Sathish Kumar created HDFS-15772:
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Summary: Namenode not failover
Key: HDFS-15772
URL: https://issues.apache.org/jira/browse/HDFS-15772
Project: Hadoop HDFS
Issue Type: Bug
Components: hdfs
Affects Versions: 3.1.4
Environment: HDP 3.1.4 with Ambari 2.7.4
Reporter: Sathish Kumar
When the directory /etc/secruity/keytabs folder removed on HDP 3.1.4 due to
human error, the NN service down and it didn't failover to standby node in HA
configuration. This issue can be reproduced simply by removing the
/etc/security/keytabs folder. It looks the namenode didn't failover due to ZKFC
as HA is controlled by ZKFC and it used its old connection and could not detect
any loss of keytabs which prevented the failover. After restarting the ZKFC on
the active namenode its fails to establish connection as it couldn't find the
keytabs and eventually fails over to standby node which becomes active nn.
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