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Can a Hadoop Cluster be configured for a manual failover of a NameNode

Can a Hadoop Cluster be configured for a manual failover of a NameNode

New Contributor

We are trying to set up a Hadoop automatic fail-over cluster. We are having many issues. the NameNode and Zookeeper FailOver Controller crashes unexpectedly. With all the crashes Both NameNodes are in a active state which will cause a split brain issue with the cluster.

It is simple not working and does not appear to be a robust solution. Please see this URL

https://community.hortonworks.com/questions/120957/zookeeper-failover-controller-crashes-when-the-ha...

For the details of the problem.

We would like to down grade from the automatic fail-over cluster to a manual fail-over cluster. Is there a way to do that. We want to manually tell the NameNodes what state they should be in Active or Standby - is there a way to do this.

We are using the following versions: - hadoop-2.7.3 - zookeeper-3.4.10

1 REPLY 1

Re: Can a Hadoop Cluster be configured for a manual failover of a NameNode

@Albert Stark

You can configure the fencing method to avoid Split-brain scenario,

https://docs.hortonworks.com/HDPDocuments/HDP2/HDP-2.3.0/bk_hadoop-ha/content/ha-nn-config-cluster.h...

Check the link and configure HDFS for fencing method.

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