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https://issues.apache.org/jira/browse/HIVE-22770?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17024468#comment-17024468
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Ashutosh Chauhan commented on HIVE-22770:
-----------------------------------------
Configuration conf = ((KryoWithHooks) kryo).getConf();
+ if (conf != null &&
conf.get(HiveConf.ConfVars.HIVE_EXECUTION_ENGINE.varname,
"").equalsIgnoreCase("spark")) {
+ mapWork.internFields();
+ }
+
Lets remove above code block. With that removed we won't need {{new
Configuration}} which is an expensive call. That means we will never intern
fields.
> Skip interning of MapWork fields for tez during deserialization
> ---------------------------------------------------------------
>
> Key: HIVE-22770
> URL: https://issues.apache.org/jira/browse/HIVE-22770
> Project: Hive
> Issue Type: Improvement
> Reporter: László Bodor
> Assignee: László Bodor
> Priority: Major
> Attachments: HIVE-22770.01.patch, HIVE-22770.01.patch,
> HIVE-22770.02.patch, HIVE-22770.02.patch
>
>
> HIVE-19937 introduced some interning logic into mapwork deserialization
> process, but it's only related to spark, maybe we should skip this for tez,
> reducing the cpu pressure in tez tasks.
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