[jira] [Closed] (LUCENE-6316) LRUQueryCache eviction is slow

["Adrien Grand (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/LUCENE-6316?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Adrien Grand closed LUCENE-6316.
--------------------------------
    Resolution: Duplicate

I managed to reproduce the issue, this is caused by LUCENE-6321. What happens is that there is an eviction loop that looks like

{noformat}
while (cache_is_too_large()) {
  to_remove = least_recently_used_entry();
  cache.remove(to_remove);
}
{noformat}

However, the hash of the least-recently used entry has changed in the mean time, so the cache cannot find it, the removal fails and this loop becomes an infinite loop.

> LRUQueryCache eviction is slow
> ------------------------------
>
>                 Key: LUCENE-6316
>                 URL: https://issues.apache.org/jira/browse/LUCENE-6316
>             Project: Lucene - Core
>          Issue Type: Bug
>    Affects Versions: Trunk, 5.1
>            Reporter: Adrien Grand
>            Assignee: Adrien Grand
>             Fix For: Trunk, 5.1
>
>
> The stack traces upon timeout of http://jenkins.thetaphi.de/job/Lucene-Solr-5.x-Linux/11738/console suggest that evictions on LRUQueryCache are slow.



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