if (this.internalAddress != UNKNOWN_NODE_ADDRESS )
if (this.internalAddress != UNKNOWN_NODE_ADDRESS && this.internalAddress != internalAddress)
	public void setInternalAddress(long internalAddress) {        if (this.internalAddress != UNKNOWN_NODE_ADDRESS /*&& this.internalAddress != internalAddress*/)            throw new IllegalArgumentException("Internal address already affected");        		this.internalAddress = internalAddress;	}