Quota counts missed between clear quota and set quota
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Key: HDFS-1189
URL: https://issues.apache.org/jira/browse/HDFS-1189
Project: Hadoop HDFS
Issue Type: Bug
Components: name-node
Affects Versions: 0.20.2, 0.22.0
Reporter: Xiao Kang
HDFS Quota counts will be missed between a clear quota operation and a set
quota.
When setting quota for a dir, the INodeDirectory will be replaced by
INodeDirectoryWithQuota and dir.isQuotaSet() becomes true. When
INodeDirectoryWithQuota is newly created, quota counting will be performed.
However, when clearing quota, the quota conf is set to -1 and dir.isQuotaSet()
becomes false while INodeDirectoryWithQuota will NOT be replaced back to
INodeDirectory.
FSDirectory.updateCount just update the quota count for inodes that
isQuotaSet() is true. So after clear quota for a dir, its quota counts will not
be updated and it's reasonable. But when re seting quota for this dir, quota
counting will not be performed and some counts will be missed.
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