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https://jira.duraspace.org/browse/DS-1205?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=25823#comment-25823
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Richard Rodgers commented on DS-1205:
-------------------------------------
Hi Lyncode & Tim:
I think there may be issues with this approach as is, since the Context cache
is not a performance (access) cache, but a 'transactional integrity' cache: its
job is to insure that when an object is requested more than once in a given
transaction scope, the database is not re-read (overwriting any pending - but
uncommitted - changes in the object). A regular caching approach like this
could evict objects with uncommitted changes in certain resource conditions.
Users of a Context currently have controls like clearing the entire cache, or
decaching specific objects ('item.deache()' ) when they know enough about the
transactional context to do so safely.
Thanks,
Richard
> DSpace org.dspace.core.Context caching problem
> ----------------------------------------------
>
> Key: DS-1205
> URL: https://jira.duraspace.org/browse/DS-1205
> Project: DSpace
> Issue Type: Bug
> Components: DSpace API
> Affects Versions: 1.8.2
> Reporter: DSpace @ Lyncode
> Priority: Blocker
> Labels: Core
> Fix For: 3.0
>
>
> bin/dspace script is crashing with OutOfMemory problems related with the
> org.dspace.core.Context HashMap.
> Proof: https://github.com/lyncode/DSpace/issues/5
> I think this is a critical problem, mainly because it does not make sense
> (for me) to have crashing applications because of caching mechanism memory
> overusage. As good practices for implementing caches, this cache mechanism
> could be aware of it's memory usage threshold, if reached, it could start
> discarding old and unused objects in it.
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