I've found all JMXEnabledThreadPool and JMXConfigurableThreadPool are constructed with LinkedBlockingQueue as workQueue, and the LBQs are constructed by the default constructor. It means the queue has Integer.MAX_VALUE capacity. In other words, any tasks won't be rejected (Dropped) before we would have Integer.MAX_VALUE=2Billion "Pending" tasks. And even if a task is rejected, DebuggableTheadPool will retry to queue it again in 1000ms interval forever. So, once a runnable task is executed by one of these ThreadPoolExecutor sub classes, it will not be removed nor canceled without the completion (or OOM).
Would you confirm my understanding is correct? regards, maki
