Hi,



unfortunately adding memory does not solve the problem. 



It does not seem to be heap related ... I jstacked after 56 slaves, after 500 adding and removing (also waited for the disconnect messages) slaves and after the next 500 I received the Exception.



And the number of threads did not reduce after waiting.



I attached the thread dumps.



It's the slaveMonitor ... who does not receive an interrupt?



 public boolean waitOnMonitor(Object monitor)

        {

        try

            {

            monitor.wait();

            }

        catch (InterruptedException e) { return false; }

        return true;

        }



Greetings,



	Ralf