Konstantin Shvachko created HDFS-15290:
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Summary: 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
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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