Accessing the port 5701 creates Hazelcast errors

$ curl -X GET -d "invalid-data" http://localhost:5701                                                                                                                                                           14:34:13 
CCCcom.atlassian.stash.internal.cluster.SharedHomeAndDatabaseJoinCheck###cluster-join8989016958290866695.txt$$$Node is part of an unrelated cluster%       

2014-11-24 WARN  [hz.hazelcast.IO.thread-Acceptor]  com.hazelcast.nio.tcp.SocketAcceptor [172.22.2.84]:5701 [pepoirot] [3.3.2-atlassian-3] java.lang.IllegalArgumentException: Undefined id 541611092
java.lang.IllegalArgumentException: Undefined id 541611092
	at com.atlassian.stash.internal.cluster.ClusterJoinCheckAction.forId(ClusterJoinCheckAction.java:52) ~[ClusterJoinCheckAction.class:na]
	at com.atlassian.stash.internal.cluster.DefaultClusterJoinManager.negotiateOutcome(DefaultClusterJoinManager.java:175) ~[DefaultClusterJoinManager.class:na]
	at com.atlassian.stash.internal.cluster.DefaultClusterJoinManager.accept(DefaultClusterJoinManager.java:93) ~[DefaultClusterJoinManager.class:na]
	at com.atlassian.stash.internal.hazelcast.ClusterJoinSocketInterceptor.onAccept(ClusterJoinSocketInterceptor.java:44) ~[ClusterJoinSocketInterceptor.class:na]
	at com.hazelcast.nio.tcp.TcpIpConnectionManager.interceptSocket(TcpIpConnectionManager.java:153) ~[TcpIpConnectionManager.class:3.3.2-atlassian-3]
	at com.hazelcast.nio.tcp.SocketAcceptor.configureAndAssignSocket(SocketAcceptor.java:142) [SocketAcceptor.class:3.3.2-atlassian-3]
	at com.hazelcast.nio.tcp.SocketAcceptor.acceptSocket(SocketAcceptor.java:128) [SocketAcceptor.class:3.3.2-atlassian-3]
	at com.hazelcast.nio.tcp.SocketAcceptor.run(SocketAcceptor.java:70) [SocketAcceptor.class:3.3.2-atlassian-3]
	at java.lang.Thread.run(Thread.java:745) [na:1.7.0_67]
	... 20 frames trimmed