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https://issues.apache.org/jira/browse/HBASE-30483?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ASF GitHub Bot updated HBASE-30483:
-----------------------------------
Labels: pull-request-available (was: )
> Namespace region quota count is not updated correctly after truncating a table
> ------------------------------------------------------------------------------
>
> Key: HBASE-30483
> URL: https://issues.apache.org/jira/browse/HBASE-30483
> Project: HBase
> Issue Type: Bug
> Reporter: Yurong Fu
> Priority: Major
> Labels: pull-request-available
>
> When a table is truncated without preserving its splits, the old regions are
> replaced by a new primary region. However, the namespace region quota count
> maintained in NamespaceStateManager may still reflect the number of regions
> before truncation.
> For example, suppose a namespace has a region quota of 2 and a table has 2
> primary regions. After truncating the table without preserving splits, the
> table has only 1 primary region, but the cached namespace region count may
> remain at 2. A subsequent split can then be rejected with a
> QuotaExceededException, even though the split would only bring the actual
> region from 1 to 2.
> Expected Behavior:
> After truncation, the namespace region quota count should reflect the number
> of primary regions in the replacement table.
> Actual Behavior:
> The cached region count may remain stale after truncation, causing valid
> region operations to be rejected.
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