HADOOP-827. Disable speculative execution by default. Contributed by Owen.

git-svn-id: https://svn.apache.org/repos/asf/lucene/hadoop/trunk@487689 13f79535-47bb-0310-9956-ffa450edef68

CHANGES.txt

@@ -107,6 +107,9 @@ Release 0.9.2 - 2006-12-15
  1. HADOOP-639. Restructure InterTrackerProtocol to make task
     accounting more reliable.  (Arun C Murthy via cutting)
 
+ 2. HADOOP-827. Turn off speculative execution by default, since it's
+    currently broken.  (omalley via cutting)
+
 
 Release 0.9.1 - 2006-12-06
 

conf/hadoop-default.xml

@@ -455,9 +455,9 @@ creations/deletions), or "all".</description>
 
 <property>
   <name>mapred.speculative.execution</name>
-  <value>true</value>
-  <description>If true, then multiple instances of some map and reduce tasks may
-  be executed in parallel.</description>
+  <value>false</value>
+  <description>If true, then multiple instances of some map and reduce tasks 
+               may be executed in parallel.</description>
 </property>
 
 <property>