hadoop高可用集群启动yarn失败,通过查看日志信息发现主要错误如下:

org.apache.zookeeper.ClientCnxn: Session 0x0 for server null, unexpected error, closing socket connection and attempting reconnect 
java.net.ConnectException: 拒绝连接

org.apache.zookeeper.ClientCnxn: Session 0x0 for server null, unexpected error, closing socket connection and attempting reconnect java.net.ConnectException: 拒绝连接

Hadoop依赖Zookeeper实现HDFS集群的高可用,我这里zookeeper集群没有正常启动

导致了yarn集群启动失败

把zookeeper集群正常启动后就没问题了。

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