I believe you need to give IIS
(IUSR/IWAM/ASPNET/Network Service) full access to the temp dir? I
believe it creates files in there - and when it can't you get these
strange errors.