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https://issues.apache.org/jira/browse/SOLR-7777?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14623967#comment-14623967
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Yonik Seeley commented on SOLR-7777:
------------------------------------

I just did a quick test with facet.method=enum, and everything seems to work 
fine.
So I think this bug only manifests with another bug (namley, badly behaved 
keys/queries that get changed once they are inserted into the cache).
My guess at this point is that the remove code does a lookup and fails to find 
the entry (since the hashcode changed and it's in the wrong bucket).

> FastLRUCache size keeps growing
> -------------------------------
>
>                 Key: SOLR-7777
>                 URL: https://issues.apache.org/jira/browse/SOLR-7777
>             Project: Solr
>          Issue Type: Bug
>    Affects Versions: Trunk
>            Reporter: Yonik Seeley
>
> cut-n-paste from admin console:
> {code}
>  filterCache
>     class:
>         org.apache.solr.search.FastLRUCache
>     version:
>         1.0
>     description:
>         Concurrent LRU Cache(maxSize=128, initialSize=128, minSize=115, 
> acceptableSize=121, cleanupThread=false)
>     src:
>         null
>     stats:
>         lookups:
>             2915
>         hits:
>             514
>         hitratio:
>             0.18
>         inserts:
>             2401
>         evictions:
>             239
>         size:
>             2162
>         warmupTime:
>             0
>         cumulative_lookups:
>             2915
>         cumulative_hits:
>             514
>         cumulative_hitratio:
>             0.18
>         cumulative_inserts:
>             2401
>         cumulative_evictions:
>             239
> {code}



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