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From "Todd Lipcon (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-9545) Improve logging in ActiveStandbyElector
Date Fri, 10 May 2013 04:19:16 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-9545?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13653526#comment-13653526

Todd Lipcon commented on HADOOP-9545:

I did eventually diagnose the issue here, and it turned out to be a ZK server side bug in
which the different ZK servers had gotten out of sync with each other. So ZKFC was actually
doing the right thing. But yep, I still want to bump the logging -- further logging would
have made it far more obvious that ZK was at fault here rather than a ZKFC issue. Thanks for
the pointer to ZOOKEEPER-1702, though.
> Improve logging in ActiveStandbyElector
> ---------------------------------------
>                 Key: HADOOP-9545
>                 URL: https://issues.apache.org/jira/browse/HADOOP-9545
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: auto-failover, ha
>    Affects Versions: 2.0.5-beta
>            Reporter: Todd Lipcon
>            Assignee: Todd Lipcon
>            Priority: Minor
> The ActiveStandbyElector currently logs a lot of stuff at DEBUG level which would be
useful for troubleshooting. We've seen one instance in the wild of a ZKFC thinking it should
be in standby state when in fact it won the election, but the logging is insufficient to understand
why. I'd like to bump most of the existing DEBUG logs to INFO and add some additional logs
as well.

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