Hello All,

My client is running IIS 5 on Win 2000 machine with Symantec corp. edition 10 clients installed on it. My web application uses SQL server as database and TCP sockets to interface with some other system and logs the connection establishment and exceptions in text files.

The issue is that socket connection drops when antivirus scan is executed without any formal termination message in log files. Connection should not have been dropped in the first place.

Moreover I create another debug log file and observed that when connection is dropped because of scanning and message is sent through socket in this state, the exception raised is that connection log file is currently being used by some other process.

On development machine I have antivirus corp. edition 9.0 installed. I produced this error internally by manually scanning IIS but I noticed that socket connection did establish on next request as it has been programmed to keep on attempting retries on disconnection. But the point is that connection should not have been dropped. Why antivirus is interfering with a running application?

Another strange thing:

By using the exclusion option on web application files I managed to overcome the error on development machine. The connection did drop but restored on next request. On live machine the solution worked for manual scan but failed for server initiated scan.

The only difference seems is Symantec 10 installed on live whereas Symantec 9 on development machine.

Is this a Symantec issue or IIS issue? How to resolve it? The application is a product and installed on a number of clients having other antivirus software or Symantec editions other than 10.0. I have been using 9 myself and no problems have been ever faced.

Any help will be appreciated.

Regards,

Bilal