HBASE-3508. LruBlockCache statistics thread should have a name

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1068140 13f79535-47bb-0310-9956-ffa450edef68

CHANGES.txt

@@ -93,6 +93,7 @@ Release 0.90.1 - Unreleased
 
   IMPROVEMENTS
    HBASE-3470  Check that hbase-default.xml is loaded from within jar
+   HBASE-3508  LruBlockCache statistics thread should have a name
 
 Release 0.90.0 - January 19th, 2011
   INCOMPATIBLE CHANGES

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

@@ -37,6 +37,8 @@ import org.apache.hadoop.hbase.util.Bytes;
 import org.apache.hadoop.hbase.util.ClassSize;
 import org.apache.hadoop.util.StringUtils;
 
+import com.google.common.util.concurrent.ThreadFactoryBuilder;
+
 /**
  * A block cache implementation that is memory-aware using {@link HeapSize},
  * memory-bound using an LRU eviction algorithm, and concurrent: backed by a
@@ -111,7 +113,10 @@ public class LruBlockCache implements BlockCache, HeapSize {
 
   /** Statistics thread schedule pool (for heavy debugging, could remove) */
   private final ScheduledExecutorService scheduleThreadPool =
-    Executors.newScheduledThreadPool(1);
+    Executors.newScheduledThreadPool(1,
+      new ThreadFactoryBuilder()
+        .setNameFormat("LRU Statistics #%d")
+        .build());
 
   /** Current size of cache */
   private final AtomicLong size;