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https://issues.apache.org/jira/browse/SOLR-14645?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17189774#comment-17189774
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Ishan Chattopadhyaya commented on SOLR-14645:
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Thanks [~mbolis], this was merged in the community package repo:
https://github.com/rohitbemax/dataimporthandler/pull/3
> Make FileListEntityProcessor streaming to prevent OOM
> -----------------------------------------------------
>
> Key: SOLR-14645
> URL: https://issues.apache.org/jira/browse/SOLR-14645
> Project: Solr
> Issue Type: Improvement
> Components: contrib - DataImportHandler
> Reporter: Marco Bolis
> Priority: Major
> Time Spent: 10m
> Remaining Estimate: 0h
>
> FileListEntityProcessor currently works by keeping the whole list of files to
> process in memory and iterating over it.
> If the list is very large (think some 100s of Ks) Solr goes OOM and crashes.
> Using Java 8 Streams and NIO2 it is possible to entirely avoid this behavior.
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