Managing Clusters
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When repair fails on NAMENODE in an HA cluster

When repair fails on NAMENODE in an HA cluster, follow these steps to fix the cluster.

In such cases, there is a set of manual steps which have to be executed to resolve the problem and bootstrap the namenode:
  1. Access the newly launched repaired host via SSH.
  2. Run the following commands:
    su hdfs
    hdfs namenode -bootstrapStandby
  3. Synchronize your cluster.