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https://issues.apache.org/jira/browse/HDFS-15290?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Simbarashe Dzinamarira updated HDFS-15290:
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Attachment: (was: HDFS-15290.001.patch)
> NPE in HttpServer during NameNode startup
> -----------------------------------------
>
> Key: HDFS-15290
> URL: https://issues.apache.org/jira/browse/HDFS-15290
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: namenode
> Affects Versions: 2.7.8
> Reporter: Konstantin Shvachko
> Assignee: Simbarashe Dzinamarira
> Priority: Major
>
> When NameNode starts it first starts HttpServer, then starts loading fsImage
> and edits. While loading the namesystem field in NameNode is null. I saw that
> a StandbyNode sends a checkpoint request, which fails with NPE because
> NNStorage is not instantiated yet.
> We should check the NameNode startup status before accepting checkpoint
> requests.
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