Mutex Lock Issues under High Load

[Oliver Castle]

Hello

We are currently developing a Lucene.Net search for one of our products 
and we are very happy with results apart from when we we load test the 
application at high loads and the application starts the throw errors 
returning that the lucene index still has a lock from another IIS thread 
on it. Do we have to implement locking between IIS threads so only one 
IIS request at a time can read the index or are we doing something wrong 
in the code?

Any suggestions great fully received.

Ollie Castle