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Posted to issues@lucene.apache.org by "Simon Willnauer (Jira)" <ji...@apache.org> on 2020/08/24 19:36:00 UTC

[jira] [Resolved] (LUCENE-9478) DWPTDeleteQueue leaks memory

     [ https://issues.apache.org/jira/browse/LUCENE-9478?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Simon Willnauer resolved LUCENE-9478.
-------------------------------------
    Fix Version/s: 8.6.2
                   8.7
                   master (9.0)
    Lucene Fields: New,Patch Available  (was: New)
         Assignee: Simon Willnauer
       Resolution: Fixed

> DWPTDeleteQueue leaks memory
> ----------------------------
>
>                 Key: LUCENE-9478
>                 URL: https://issues.apache.org/jira/browse/LUCENE-9478
>             Project: Lucene - Core
>          Issue Type: Bug
>    Affects Versions: master (9.0), 8.7, 8.6.1
>            Reporter: Simon Willnauer
>            Assignee: Simon Willnauer
>            Priority: Blocker
>             Fix For: master (9.0), 8.7, 8.6.2
>
>          Time Spent: 2h 20m
>  Remaining Estimate: 0h
>
> We introduced a broken behavior that leaks memory in DWPTDeleteQueue recently (LUCENE-9304)  The line [here|https://github.com/apache/lucene-solr/blob/18af6325ed98b50c23a1f026ab9d05f17039c731/lucene/core/src/java/org/apache/lucene/index/DocumentsWriterDeleteQueue.java#L594-L596] tries to be smart and even adds a comment that the current impl is safe but it isn't if you reference a final member in a lambda it references _this_ which holds on to the object. I think we need to do a quick 8.6.2 for this. 



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