[jira] [Resolved] (HADOOP-8041) HA: log a warning when a failover is first attempted

["Todd Lipcon (Resolved) (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HADOOP-8041?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Todd Lipcon resolved HADOOP-8041.
---------------------------------

       Resolution: Fixed
    Fix Version/s: HA Branch (HDFS-1623)
     Hadoop Flags: Reviewed

Committed to branch, thanks.
                
> HA: log a warning when a failover is first attempted 
> -----------------------------------------------------
>
>                 Key: HADOOP-8041
>                 URL: https://issues.apache.org/jira/browse/HADOOP-8041
>             Project: Hadoop Common
>          Issue Type: Sub-task
>          Components: ha
>    Affects Versions: HA Branch (HDFS-1623)
>            Reporter: Eli Collins
>            Assignee: Todd Lipcon
>             Fix For: HA Branch (HDFS-1623)
>
>         Attachments: hadoop-8041.txt
>
>
> Currently we always warn for each client operation made to a NN we've failedover to:
> {noformat}
> hadoop-0.24.0-SNAPSHOT $ ./bin/hdfs dfs -lsr /
> 12/02/08 17:43:04 WARN retry.RetryInvocationHandler: Exception while invoking getFileInfo of class
> org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolTranslatorPB after 0 fail over attempts. Trying to fail over immediately.
> {noformat}
> I'm going to remove this warning in HDFS-2922 since we shouldn't warn every time a client performs an operation, eg could be weeks after the failover. But we should eg log a warning when the client first does a failover so it shows up eg in the MR and HBase logs.

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