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https://issues.apache.org/jira/browse/KUDU-2802?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16845685#comment-16845685
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Xu Yao commented on KUDU-2802:
------------------------------
https://gerrit.cloudera.org/#/c/13401/
> The Java client tableExists should use GetTableSchema
> -----------------------------------------------------
>
> Key: KUDU-2802
> URL: https://issues.apache.org/jira/browse/KUDU-2802
> Project: Kudu
> Issue Type: Improvement
> Affects Versions: 1.9.0
> Reporter: Grant Henke
> Assignee: Xu Yao
> Priority: Major
>
> Currently the Java client `tableExists()` method uses a ListTables rpc.
> Instead it should use a GetTableSchema rpc.
> Based on a comment in this
> [review|https://gerrit.cloudera.org/#/c/13120/2/java/kudu-backup/src/main/scala/org/apache/kudu/backup/KuduBackup.scala@51]
> it could be especially important when authorization via Sentry is enabled:
> {quote}
> ...tableExists() is a bad idea if Sentry integration is enabled. That's
> because tableExists() results in a ListTables RPC, and ListTables is going to
> perform really poorly with a cold Sentry cache: it'll send an RPC to Sentry
> for every table in the catalog. Coupled with the loop here (for each table
> being backed up) and it's bad news all around...
> {quote}
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