Using web-console, look at jboss.system:service=ThreadPool The attributes metrics: QueueSize 0 BlockingMode Run MinPoolSize 10 MaxPoolSize 10 MaxQueueSize 1000 Then look at jboss.system:type=ServerInfo ActiveThreadCount 141 The size of ThreadPool is 10. Why are there 141 threads active? View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4235612#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...