Hadoop HA, two namenode node, including node ZKFC start up, view the logs, display error as follows
[root @ masterbac logs] # tail hadoop - root -
Java. Lang. This. LoadClass (424). This Java:
At sun. Misc. The Launcher $AppClassLoader. LoadClass (349). The Launcher Java:
The at Java. Lang. This. LoadClass (357). This Java:
The at Java. Lang. Class. ForName0 (Native Method)
The at Java. Lang. Class.forname (264) Class. Java:
At org, apache hadoop. Ha.. NodeFencer createFenceMethod (NodeFencer. Java: 158)
. 7 more
The 2021-01-02 21:59:56, 309 INFO org. Apache. Hadoop. Ha. ActiveStandbyElector: Session connected.
The 2021-01-02 21:59:56, 315 INFO org. Apache. Zookeeper. Zookeeper: Session: 0 x176c6018f320002 closed
The 2021-01-02 21:59:56, 315 INFO org. Apache. Zookeeper. ClientCnxn: EventThread shut down
[root @ masterbac logs] # date
On Saturday, January 02, 2021 22:03:04 EST


Ask bosses, there is only the reason for the error?