Which of the following statements about ZKFC is wrong?
A.
ZKFC (ZKFailoverController) is used as a Zookeeper cluster client to monitor the status information of NameNodel
B.
The ZKFC process needs to be deployed in NameNodel's node and Zookeeper's Leader node
C.
Standby NameNodej perceives the status of Active NameNodel through Zookeeper. Once the Active NameNode is down, the Standby NameNode will perform the main upgrade operation.
D.
The ZKFC of HDFS NameNodel connects to Zookeeper, and saves the host name and other information in Zookeeper
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