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https://issues.apache.org/jira/browse/HDFS-4627?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jing Zhao updated HDFS-4627:
----------------------------
Description:
1. Currently FSImageFormat#Loader#loadFilesUnderConstruction calls
FSDirectory#unprotectedReplaceINodeFile without acquiring FSDirectory's lock.
FSDirectory#replaceINodeFile should be called instead.
2. Currently FSImage#Loader#loadINode does not create block[] object (i.e.,
keep it as null) when the length of the block is 0. This will cause NPE when
the loaded INodeFile is empty, and then an append operation on this inode is
applied from edit log.
was:Currently FSImageFormat#Loader#loadFilesUnderConstruction calls
FSDirectory#unprotectedReplaceINodeFile without acquiring FSDirectory's lock.
FSDirectory#replaceINodeFile should be called instead.
> Fix FSImageFormat#Loader
> ------------------------
>
> Key: HDFS-4627
> URL: https://issues.apache.org/jira/browse/HDFS-4627
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: datanode, namenode
> Reporter: Jing Zhao
> Assignee: Jing Zhao
> Attachments: HDFS-4627.001.patch
>
>
> 1. Currently FSImageFormat#Loader#loadFilesUnderConstruction calls
> FSDirectory#unprotectedReplaceINodeFile without acquiring FSDirectory's lock.
> FSDirectory#replaceINodeFile should be called instead.
> 2. Currently FSImage#Loader#loadINode does not create block[] object (i.e.,
> keep it as null) when the length of the block is 0. This will cause NPE when
> the loaded INodeFile is empty, and then an append operation on this inode is
> applied from edit log.
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