Jing Zhao created HDFS-7388: ------------------------------- 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. -- This message was sent by Atlassian JIRA (v6.3.4#6332)