Index: src/java/org/apache/lucene/index/IndexWriter.java
===================================================================
--- src/java/org/apache/lucene/index/IndexWriter.java	(revision 691951)
+++ src/java/org/apache/lucene/index/IndexWriter.java	(working copy)
@@ -2333,9 +2333,7 @@
 
     if (doWait) {
       synchronized(this) {
-        while(optimizeMergesPending()) {
-          doWait();
-
+        while(true) {
           if (mergeExceptions.size() > 0) {
             // Forward any exceptions in background merge
             // threads to the current thread:
@@ -2351,6 +2349,11 @@
               }
             }
           }
+
+          if (optimizeMergesPending())
+            doWait();
+          else
+            break;
         }
       }