From 02e285f6ce14df617a39be3f7d789a9e545d00ec Mon Sep 17 00:00:00 2001
From: Robert Muir <rmuir@apache.org>
Date: Thu, 27 Jun 2013 16:22:31 +0000
Subject: [PATCH] randomize CMS a little bit

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1497422 13f79535-47bb-0310-9956-ffa450edef68
---
 .../src/java/org/apache/lucene/util/LuceneTestCase.java    | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/lucene/test-framework/src/java/org/apache/lucene/util/LuceneTestCase.java b/lucene/test-framework/src/java/org/apache/lucene/util/LuceneTestCase.java
index 9ab18a1ed89..30550328554 100644
--- a/lucene/test-framework/src/java/org/apache/lucene/util/LuceneTestCase.java
+++ b/lucene/test-framework/src/java/org/apache/lucene/util/LuceneTestCase.java
@@ -737,6 +737,13 @@ public abstract class LuceneTestCase extends Assert {
 
     if (r.nextBoolean()) {
       c.setMergeScheduler(new SerialMergeScheduler());
+    } else if (rarely(r)) {
+      int maxThreadCount = _TestUtil.nextInt(random(), 1, 4);
+      int maxMergeCount = _TestUtil.nextInt(random(), maxThreadCount, maxThreadCount+4);
+      ConcurrentMergeScheduler cms = new ConcurrentMergeScheduler();
+      cms.setMaxMergeCount(maxMergeCount);
+      cms.setMaxThreadCount(maxThreadCount);
+      c.setMergeScheduler(cms);
     }
     if (r.nextBoolean()) {
       if (rarely(r)) {