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From "Karl Wright (JIRA)" <j...@apache.org>
Subject [jira] Created: (SOLR-1953) It may be possible for temporary files to accumulator until the Solr process is shut down
Date Tue, 15 Jun 2010 11:01:24 GMT
It may be possible for temporary files to accumulator until the Solr process is shut down
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                 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


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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