[
https://issues.apache.org/jira/browse/HIVE-19937?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Sahil Takiar updated HIVE-19937:
--------------------------------
Resolution: Fixed
Fix Version/s: 4.0.0
Status: Resolved (was: Patch Available)
Thanks for taking a look Vihang. I addressed your comments and attached an
updated patch. Since the change was just to add new comments, I don't think its
necessary to re-run Hive QA, so I went ahead and pushed this to master.
> Intern fields in MapWork on deserialization
> -------------------------------------------
>
> Key: HIVE-19937
> URL: https://issues.apache.org/jira/browse/HIVE-19937
> Project: Hive
> Issue Type: Improvement
> Components: Spark
> Reporter: Sahil Takiar
> Assignee: Sahil Takiar
> Priority: Major
> Fix For: 4.0.0
>
> Attachments: HIVE-19937.1.patch, HIVE-19937.2.patch,
> HIVE-19937.3.patch, HIVE-19937.4.patch, HIVE-19937.5.patch,
> HIVE-19937.6.patch, post-patch-report.html, report.html
>
>
> When fixing HIVE-16395, we decided that each new Spark task should clone the
> {{JobConf}} object to prevent any {{ConcurrentModificationException}} from
> being thrown. However, setting this variable comes at a cost of storing a
> duplicate {{JobConf}} object for each Spark task. These objects can take up a
> significant amount of memory, we should intern them so that Spark tasks
> running in the same JVM don't store duplicate copies.
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
