From e398f4e930978b42d8edde852cb890bf14304f26 Mon Sep 17 00:00:00 2001
From: Michael McCandless <mikemccand@apache.org>
Date: Thu, 4 Sep 2008 11:14:04 +0000
Subject: [PATCH] LUCENE-1376: catch BG merge exceptions even if all merges
 finish before FG thread (running optimize) advances to while loop

git-svn-id: https://svn.apache.org/repos/asf/lucene/java/trunk@691964 13f79535-47bb-0310-9956-ffa450edef68
---
 src/java/org/apache/lucene/index/IndexWriter.java | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/src/java/org/apache/lucene/index/IndexWriter.java b/src/java/org/apache/lucene/index/IndexWriter.java
index 7e1bf262d6f..fc88fd49c40 100644
--- a/src/java/org/apache/lucene/index/IndexWriter.java
+++ b/src/java/org/apache/lucene/index/IndexWriter.java
@@ -2333,9 +2333,7 @@ public class IndexWriter {
 
     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 @@ public class IndexWriter {
               }
             }
           }
+
+          if (optimizeMergesPending())
+            doWait();
+          else
+            break;
         }
       }