Index: oak-segment-tar/src/main/java/org/apache/jackrabbit/oak/segment/SegmentNodeStoreService.java
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
--- oak-segment-tar/src/main/java/org/apache/jackrabbit/oak/segment/SegmentNodeStoreService.java	(date 1476128337000)
+++ oak-segment-tar/src/main/java/org/apache/jackrabbit/oak/segment/SegmentNodeStoreService.java	(date 1476696255000)
@@ -45,6 +45,7 @@
 import java.util.concurrent.TimeUnit;
 
 import com.google.common.base.Strings;
+import com.google.common.base.Supplier;
 import org.apache.felix.scr.annotations.Activate;
 import org.apache.felix.scr.annotations.Component;
 import org.apache.felix.scr.annotations.ConfigurationPolicy;
@@ -452,7 +453,7 @@
 
         // Expose an MBean to managing and monitoring garbage collection
 
-        FileStoreGCMonitor fsgcm = new FileStoreGCMonitor(Clock.SIMPLE);
+        final FileStoreGCMonitor fsgcm = new FileStoreGCMonitor(Clock.SIMPLE);
         registrations.add(new CompositeRegistration(
             whiteboard.register(GCMonitor.class, fsgcm, emptyMap()),
             registerMBean(
@@ -469,10 +470,16 @@
                 store.cancelGC();
             }
         };
+        Supplier<String> statusMessage = new Supplier<String>() {
+            @Override
+            public String get() {
+                return fsgcm.getStatus();
+            }
+        };
         registrations.add(registerMBean(
                 whiteboard,
                 RevisionGCMBean.class,
-                new RevisionGC(store.getGCRunner(), cancelGC, executor),
+                new RevisionGC(store.getGCRunner(), cancelGC, statusMessage, executor),
                 RevisionGCMBean.TYPE,
                 "Revision garbage collection"
         ));