启动KAFKA报错相关问题

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已于 2022-05-20 09:54:54 修改

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分类专栏：消息队列文章标签： java kafka

于 2022-05-20 09:43:25 首次发布

本文链接：https://blog.youkuaiyun.com/decade_10/article/details/124877272

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本文介绍了Zookeeper启动时遇到的`java.lang.NullPointerException`异常及解决方法，即删除dataDir目录下的version-2文件夹。同时，针对Kafka启动报错`The broker is trying to join the wrong cluster`，提出了检查log.dirs配置并删除meta.properties文件的解决方案。

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1.关于zookerper启动时报java.lang.NullPointerException异常

具体报错代码段

2022-05-20 09:36:32,492 [myid:] - ERROR [main:ZooKeeperServerMain@63] - Unexpected exception, exiting abnormally
java.lang.NullPointerException
        at org.apache.zookeeper.server.persistence.FileTxnSnapLog.processTransaction(FileTxnSnapLog.java:203)
        at org.apache.zookeeper.server.persistence.FileTxnSnapLog.restore(FileTxnSnapLog.java:150)
        at org.apache.zookeeper.server.ZKDatabase.loadDataBase(ZKDatabase.java:223)
        at org.apache.zookeeper.server.ZooKeeperServer.loadData(ZooKeeperServer.java:256)
        at org.apache.zookeeper.server.ZooKeeperServer.startdata(ZooKeeperServer.java:384)
        at org.apache.zookeeper.server.NIOServerCnxnFactory.startup(NIOServerCnxnFactory.java:138)
        at org.apache.zookeeper.server.ZooKeeperServerMain.runFromConfig(ZooKeeperServerMain.java:112)
        at org.apache.zookeeper.server.ZooKeeperServerMain.initializeAndRun(ZooKeeperServerMain.java:86)
        at org.apache.zookeeper.server.ZooKeeperServerMain.main(ZooKeeperServerMain.java:52)
        at org.apache.zookeeper.server.quorum.QuorumPeerMain.initializeAndRun(QuorumPeerMain.java:116)
        at org.apache.zookeeper.server.quorum.QuorumPeerMain.main(QuorumPeerMain.java:78)

解决方案：

找到配置文件中设置的dataDir目录下，将version-2文件夹删除，重启服务即可

2.启动kafka报错，The broker is trying to join the wrong cluster. Configured zookeeper.connect may be wrong

解决方案：

log.dirs的配置路径要正确，并且需要删除你配置好的log.dirs路径下的meta.properties 文件