ZKFC服务异常：Parent znode does not exist.

Posted 2020-12-03

昨天搭建了一套hadoop集群，今天发现两个namenode的zkfc服务起不来，在zkfc日志中发现如下所示的信息：

Unable to start failover controller. Parent znode does not exist.

./bin/zkCli.sh -server master1

ls /

没有看到/hadoop-ha

解决方法：

进入hadoop namenode服务器

./bin/hdfs zkfc -formatZK

在两个namenode节点上启动zkfc服务

./sbin/hadoop-daemon.sh start zkfc

查看master1节点状态

./bin/hdfs haadmin -getServiceState master1

active

actice namenode节点转移

./bin/hdfs haadmin -failover master1 master2

查看是否转移

./bin/hdfs haadmin -getServiceState master1

standby

./bin/hdfs haadmin -getServiceState master2

active

参考：

https://blog.csdn.net/houzhizhen/article/details/44099825