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Posted to hdfs-dev@hadoop.apache.org by "Todd Lipcon (JIRA)" <ji...@apache.org> on 2013/08/14 23:25:48 UTC

[jira] [Resolved] (HDFS-3656) ZKFC may write a null "breadcrumb" znode

     [ https://issues.apache.org/jira/browse/HDFS-3656?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Todd Lipcon resolved HDFS-3656.
-------------------------------

          Resolution: Duplicate
    Target Version/s:   (was: )

Yep, I think you're right. Thanks.
                
> ZKFC may write a null "breadcrumb" znode
> ----------------------------------------
>
>                 Key: HDFS-3656
>                 URL: https://issues.apache.org/jira/browse/HDFS-3656
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: auto-failover
>    Affects Versions: 2.0.0-alpha
>            Reporter: Todd Lipcon
>
> A user [reported|https://issues.cloudera.org/browse/DISTRO-412] an NPE trying to read the "breadcrumb" znode in the failover controller. This happened repeatedly, implying that an earlier process set the znode to null - probably some race, though I don't see anything obvious in the code.

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