ClientCnxn.java 文件源码

private void startConnect() throws IOException {
    state = States.CONNECTING;

    InetSocketAddress addr;
    if (rwServerAddress != null) {
        addr = rwServerAddress;
        rwServerAddress = null;
    } else {
        addr = hostProvider.next(1000);
    }

    setName(getName().replaceAll("\\(.*\\)",
            "(" + addr.getHostName() + ":" + addr.getPort() + ")"));
    if (ZooKeeperSaslClient.isEnabled()) {
        try {
            String principalUserName = System.getProperty(
                    ZK_SASL_CLIENT_USERNAME, "zookeeper");
            zooKeeperSaslClient =
                new ZooKeeperSaslClient(
                        principalUserName+"/"+addr.getHostName());
        } catch (LoginException e) {
            // An authentication error occurred when the SASL client tried to initialize:
            // for Kerberos this means that the client failed to authenticate with the KDC.
            // This is different from an authentication error that occurs during communication
            // with the Zookeeper server, which is handled below.
            LOG.warn("SASL configuration failed: " + e + " Will continue connection to Zookeeper server without "
              + "SASL authentication, if Zookeeper server allows it.");
            eventThread.queueEvent(new WatchedEvent(
              Watcher.Event.EventType.None,
              Watcher.Event.KeeperState.AuthFailed, null));
            saslLoginFailed = true;
        }
    }
    logStartConnect(addr);

    clientCnxnSocket.connect(addr);
}