ZooKeeper使用实践踩坑总结

╰半夏微凉° 2023-06-02 10:38 233阅读 0赞

## **【1】地址占用** ##

异常如下所示：

org.apache.zookeeper.server.admin.AdminServer$AdminServerException: Problem starting AdminServer on address 0.0.0.0, port 8080 and command URL /commands
            at org.apache.zookeeper.server.admin.JettyAdminServer.start(JettyAdminServer.java:107)
            at org.apache.zookeeper.server.ZooKeeperServerMain.runFromConfig(ZooKeeperServerMain.java:138)
            at org.apache.zookeeper.server.ZooKeeperServerMain.initializeAndRun(ZooKeeperServerMain.java:106)
            at org.apache.zookeeper.server.ZooKeeperServerMain.main(ZooKeeperServerMain.java:64)
            at org.apache.zookeeper.server.quorum.QuorumPeerMain.initializeAndRun(QuorumPeerMain.java:128)
            at org.apache.zookeeper.server.quorum.QuorumPeerMain.main(QuorumPeerMain.java:82)
    Caused by: java.io.IOException: Failed to bind to /0.0.0.0:8080
            at org.eclipse.jetty.server.ServerConnector.openAcceptChannel(ServerConnector.java:346)
            at org.eclipse.jetty.server.ServerConnector.open(ServerConnector.java:308)
            at org.eclipse.jetty.server.AbstractNetworkConnector.doStart(AbstractNetworkConnector.java:80)
            at org.eclipse.jetty.server.ServerConnector.doStart(ServerConnector.java:236)
            at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68)
            at org.eclipse.jetty.server.Server.doStart(Server.java:396)
            at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68)
            at org.apache.zookeeper.server.admin.JettyAdminServer.start(JettyAdminServer.java:103)
            ... 5 more
    Caused by: java.net.BindException: 地址已在使用
            at sun.nio.ch.Net.bind0(Native Method)
            at sun.nio.ch.Net.bind(Net.java:433)
            at sun.nio.ch.Net.bind(Net.java:425)
            at sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:223)
            at sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:74)
            at org.eclipse.jetty.server.ServerConnector.openAcceptChannel(ServerConnector.java:342)
            ... 12 more

AdminServer端口默认使用8080，上面异常表示8080端口已经被使用。两种解决办法：[解决端口占用][Link 1]或者更换管理端口。

更换端口如下所示：

admin.serverPort=18080

或者可以选择停掉这个服务，在启动脚本中增加`-Dzookeeper.admin.enableServer=false`

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## **【2】找不到或无法加载主类 org.apache.zookeeper.server.quorum.QuorumPeerMain** ##

如果你使用的是3.5.5版本，那么请下载使用apache-zookeeper-3.5.5-bin.tar.gz而非apache-zookeeper-3.5.5.tar.gz，后者是源码包，即src包。

下载地址如下：https://mirrors.tuna.tsinghua.edu.cn/apache/zookeeper/zookeeper-3.5.5/

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[Link 1]: https://blog.csdn.net/J080624/article/details/78676088
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