I'm running into an issue where threads will stop responding to breakpoints and will eventually get stuck, making no further progress in "RUNNING" mode, when running under the Intellij debugger.
Memory (heap/permgen) look fine, CPU is fine.
Technologies involved are Windows XP, JDK 1.6/1.7, Intellij 11.1.2, Scala Plugin 0.5.808, Scala 2.9.1, Spring 3.0.7, Hibernate 3.6.5 (JPA/Entity Manager).
Another symptom is that another thread (that runs on a timer task) which runs fine will hang when a breakpoint is set on the code that it runs. The thread dump then says "breakpoint" instead of running, but the debugger UI does not show the app stopped at a breakpoint.