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From "Mark Miller (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (SOLR-1953) It may be possible for temporary files to accumulator until the Solr process is shut down
Date Mon, 19 Dec 2016 18:28:58 GMT

     [ https://issues.apache.org/jira/browse/SOLR-1953?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Mark Miller resolved SOLR-1953.
-------------------------------
       Resolution: Fixed
    Fix Version/s: 6.4
                   master (7.0)

Thanks Karl! Long lived issue.

> It may be possible for temporary files to accumulator until the Solr process is shut
down
> -----------------------------------------------------------------------------------------
>
>                 Key: SOLR-1953
>                 URL: https://issues.apache.org/jira/browse/SOLR-1953
>             Project: Solr
>          Issue Type: Bug
>          Components: update
>    Affects Versions: 1.4.1, 1.5
>            Reporter: Karl Wright
>            Assignee: Mark Miller
>              Labels: file_leak, memory_leak
>             Fix For: master (7.0), 6.4
>
>         Attachments: SOLR-1953.patch, SOLR-1953.patch, SOLR-1953.patch
>
>
> While researching SOLR-1951, the behavior of commons-fileupload in handling multipart
form posts came into question.  commons-fileupload creates a temporary file for the main content
area of such posts, and purportedly has a background thread which cleans up these files. 
However, Mark Miller discovered that the javadoc in this matter may be incorrect, and that
commons-fileupload may in fact just be adding files to the JVM's list of files needing cleanup
on exit.
> If so, this will show up in two ways: first, temporary files will accumulate in the java.io.tmpdir
area.  Second, non-heap memory for the JVM will slowly increase over time (since the file
pointers the JVM tracks in this way are not kept in the java heap).
> I will attach a potential fix; however, this ticket should be viewed as a workitem for
the need for further research in this area.



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