[jira] [Commented] (HIVE-21642) Hive server leaks memory on data insertion

["Rentao Wu (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HIVE-21642?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16862257#comment-16862257 ] 

Rentao Wu commented on HIVE-21642:
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[~gopalv] which patch on Hive master addresses this memory leak?

> Hive server leaks memory on data insertion
> ------------------------------------------
>
>                 Key: HIVE-21642
>                 URL: https://issues.apache.org/jira/browse/HIVE-21642
>             Project: Hive
>          Issue Type: Bug
>          Components: HiveServer2
>    Affects Versions: 2.3.4
>         Environment: * Amazon Hadoop Distribution emr-5.20.0
>  * Master mode with 4 CPU and 16 GB RAM
>  * Table files stored in S3 cloud storage
>            Reporter: Alexander Knopov
>            Priority: Major
>
> We are continuously loading data into Hive table stored in ORC format by appending data in batches. We repeatedly have seen that over a span of few days Hive server experience {{OutOfMemoryError}} exceptions that we believe are caused by memory leaks.
> Comparing heap dumps shows that most suspicious classes that show persistent growth are and not recycled with GC are
>  * {{org.apache.hadoop.hive.ql.io.orc.OrcStruct$Field}}
>  * {{org.apache.hadoop.hive.serde2.objectinspector.UnionStructObjectInspector$MyField}}
>  * {{String}}
> Sample program used for stress test and heap dumps from 700 to 2500 GB can be uploaded on request. They are too big for Jira backing store



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