public static ServerName valueOf(final String hostAndPort, final long startCode) {
    return INTERN_POOL.intern(new ServerName(hostAndPort, startCode));
  }
Retrieve an instance of ServerName. Callers should use the equals method to compare returned
instances, though we may return a shared immutable object as an internal optimization.
hbase-common/src/main/java/org/apache/hadoop/hbase/ServerName.java