java - 无法连接到本地主机上的 Zookeeper :2181

Question

我的应用程序正在尝试连接到 Zookeeper @ localhost:2181。 Zookeeper 正在运行并在命令提示符下进行检查。但是，当应用程序运行时，我反复看到以下异常:

2018-08-06 22:25:09 DEBUG ZkClient:919 - Closing ZkClient...
2018-08-06 22:25:09 INFO  ZkEventThread:82 - Terminate ZkClient event thread.
2018-08-06 22:25:09 DEBUG ZkConnection:77 - Closing ZooKeeper connected to localhost:2181
2018-08-06 22:25:09 DEBUG ZooKeeper:673 - Closing session: 0x0
2018-08-06 22:25:09 DEBUG ClientCnxn:1306 - Closing client for session: 0x0
2018-08-06 22:25:10 INFO  ClientCnxn:975 - Opening socket connection to server localhost.localdomain/127.0.0.1:2181. Will not attempt to authenticate using SASL (unknown error)
2018-08-06 22:25:10 DEBUG ClientCnxn:1086 - An exception was thrown while closing send thread for session 0x0 : Connection refused
2018-08-06 22:25:10 DEBUG ClientCnxnSocketNIO:203 - Ignoring exception during shutdown input
java.nio.channels.ClosedChannelException
        at sun.nio.ch.SocketChannelImpl.shutdownInput(SocketChannelImpl.java:780)
        at sun.nio.ch.SocketAdaptor.shutdownInput(SocketAdaptor.java:399)
        at org.apache.zookeeper.ClientCnxnSocketNIO.cleanup(ClientCnxnSocketNIO.java:200)
        at org.apache.zookeeper.ClientCnxn$SendThread.cleanup(ClientCnxn.java:1185)
        at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1122)
2018-08-06 22:25:10 DEBUG ClientCnxnSocketNIO:210 - Ignoring exception during shutdown output
java.nio.channels.ClosedChannelException
        at sun.nio.ch.SocketChannelImpl.shutdownOutput(SocketChannelImpl.java:797)
        at sun.nio.ch.SocketAdaptor.shutdownOutput(SocketAdaptor.java:407)
        at org.apache.zookeeper.ClientCnxnSocketNIO.cleanup(ClientCnxnSocketNIO.java:207)
        at org.apache.zookeeper.ClientCnxn$SendThread.cleanup(ClientCnxn.java:1185)
        at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1122)
2018-08-06 22:25:10 DEBUG ClientCnxn:1290 - Disconnecting client for session: 0x0
2018-08-06 22:25:10 INFO  ZooKeeper:684 - Session: 0x0 closed
2018-08-06 22:25:10 DEBUG ZkClient:932 - Closing ZkClient...done
2018-08-06 22:25:10 INFO  ClientCnxn:512 - EventThread shut down

而且，在日志中，它说

ClientCnxn:975 - Opening socket connection to server localhost.localdomain/127.0.0.1:2181. Will not attempt to authenticate using SASL (unknown error)

这意味着它是否正在尝试连接 localhost.localdomain？

请帮我解决。

Answer 1

我也有类似的问题。我在zoo.cfg(C:\kafka_folder\zookeeper-3.5.4\conf)中配置了以下参数，错误消失了。

admin.enableServer=true
admin.serverPort=9990

或者 试试这个 ZkClient zkClient = new ZkClient("localhost:9091", 5000, 5000, ZKStringSerializer$.MODULE$);

人们也会在kafka-unit或kafka-junit(集成测试)中遇到此错误。在这种情况下，您必须使用kafka-client依赖版本1.0.2(其他版本不支持kafka-unit或kafka-junit)。

 <dependency>
            <groupId>org.apache.kafka</groupId>
            <artifactId>kafka-clients</artifactId>
            <version>1.0.2</version>
            <scope>provided</scope>
        </dependency>