Akira AJISAKA created MAPREDUCE-5906:
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Summary: Inconsistent configuration in property
"mapreduce.reduce.shuffle.input.buffer.percent"
Key: MAPREDUCE-5906
URL: https://issues.apache.org/jira/browse/MAPREDUCE-5906
Project: Hadoop Map/Reduce
Issue Type: Improvement
Reporter: Akira AJISAKA
Assignee: Akira AJISAKA
Priority: Minor
In MergeManagerImpl.java, the default value of
MRJobConfig.SHUFFLE_INPUT_BUFFER_PERCENT
(=mapreduce.reduce.shuffle.input.buffer.percent) looks 0.90.
{code}
final float maxInMemCopyUse =
jobConf.getFloat(MRJobConfig.SHUFFLE_INPUT_BUFFER_PERCENT, 0.90f);
{code}
However, the actual default value is 0.70 in mapred-default.xml.
{code}
<name>mapreduce.reduce.shuffle.input.buffer.percent</name>
<value>0.70</value>
{code}
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