Problem

One node will start but the second node is getting an error joining the cluster.

The main node sees the following error in the CN logs

ERROR [ClusterConnectionAcceptor: /10.201.36.103:54241] (AcceptorThread) - Error accepting connection
javax.net.ssl.SSLHandshakeException: Received fatal alert: certificate_unknown
	at sun.security.ssl.Alert.createSSLException(Alert.java:131) ~[?:?]
	at sun.security.ssl.Alert.createSSLException(Alert.java:117) ~[?:?]
	at sun.security.ssl.TransportContext.fatal(TransportContext.java:336) ~[?:?]
	at sun.security.ssl.Alert$AlertConsumer.consume(Alert.java:293) ~[?:?]
	at sun.security.ssl.TransportContext.dispatch(TransportContext.java:185) ~[?:?]
	at sun.security.ssl.SSLTransport.decode(SSLTransport.java:172) ~[?:?]
	at sun.security.ssl.SSLSocketImpl.decode(SSLSocketImpl.java:1426) ~[?:?]
	at sun.security.ssl.SSLSocketImpl.readHandshakeRecord(SSLSocketImpl.java:1336) ~[?:?]
	at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:450) ~[?:?]
	at sun.security.ssl.SSLSocketImpl.ensureNegotiated(SSLSocketImpl.java:841) ~[?:?]
	at sun.security.ssl.SSLSocketImpl$AppInputStream.read(SSLSocketImpl.java:932) ~[?:?]
	at java.io.ObjectInputStream$PeekInputStream.read(ObjectInputStream.java:2854) ~[?:?]
	at java.io.ObjectInputStream$PeekInputStream.readFully(ObjectInputStream.java:2870) ~[?:?]
	at java.io.ObjectInputStream$BlockDataInputStream.readShort(ObjectInputStream.java:3367) ~[?:?]
	at java.io.ObjectInputStream.readStreamHeader(ObjectInputStream.java:936) ~[?:?]
	at java.io.ObjectInputStream.<init>(ObjectInputStream.java:379) ~[?:?]
	at com.axway.defence.validation.ValidatingObjectInputStream.<init>(ValidatingObjectInputStream.java:82) ~[axway-defence-2.8.4.jar:2.8.4]
	at com.axway.cluster.bus.connection.ConnectionHandshake.acceptConnection(ConnectionHandshake.java:49) ~[interchange-framework-acf-node.jar:26.6.0-13]
	at com.axway.cluster.bus.connection.AcceptorThread$SocketHandlerThread.run(AcceptorThread.java:172) [interchange-framework-acf-node.jar:26.6.0-13]

Resolution

Stop all B2bi nodes

Go to shared/common/conf/acfSecurity

backup and remove all the files in the directory

Start B2bi one at a time and confirm you are no longer seeing the error.