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