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From "Mark Miller (JIRA)" <j...@apache.org>
Subject [jira] Commented: (SOLR-1953) It may be possible for temporary files to accumulator until the Solr process is shut down
Date Wed, 16 Jun 2010 01:04:23 GMT

    [ https://issues.apache.org/jira/browse/SOLR-1953?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12879214#action_12879214
] 

Mark Miller commented on SOLR-1953:
-----------------------------------

Yup - def looks to me like we only want one Tracker instance rather than a new one everytime
- and we also want to call exitWhenFinished in some clean up code - perhaps in SolrDispatchFilter#destroy()

> 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
>         Attachments: 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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