From b9a05a79384e748412c39bae4719f3237bf246e4 Mon Sep 17 00:00:00 2001
From: Robert Muir <rmuir@apache.org>
Date: Mon, 14 Jul 2014 10:47:02 +0000
Subject: [PATCH] LUCENE-5810: fix MDW logic around fsync, now that
 NRTCachingDirectory extends FilterDirectory

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1610382 13f79535-47bb-0310-9956-ffa450edef68
---
 .../src/java/org/apache/lucene/store/MockDirectoryWrapper.java | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lucene/test-framework/src/java/org/apache/lucene/store/MockDirectoryWrapper.java b/lucene/test-framework/src/java/org/apache/lucene/store/MockDirectoryWrapper.java
index bee82cc4fd0..941767b2ac3 100644
--- a/lucene/test-framework/src/java/org/apache/lucene/store/MockDirectoryWrapper.java
+++ b/lucene/test-framework/src/java/org/apache/lucene/store/MockDirectoryWrapper.java
@@ -192,6 +192,9 @@ public class MockDirectoryWrapper extends BaseDirectoryWrapper {
   private boolean mustSync() {
     Directory delegate = in;
     while (delegate instanceof FilterDirectory) {
+      if (delegate instanceof NRTCachingDirectory) {
+        return true;
+      }
       delegate = ((FilterDirectory) delegate).getDelegate();
     }
     return delegate instanceof NRTCachingDirectory;