The source is clearly different, with the brew version clearly missing two changes. This is a source tree older than 1.3.4 to be sure: | [starksm@succubus oswego-concurrent]$ diff -w 1.3.4/lib/src/EDU/oswego/cs/dl/util/concurrent/PooledExecutor.java 1.3.4-brew/src/concurrent/PooledExecutor.java | 30,31d29 | < 30aug2003 dl check for new tasks when timing out | < 18feb2004 dl replace dead thread if no others left | 190,193c188 | < * <dd> Wait until a thread becomes available. This | < * policy should, in general, not be used if the minimum number of | < * of threads is zero, in which case a thread may never become | < * available. | --- | > * <dd> Wait until a thread becomes available. | 298c293 | < * <li> Same as (2) except clients abort if both the buffer is full and | --- | > * <li> Same as (2) except clients block if both the buffer is full and | 304c299 | < * pool.abortWhenBlocked(); | --- | > * pool.waitWhenBlocked(); | 699,709d693 | < | < // Create a replacement if needed | < if (poolSize_ == 0 || poolSize_ < minimumPoolSize_) { | < try { | < Runnable r = (Runnable)(handOff_.poll(0)); | < if (r != null && !shutdown_) // just consume task if shut down | < addThread(r); | < } catch(InterruptedException ie) { | < return; | < } | < } | 794,797d777 | < synchronized(PooledExecutor.this) { | < if (shutdown_) | < return true; | < } | 805,806c785 | < * is available, unless the pool has been shut down, in which case | < * the action is discarded. | --- | > * is available. | View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4031157#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...