NoSQL Database

Hello,
I want to deploy two SNs on one machine, and I chose different port(5030,5031), when I run "runadmin", the exceptions happened.

[sunyao@datanode1:~/oracle_nosql/tools]$ jps -m
25392 Jps -m
25145 kvstore-1.2.123.jar start -root KVROOT_2
23099 kvstore-1.2.123.jar start -root KVROOT
23265 ManagedService -root KVROOT/mystore/sn2 -store mystore -class RepNode -service rg1-rn2
25220 ManagedService -root KVROOT_2/mystore2/sn1 -store mystore2 -class Admin -service admin1
[sunyao@datanode1:~/oracle_nosql/tools]$ java -jar kv-1.2.123/lib/kvstore-1.2.123.jar ping -port 5030 -host datanode1
SNA at hostname: datanode1 registry port: 5030 has no available Admins or RNs registered.
[sunyao@datanode1:~/oracle_nosql/tools]$ java -jar kv-1.2.123/lib/kvstore-1.2.123.jar runadmin -port 5030 -host datanode1
Exception in thread "main" java.rmi.NotBoundException: commandService
at sun.rmi.registry.RegistryImpl.lookup(RegistryImpl.java:106)
at sun.rmi.registry.RegistryImpl_Skel.dispatch(Unknown Source)
at sun.rmi.server.UnicastServerRef.oldDispatch(UnicastServerRef.java:386)
at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:250)
at sun.rmi.transport.Transport$1.run(Transport.java:159)
at java.security.AccessController.doPrivileged(Native Method)
at sun.rmi.transport.Transport.serviceCall(Transport.java:155)
at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:535)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:790)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:649)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:662)
at sun.rmi.transport.StreamRemoteCall.exceptionReceivedFromServer(StreamRemoteCall.java:255)
at sun.rmi.transport.StreamRemoteCall.executeCall(StreamRemoteCall.java:233)
at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:359)
at sun.rmi.registry.RegistryImpl_Stub.lookup(Unknown Source)
at oracle.kv.impl.util.registry.RegistryUtils.getAdmin(RegistryUtils.java:197)
at oracle.kv.impl.admin.client.KVAdmin.connect(KVAdmin.java:883)
at oracle.kv.impl.admin.client.KVAdmin.main(KVAdmin.java:2131)
at oracle.kv.impl.util.KVStoreMain$6.run(KVStoreMain.java:188)
at oracle.kv.impl.util.KVStoreMain.main(KVStoreMain.java:319)