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https://issues.apache.org/jira/browse/COUCHDB-1309?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13129045#comment-13129045
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Benoit Chesneau commented on COUCHDB-1309:
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@davisp mostly what I had in head.
> File descriptor leaks on design document update and view cleanup
> ----------------------------------------------------------------
>
> Key: COUCHDB-1309
> URL: https://issues.apache.org/jira/browse/COUCHDB-1309
> Project: CouchDB
> Issue Type: Bug
> Reporter: Filipe Manana
> Assignee: Filipe Manana
> Attachments: couchdb-1309_12x.patch, couchdb-1309_trunk.patch
>
>
> If we add a design document with views defined in it, open the corresponding
> view group (by querying one of its views for e.g.), then update the design
> document in such a way that the view signature changes (changing a view's map
> function code for e.g), the old view group remains open forever (unless a
> server restart happens) and keeps it's view file reference counter active
> forever.
> If a view cleanup request comes, the old view file is not deleted since the
> reference counter is not dropped by the old view group, keeping the file
> descriptor in use forever.
> This leakage is different from what is reported in COUCHDB-1129 but it's
> somehow related.
> The attached patch, simply shutdowns a view group when the design document is
> updated and the new view signature changes, releasing the old view file
> descriptor (as soon as no more clients are using the old view).
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