Concurrent Readers metric not getting reset

Products

• CA Application Performance Management (APM / Wily / Introscope)

Issue/Introduction

"Concurrent Readers" metric continue to increase and not being reset till you restart the application. 

Resolution

The continuously increasing "Concurrent Readers" metric value from this particular application, it could be indicating a potential performance issue with multiple threads attempting IO read concurrently on the same socket since the IO read count appeared not able to decrement accordingly after each socket IO read operation due to possibly some improperly handled exceptions and/or race conditions.  Please check with the application development team if this particular application would have concurrent socket read implementations and if these implementation are be thread-safe.