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https://issues.apache.org/jira/browse/SOLR-5808?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14014530#comment-14014530
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Shalin Shekhar Mangar commented on SOLR-5808:
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I just ran into this as well. A large segment on a 500M doc index (12GB heap)
took down the node. I'll investigate and try to reduce the memory requirements.
> collections?action=SPLITSHARD running out of heap space due to large segments
> -----------------------------------------------------------------------------
>
> Key: SOLR-5808
> URL: https://issues.apache.org/jira/browse/SOLR-5808
> Project: Solr
> Issue Type: Bug
> Components: update
> Affects Versions: 4.7
> Reporter: Will Butler
> Assignee: Shalin Shekhar Mangar
> Labels: outofmemory, shard, split
>
> This issue is related to [https://issues.apache.org/jira/browse/SOLR-5214].
> Although memory issues due to merging have been resolved, we still run out of
> memory when splitting a shard containing a large segment (created by
> optimizing). The Lucene MultiPassIndexSplitter is able to split the index
> without error.
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