FDS-106

JVM Memory Leak With Attached Language Debuggers

Sun identified a fault with their JVM product (on which most CFML engines run) which can cause memory to leak when a language debugger is attached and access the target machine in a certain (well-documented and Sun-approved) way.

Sun are tracking this issue under bug ID 4858370 here:

http://bugs.sun.com/view_bug.do?bug_id=4858370

Symptoms

During a long debugging session, you may find that the target JVM memory usage increases by a small amount, which is never reclaimed by Java. Under tests, FusionDebug was shown to have a minimal drain on memory due to this issue.

Fix

Since this is a known issue with the JVM, a Sun Microsystems product, it will be solved in a future JVM release. Customers should generally not experience this issue except when performing extremely long debugging sessions. Memory is reclaimed normally if the JVM is restarted.