Nexus OSS 2.15.1-02 / enabling JMX generate a Port already in use: 1099

Hi Community,

when running version 2.14.11-01 we were using jmx
we upgraded to version nexus-2.15.1-02 enabling jmx following https://support.sonatype.com/hc/en-us/articles/213465498 end on nexus startup issue with the following error in wrapper.log:
jvm 1 | Caused by: java.rmi.server.ExportException: Port already in use: 1099; nested exception is:
jvm 1 | java.net.BindException: Address already in use (Bind failed)
jvm 1 | at sun.rmi.transport.tcp.TCPTransport.listen(TCPTransport.java:346)
jvm 1 | at sun.rmi.transport.tcp.TCPTransport.exportObject(TCPTransport.java:254)
jvm 1 | at sun.rmi.transport.tcp.TCPEndpoint.exportObject(TCPEndpoint.java:412)
jvm 1 | at sun.rmi.transport.LiveRef.exportObject(LiveRef.java:147)
jvm 1 | at sun.rmi.server.UnicastServerRef.exportObject(UnicastServerRef.java:237)
jvm 1 | at java.rmi.server.UnicastRemoteObject.exportObject(UnicastRemoteObject.java:383)
jvm 1 | at java.rmi.server.UnicastRemoteObject.exportObject(UnicastRemoteObject.java:346)
jvm 1 | at javax.management.remote.rmi.RMIJRMPServerImpl.export(RMIJRMPServerImpl.java:148)
jvm 1 | at javax.management.remote.rmi.RMIJRMPServerImpl.export(RMIJRMPServerImpl.java:124)
jvm 1 | at javax.management.remote.rmi.RMIConnectorServer.start(RMIConnectorServer.java:404)
jvm 1 | at org.eclipse.jetty.jmx.ConnectorServer.doStart(ConnectorServer.java:152)
jvm 1 | at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:73)
jvm 1 | … 22 common frames omitted

no other program is using port 1099.
watching a netstat while starting nexus, one listener on port 1099 appear for few seconds then disappear when nexus fails and stop.

Commenting:

  <!-- create the RMIRegistry -->
  <Call name="createRegistry" class="java.rmi.registry.LocateRegistry">
    <Arg type="java.lang.Integer"><Property name="jmx-port" default="1099" /></Arg>
    <Call name="sleep" class="java.lang.Thread">
      <Arg type="java.lang.Integer">1000</Arg>
    </Call>
  </Call>

in nexus-2.15.1-02/conf/jetty-jmx.xml
did the trick