Any caller that attempted to pass a task to a pool thread would find the pool empty, and its thread would block while it waited for an available pool thread.
试图向池线程传递任务的调用者都会发现池为空，在调用者等待一个可用的池线程时，它的线程将阻塞。
2
A block is allocated from the free pool by first converting the requested bytes to an index in the bucket array, using the following equation.
当从空闲池分配块时，首先使用以下公式把请求的字节数转换为bucket数组索引。
3
In case of an exception, the catch block simply called the exception publisher, then returned the executing thread back to the thread pool.