HBASE-3278 AssertionError in LoadBalancer

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1040269 13f79535-47bb-0310-9956-ffa450edef68

src/main/java/org/apache/hadoop/hbase/master/LoadBalancer.java

@@ -293,7 +293,10 @@ public class LoadBalancer {
 
     long endTime = System.currentTimeMillis();
 
-    assert(regionidx == regionsToMove.size());
+    assert(regionidx == regionsToMove.size()): "clusterState=" + clusterState +
+      ", regionidx=" + regionidx + ", regionsToMove=" + regionsToMove +
+      ", numServers=" + numServers + ", serversOverloaded=" + serversOverloaded +
+      ", serversUnderloaded=" + serversUnderloaded;
     assert(neededRegions == 0);
 
     // All done!