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Posted to dev@lucene.apache.org by "Alexandre Rafalovitch (JIRA)" <ji...@apache.org> on 2016/10/06 17:11:20 UTC
[jira] [Commented] (SOLR-1953) It may be possible for temporary
files to accumulator until the Solr process is shut down
[ https://issues.apache.org/jira/browse/SOLR-1953?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15552541#comment-15552541 ]
Alexandre Rafalovitch commented on SOLR-1953:
---------------------------------------------
Looking at the code, we may _still_ have this type of memory leaks discussed in 1.4. At least I don't see any registrations with setFileCleaningTracker() as suggested in the patch.
> 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
> Labels: file_leak, memory_leak
> Attachments: 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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