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From "Jing Zhao (JIRA)" <j...@apache.org>
Subject [jira] [Assigned] (HDFS-7388) Improve the log for HA failover
Date Mon, 10 Nov 2014 23:32:34 GMT

     [ https://issues.apache.org/jira/browse/HDFS-7388?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jing Zhao reassigned HDFS-7388:
-------------------------------

    Assignee: Jing Zhao

> 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
>            Assignee: 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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