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https://issues.apache.org/jira/browse/LUCENE-3953?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13246744#comment-13246744
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Des Lownds commented on LUCENE-3953:
------------------------------------
I would appreciate feedback on the attached patch, which uses a size limited
LinkedHashMap for innercache if the system property
"lucene.fieldCache.maxFields" is set. If the property is not set, system uses
old behavior.
> Using many dynamic fields in filters, sorts causes OOM
> ------------------------------------------------------
>
> Key: LUCENE-3953
> URL: https://issues.apache.org/jira/browse/LUCENE-3953
> Project: Lucene - Java
> Issue Type: Bug
> Components: core/search
> Affects Versions: 4.0
> Reporter: Des Lownds
> Attachments: FieldCacheLimitPatch.patch
>
>
> I have an index with ~1M documents, and many uniquely named fields. Each
> document only has a few fields populated, but there is a large set of dynamic
> fields across all docs. In other words, theres many sparse fields.
> Eventually the jvm will fall over due to OOM errors, because lucene's
> fieldCache grows without bounds. Adding more heap does not help.
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