MultithreadedTestCase (MTC) is an open-source testing framework which supports the writing of multithreaded test cases. It introduces a global tick-counter which provides a deterministic form of thread synchronization, based on the number of times all threads in a test case are blocked. The tool works well ina debugger, unlike other approximate forms of synchronization (e.g. sleep())

This issue concerns using MTC in order to simplify and improve test cases in the JGroups test suite in which concurrency and blocking are at issue.