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https://issues.apache.org/jira/browse/HBASE-15433?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15201414#comment-15201414
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Ted Yu commented on HBASE-15433:
--------------------------------
Jianwei:
I looked at the scenario (region counts of 8 and 10 in snapshots) above where
retrieving from region locator may produce inaccurate end result.
We can go with path v4.
Since branch-1 is among the Fix versions, can you attach patch for branch-1 ?
branch-1 tests are more stable, hopefully we can get higher confidence.
Thanks
> SnapshotManager#restoreSnapshot not update table and region count quota
> correctly when encountering exception
> -------------------------------------------------------------------------------------------------------------
>
> Key: HBASE-15433
> URL: https://issues.apache.org/jira/browse/HBASE-15433
> Project: HBase
> Issue Type: Bug
> Components: snapshots
> Affects Versions: 2.0.0
> Reporter: Jianwei Cui
> Assignee: Jianwei Cui
> Fix For: 2.0.0, 1.3.0, 1.2.1, 1.4.0, 1.1.5
>
> Attachments: HBASE-15433-trunk-v1.patch, HBASE-15433-trunk-v2.patch,
> HBASE-15433-trunk.patch, HBASE-15433-v3.patch, HBASE-15433-v4.patch
>
>
> In SnapshotManager#restoreSnapshot, the table and region quota will be
> checked and updated as:
> {code}
> try {
> // Table already exist. Check and update the region quota for this
> table namespace
> checkAndUpdateNamespaceRegionQuota(manifest, tableName);
> restoreSnapshot(snapshot, snapshotTableDesc);
> } catch (IOException e) {
>
> this.master.getMasterQuotaManager().removeTableFromNamespaceQuota(tableName);
> LOG.error("Exception occurred while restoring the snapshot " +
> snapshot.getName()
> + " as table " + tableName.getNameAsString(), e);
> throw e;
> }
> {code}
> The 'checkAndUpdateNamespaceRegionQuota' will fail if regions in the snapshot
> make the region count quota exceeded, then, the table will be removed in the
> 'catch' block. This will make the current table count and region count
> decrease, following table creation or region split will succeed even if the
> actual quota is exceeded.
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