sigram commented on a change in pull request #825: SOLR-13677 All Metrics 
Gauges should be unregistered by the objects that registered them
URL: https://github.com/apache/lucene-solr/pull/825#discussion_r312811895
 
 

 ##########
 File path: solr/core/src/java/org/apache/solr/search/FastLRUCache.java
 ##########
 @@ -227,6 +227,7 @@ public void warm(SolrIndexSearcher searcher, SolrCache 
old) {
 
   @Override
   public void close() {
+    if(metricsInfo != null) metricsInfo.unregister();
 
 Review comment:
   IIRC Apache code style inserts a space between `if` and condition.

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