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https://issues.apache.org/jira/browse/HDFS-13813?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16575467#comment-16575467
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Siyao Meng commented on HDFS-13813:
-----------------------------------
Thanks [~yzhangal] for the comment.
Sure, I will definitely add an option in the future to reduce overhead when
things are working fine.
> Exit NameNode when dangling child inode is detected when saving FsImage
> -----------------------------------------------------------------------
>
> Key: HDFS-13813
> URL: https://issues.apache.org/jira/browse/HDFS-13813
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: hdfs
> Affects Versions: 3.0.3
> Reporter: Siyao Meng
> Assignee: Siyao Meng
> Priority: Major
> Attachments: HDFS-13813.001.patch
>
>
> Recently, the same stack trace as in -HDFS-9406- appears again in the field.
> The symptom of the problem is that *loadINodeDirectorySection()* can't find a
> child inode in inodeMap by the node id in the children list of the directory.
> The child inode could be missing or deleted.
> As for now we didn't have a clear trace to reproduce the problem. Therefore,
> I'm proposing this improvement to detect such corruption (data structure
> inconsistency) when saving the FsImage, so that we can have the FsImage and
> Edit Log to hopefully reproduce the problem stably.
>
> In a previous patch HDFS-13314, [~arpitagarwal] did a great job catching
> potential FsImage corruption in two cases. This patch includes a third case
> where a child inode does not exist in the global FSDirectory dir when saving
> (serializing) INodeDirectorySection.
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