Examples of NIOServerCnxnFactory

org.apache.zookeeper.server.NIOServerCnxnFactory

NIOServerCnxnFactory implements a multi-threaded ServerCnxnFactory using NIO non-blocking socket calls. Communication between threads is handled via queues. - 1 accept thread, which accepts new connections and assigns to a selector thread - 1-N selector threads, each of which selects on 1/N of the connections. The reason the factory supports more than one selector thread is that with large numbers of connections, select() itself can become a performance bottleneck. - 0-M socket I/O worker threads, which perform basic socket reads and writes. If configured with 0 worker threads, the selector threads do the socket I/O directly. - 1 connection expiration thread, which closes idle connections; this is necessary to expire connections on which no session is established. Typical (default) thread counts are: on a 32 core machine, 1 accept thread, 1 connection expiration thread, 4 selector threads, and 64 worker threads.

    if (!started || activeZKServerIndex < 0 ) {
      return -1;
    }


    // Shutdown the current active one
    NIOServerCnxnFactory standaloneServerFactory =
      standaloneServerFactoryList.get(activeZKServerIndex);
    int clientPort = clientPortList.get(activeZKServerIndex);


    standaloneServerFactory.shutdown();
    if (!waitForServerDown(clientPort, CONNECTION_TIMEOUT)) {
      throw new IOException("Waiting for shutdown of standalone server");
    }


    zooKeeperServers.get(activeZKServerIndex).getZKDatabase().close();

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Examples of NIOServerCnxnFactory

Examples of org.apache.zookeeper.server.NIOServerCnxnFactory