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https://issues.apache.org/jira/browse/SOLR-2947?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13167755#comment-13167755
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Mikhail Khludnev commented on SOLR-2947:
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bq.Is it your impression that DIH caching ever worked threaded, or do you think
SOLR-2382 might have broken it?
No. It didn't. Multiple threads don't work with CachedSqlEntityProcessor at 3.4
too.
bq. But I would think before that can happen all of these threaded bugs need to
be worked through.
ok. I'm going to address it.
> DIH caching bug - EntityRunner destroys child entity processor
> --------------------------------------------------------------
>
> Key: SOLR-2947
> URL: https://issues.apache.org/jira/browse/SOLR-2947
> Project: Solr
> Issue Type: Sub-task
> Components: contrib - DataImportHandler
> Affects Versions: 4.0
> Reporter: Mikhail Khludnev
> Labels: noob
> Fix For: 4.0
>
> Attachments: SOLR-2947.patch, SOLR-2947.patch,
> dih-cache-destroy-on-threads-fix.patch, dih-cache-threads-enabling-bug.patch
>
>
> My intention is fix multithread import with SQL cache. Here is the 2nd stage.
> If I enable DocBuilder.EntityRunner flow even for single thread, it breaks
> the pretty basic functionality: parent-child join.
> the reason is [line 473
> entityProcessor.destroy();|http://svn.apache.org/viewvc/lucene/dev/trunk/solr/contrib/dataimporthandler/src/java/org/apache/solr/handler/dataimport/DocBuilder.java?revision=1201659&view=markup]
> breaks children entityProcessor.
> see attachement comments for more details.
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