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Posted to common-issues@hadoop.apache.org by "Zoltan Haindrich (JIRA)" <ji...@apache.org> on 2019/01/21 15:21:00 UTC

[jira] [Commented] (HADOOP-16062) Add ability to disable Configuration reload registry

    [ https://issues.apache.org/jira/browse/HADOOP-16062?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16748020#comment-16748020 ] 

Zoltan Haindrich commented on HADOOP-16062:
-------------------------------------------

As these objects are belong to already closed sessions; they are just occupying heap space - and will force a "bigger" garbage collection eventually.
I would like to propose to add a "toggle" to make it possible to disable this feature.


> Add ability to disable Configuration reload registry
> ----------------------------------------------------
>
>                 Key: HADOOP-16062
>                 URL: https://issues.apache.org/jira/browse/HADOOP-16062
>             Project: Hadoop Common
>          Issue Type: Improvement
>            Reporter: Zoltan Haindrich
>            Priority: Major
>
> In Hive we see that after an extensive amount of usage there are a lot of Configuration objects not fully reclaimed because of Configuration's REGISTRY weak hashmap.
> https://github.com/apache/hadoop/blob/abde1e1f58d5b699e4b8e460cff68e154738169b/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/conf/Configuration.java#L321



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