INFO 已关闭会话 ID 为 0x15698f5ac360001 (org.apache.zookeeper.server.NIOServerCnxn) 的客户端 /127.0.0.1:48452 的套接字连接

Question

我安装了全新的 zookeeper 和 kafka。我开始了他们两个。然后当我想用这个命令查看主题列表时：

bin/kafka-topics.sh --list --zookeeper localhost 2181

它告诉我套接字连接已关闭。这是屏幕截图：

    darpanshah@darpan-ubuntu:/opt/Kafka$ bin/kafka-topics.sh --list --zookeeper localhost 2181 
2016-08-17 10:44:44,053] INFO Accepted socket connection from /127.0.0.1:48452 (org.apache.zookeeper.server.NIOServerCnxnFactory)
    [2016-08-17 10:44:44,059] INFO Client attempting to establish new session at /127.0.0.1:48452 (org.apache.zookeeper.server.ZooKeeperServer)
    [2016-08-17 10:44:44,069] INFO Established session 0x15698f5ac360001 with negotiated timeout 30000 for client /127.0.0.1:48452 (org.apache.zookeeper.server.ZooKeeperServer)
    [2016-08-17 10:44:44,095] INFO Processed session termination for sessionid: 0x15698f5ac360001 (org.apache.zookeeper.server.PrepRequestProcessor)
    [2016-08-17 10:44:44,105] INFO Closed socket connection for client /127.0.0.1:48452 which had sessionid 0x15698f5ac360001 (org.apache.zookeeper.server.NIOServerCnxn)
    darpanshah@darpan-ubuntu:/opt/Kafka$

提前致谢。卡住了。

Answer 1

这不是错误。主题详细信息是从 Zookeeper 中获取的。因此客户端（由kafka-topics.sh调用）首先连接到Zookeeper，然后建立会话，获取数据，最后断开连接。这是将从 Zookeeper 获取一些数据的任何客户端的预期行为。

INFO 已关闭会话 ID 为 0x15698f5ac360001 (org.apache.zookeeper.server.NIOServerCnxn) 的客户端 /127.0.0.1:48452 的套接字连接

INFO Closed socket connection for client /127.0.0.1:48452 which had sessionid 0x15698f5ac360001 (org.apache.zookeeper.server.NIOServerCnxn)

apache-kafka

apache-zookeeper

kafka-consumer-api

kafka-producer-api