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From "Hari Mankude (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-2753) Standby namenode stuck in safemode during a failover
Date Fri, 06 Jan 2012 01:09:39 GMT

    [ https://issues.apache.org/jira/browse/HDFS-2753?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13181014#comment-13181014
] 

Hari Mankude commented on HDFS-2753:
------------------------------------

Hi Aaron,

This is the info from NN

Started:	Fri Jan 06 00:32:04 UTC 2012
Version:	0.24.0-SNAPSHOT, 1227260 ---> version number.

Doing another clean build to make sure that the problem exists.

Seems like commenting out the optimization in processReport() fixes the problem. 

      // To minimize startup time, we discard any second (or later) block reports
      // that we receive while still in startup phase.
      if (namesystem.isInStartupSafeMode() && node.numBlocks() > 0) {
        NameNode.stateChangeLog.info("BLOCK* processReport: "
            + "discarded non-initial block report from " + nodeID.getName()
            + " because namenode still in startup phase");
        return;
      }


                
> Standby namenode stuck in safemode during a failover
> ----------------------------------------------------
>
>                 Key: HDFS-2753
>                 URL: https://issues.apache.org/jira/browse/HDFS-2753
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: ha, name-node
>    Affects Versions: HA branch (HDFS-1623)
>            Reporter: Hari Mankude
>            Assignee: Hari Mankude
>
> Write traffic initiated from the client. Manual failover is done by killing NN and converting
a  different standby to active. NN is restarted as standby. The restarted standby stays in
safemode forever. More information in the description.

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