Jing Zhao created HDFS-7388:
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Summary: Improve the log for HA failover
Key: HDFS-7388
URL: https://issues.apache.org/jira/browse/HDFS-7388
Project: Hadoop HDFS
Issue Type: Sub-task
Components: ha
Reporter: Jing Zhao
Currently to debug an issue during the NN HA failover (with automatic failover
setup), we usually need to check log from all the NN and ZKFC daemons to figure
out what triggered the failover. Possible reasons include NN health issue,
connection issues between zkfc and NN, connection issues between zkfc and ZK,
and manual op started by admin. It will be helpful to improve the log in NN and
ZKFC and add more information to make the debug easier.
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