Class NetworkAddress

  • @Internal
    public class NetworkAddress
    extends Object
    A convenient wrapper class around network primitives in Java. IMPORTANT: DO NOT USE THIS CLASS IF YOU DO NOT KNOW ABSOLUTELY WHAT YOU ARE DOING. This class has only been brought forward from SDK 2 because we need compatibility for the Sdk2CompatibleMemcachedHashingStrategy. Please refrain from using it, since it has lots of drawbacks, mostly around Reverse DNS resolving. How IPv6 is handled: If a hostname is passed in as input instead of a literal IP address, then the class relies on InetAddress.getAllByName(String) to perform a lookup. By default the JVM prefers IPv4 for this lookup in dual stack environments, unless the system property "" is set to true on startup. In this case, IPv6 is preferred and automatically selected. Note that there is one specific case where if IPv6 is preferred in dual stack and you are running Couchbase Server pre 5.1 which does not support IPv6, then you must set the system property "com.couchbase.forceIPv4" to true so that the firstly returned IPv6 address is ignored and we are looking for an IPv4 address to be resolved as well. Obviously, in a single IPv6 stack environment working with older Couchbase Server releases won't work.
    Michael Nitschinger
    • Field Detail


        public static final boolean ALLOW_REVERSE_DNS
        Flag which controls the usage of reverse dns
      • FORCE_IPV4

        public static final boolean FORCE_IPV4
        Flag which controls if even if ipv6 is present, IPv4 should be preferred.