From 8c8500d1f8028725423a6f5905fdc5823c635c1b Mon Sep 17 00:00:00 2001
From: Michael McCandless <mikemccand@apache.org>
Date: Tue, 28 Apr 2009 15:12:53 +0000
Subject: [PATCH] make default exception handler in ConcurrentMergeHandler
 pause for 250 msec after each exception, to prevent saturating CPU

git-svn-id: https://svn.apache.org/repos/asf/lucene/java/trunk@769431 13f79535-47bb-0310-9956-ffa450edef68
---
 .../org/apache/lucene/index/ConcurrentMergeScheduler.java  | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/java/org/apache/lucene/index/ConcurrentMergeScheduler.java b/src/java/org/apache/lucene/index/ConcurrentMergeScheduler.java
index df5284bbfc4..1236528ce49 100644
--- a/src/java/org/apache/lucene/index/ConcurrentMergeScheduler.java
+++ b/src/java/org/apache/lucene/index/ConcurrentMergeScheduler.java
@@ -340,6 +340,13 @@ public class ConcurrentMergeScheduler extends MergeScheduler {
   /** Called when an exception is hit in a background merge
    *  thread */
   protected void handleMergeException(Throwable exc) {
+    try {
+      Thread.sleep(250);
+    } catch (InterruptedException ie) {
+      Thread.currentThread().interrupt();
+      // In 3.0 this will throw InterruptedException
+      throw new RuntimeException(ie);
+    }
     throw new MergePolicy.MergeException(exc, dir);
   }