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https://issues.apache.org/jira/browse/DERBY-3354?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12585049#action_12585049
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Øystein Grøvlen commented on DERBY-3354:
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I do think that it is a good idea to put disk operations in a finalizer, but it
should be possible to record work that needs to be done (e.g., at transaction
commit). I do not think delaying clean-up of files until db reboot is
acceptable since a server may be running for months without a reboot.
> Select from large lob table with embedded gives OutOfMemoryError
> ----------------------------------------------------------------
>
> Key: DERBY-3354
> URL: https://issues.apache.org/jira/browse/DERBY-3354
> Project: Derby
> Issue Type: Bug
> Components: SQL
> Affects Versions: 10.3.1.4, 10.3.2.1, 10.4.0.0
> Reporter: Kathey Marsden
> Assignee: Anurag Shekhar
> Attachments: derby-3354.diff, derby-3354_preview.diff, LocLeak.java
>
>
> Retrieving from a large table with lobs gives an OutOfMemoryException, even
> if free() is explictly called on the lob. I believe this is because
> EmbedConnection.addLobMapping is called for every lob creation but is never
> cleared until commit or rollback, even if the lob is freed.
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