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Recommend disabling of speculative execution in defaults file.

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1 parent c5e8f24 commit 5eee8b557ae28c7bfdb65b50aa9e64ad2444355a @bwmcadams bwmcadams committed Jun 26, 2012
Showing with 9 additions and 0 deletions.
  1. +9 −0 mongo-defaults.xml
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9 mongo-defaults.xml
@@ -5,6 +5,15 @@
<name>mongo.job.verbose</name>
<value>false</value>
</property>
+ <!-- it is *strongly* recommended for consistent behavior that you disable speculative execution in hadoop -->
+ <property>
+ <name>mapred.map.tasks.speculative.execution</name>
+ <value>false</value>
+ </property>
+ <property>
+ <name>mapred.reduce.tasks.speculative.execution</name>
+ <value>false</value>
+ </property>
<property>
<!-- Run the job in the foreground and wait for response, or background it? -->
<name>mongo.job.background</name>

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