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From "Todd Lipcon (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-2747) HA: entering safe mode after starting SBN can NPE
Date Fri, 13 Jan 2012 18:56:40 GMT

    [ https://issues.apache.org/jira/browse/HDFS-2747?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13185749#comment-13185749

Todd Lipcon commented on HDFS-2747:

I think the best bet is to check if the log is open for write before calling logSyncAll. If
it's not open for write, we can skip logSyncAll in enterSafeMode, right?
> HA: entering safe mode after starting SBN can NPE
> -------------------------------------------------
>                 Key: HDFS-2747
>                 URL: https://issues.apache.org/jira/browse/HDFS-2747
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: ha
>    Affects Versions: HA branch (HDFS-1623)
>            Reporter: Eli Collins
>            Assignee: Uma Maheswara Rao G
> Entering Safemode on the primary after while it's already in safemode after the SBN is
started results in an NPE: 
> {noformat}
> hadoop-0.24.0-SNAPSHOT $ ./bin/hdfs dfsadmin -safemode get
> Safe mode is ON
> hadoop-0.24.0-SNAPSHOT $ ./bin/hdfs dfsadmin -safemode enter
> safemode: java.lang.NullPointerException
> {noformat}

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