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https://issues.apache.org/jira/browse/KUDU-1802?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Grant Henke resolved KUDU-1802.
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Fix Version/s: 1.13.0
Resolution: Fixed
> Deserializing scan tokens should avoid round-trip to master
> -----------------------------------------------------------
>
> Key: KUDU-1802
> URL: https://issues.apache.org/jira/browse/KUDU-1802
> Project: Kudu
> Issue Type: Improvement
> Components: client, perf
> Affects Versions: 1.2.0
> Reporter: Todd Lipcon
> Assignee: Grant Henke
> Priority: Major
> Labels: impala, ramp-up
> Fix For: 1.13.0
>
>
> Currently, KuduScanToken::DeserializeIntoScanner calls
> KuduClient::OpenTable() which makes a GetTableSchema call to the master. This
> round trip is a bit expensive because it's always a "thundering herd" for an
> Impala query or Spark job -- every host deserializes a bunch of scan tokens
> at the same time and ends up having to back off.
> We should consider some ways to avoid this.
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