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https://issues.apache.org/jira/browse/HDFS-1258?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14144289#comment-14144289
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Guo Ruijing commented on HDFS-1258:
-----------------------------------
create HDFS-7133 to support clearing namespace quota
> Clearing namespace quota on "/" corrupts FS image
> -------------------------------------------------
>
> Key: HDFS-1258
> URL: https://issues.apache.org/jira/browse/HDFS-1258
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: namenode
> Reporter: Aaron T. Myers
> Assignee: Aaron T. Myers
> Priority: Blocker
> Fix For: 0.20.3, 0.20-append, 0.20.204.0, 0.21.0, 0.22.0
>
> Attachments: clear-quota-0.20.patch, clear-quota-0.21.patch,
> clear-quota.patch, clear-quota.patch
>
>
> The HDFS root directory starts out with a default namespace quota of
> Integer.MAX_VALUE. If you clear this quota (using "hadoop dfsadmin -clrQuota
> /"), the fsimage gets corrupted immediately. Subsequent 2NN rolls will fail,
> and the NN will not come back up from a restart.
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