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https://issues.apache.org/jira/browse/DAFFODIL-1879?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17087660#comment-17087660
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Steve Lawrence commented on DAFFODIL-1879:
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Full validation mode isn't currently allowed with a restored data processor, so
if we go the route of automatically save/reload (which personally feels a
little hacky), then we also need to figure out how to allow full validation to
work. That might mean also serialiing/deserialzing the Xeres validator
(DAFFODIL-1749).
To me, it feels like the best solution is to completely eliminate the pass by
name parameters (DAFFODIL-2325).
> Compilation related data structures cannot be garbage collected due to
> RuntimeData strong references
> ----------------------------------------------------------------------------------------------------
>
> Key: DAFFODIL-1879
> URL: https://issues.apache.org/jira/browse/DAFFODIL-1879
> Project: Daffodil
> Issue Type: Bug
> Components: Back End, Front End
> Reporter: Steve Lawrence
> Assignee: Steve Lawrence
> Priority: Major
>
> All the *RuntimeData and DPathCompileInfo constructors accept pass-by-name
> parameters. Some of the arguments passed into these constructors reference
> objects that are only needed for schema compilation (e.g. dsom, grammar,
> etc.). Because they are pass by name, these objects are strong reference and
> thus cannot be garbage collected, leading to the entire compilation state
> being store in memory.
> Fortunately, those parameters are marked as transient and so when serialized
> and deserialized they are effectively garbage collected. But if one does not
> save/reload a schema, lots of wasted memory used during schema compilation
> will stick around. Pass-by-name parameters cannot be vars, so the simple
> thing of making them vars and then setting to null does not work. These
> objects should be restructured to allow them to be garbage collected once
> compiled.
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