Unable to start DomainDaemon on port 55555

We are trying to upgrade RDF from 13.2.2.33 to 13.2.3.55. DomainDaemon was listening on port 55555 before. We upgraded RPAS and RDF and now trying to start the DomainDaemon on port 55555 but getting the following error:

However, we are able to start the DomainDaemon on other port like 55556. Any solution to resolve this issues?

Error:

oretail@chorsd15:/applic/mmhome/app/oretail> DomainDaemon -port 55555 -start -loglevel all

<D 2015Dec29 21:54:09.106>

<D 2015Dec29 21:54:09.106>

<D 2015Dec29 21:54:09.106> Current file descriptor limit is 8192.

<D 2015Dec29 21:54:09.107>

<D 2015Dec29 21:54:09.107>

<D 2015Dec29 21:54:09.107> Current file descriptor limit is 8192.

<D 2015Dec29 21:54:09.108> SocketServer::close(3);.

<D 2015Dec29 21:54:09.108> socket 3 failed; cannot use the specified port '55555' (Unix's errno 226; Address already in use)