Hi, Please check in Logs whether any java.net.BindException: Address already in use is arrived, If it is seen  It clearly resembles that port is already in use,  (i.e) something is trying to connect to the port and is blocking which we are not sure. Possible causes Maybe  1. Some "port scanner" or something is blocking this port (or) Some other Service is running on the port like a port scanner. 2. The accumulator is still running on those ports from an earlier run 3. Several Services may be running on this port.   Please make sure what services (or) applications is running on this port and try to stop it.         ... View more