[SOLR-1798] Memory leak in FastLRUCache

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.4, 1.5
• Fix Version/s: 1.4.1, 1.5, 3.1, 4.0-ALPHA
• Component/s: search
• Labels: cache commit memory_leak search
• Assignee: Yonik Seeley
• Reporter: Laxman
• Created: 27/Feb/10 09:41
• Updated: 08/Jul/10 19:55
• Resolved: 06/Mar/10 22:49

Description

Every time a commit happens two Stats instances [org.apache.solr.common.util.ConcurrentLRUCache.Stats] are leaking.

Following code [org.apache.solr.search.FastLRUCache] to maintain cumulative cache statistics causing this Stats object leak.

    cumulativeStats = (List<ConcurrentLRUCache.Stats>) persistence;
    cumulativeStats.add(cache.getStats());

Everytime a commit happens a new cache object is getting created and its stats is added to the list which is not released at all.