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The big problem of HA automatic failover (active) namenode

2022-07-22 16:03:00 【Will growth evolve XM】

We go through zkCli You can go in /hadoop-ha/mycluster/ActiveStandbyElectorLock

Get our active Of namenode Who is it? , however ！

If we kill fall active Of namenode We will find that ：

The value in our store will keep changing （ Other namenode）, And other namenode Are still standby

Here is about the parameter configuration of the isolation mechanism

I don't know the principle

however

Go to hdfs-site.xml

The isolation method is written like this

<property>
<name>dfs.ha.fencing.methods</name>
<value>sshfence</value>
<value>shell(true)</value>
</property>

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