HBASE-4745 LRU statistics thread should be a daemon

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1197864 13f79535-47bb-0310-9956-ffa450edef68

CHANGES.txt

@@ -450,6 +450,7 @@ Release 0.92.0 - Unreleased
                (Roman Shposhnik)
    HBASE-4553  The update of .tableinfo is not atomic; we remove then rename
    HBASE-4725  NPE in AM#updateTimers
+   HBASE-4745  LRU statistics thread should be a daemon
 
   TESTS
    HBASE-4450  test for number of blocks read: to serve as baseline for expected

src/main/java/org/apache/hadoop/hbase/io/hfile/LruBlockCache.java

@@ -127,6 +127,7 @@ public class LruBlockCache implements BlockCache, HeapSize {
     Executors.newScheduledThreadPool(1,
       new ThreadFactoryBuilder()
         .setNameFormat("LRU Statistics #%d")
+        .setDaemon(true)
         .build());
 
   /** Current size of cache */