Hongyuan Li created MAPREDUCE-7186:
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Summary: JobSubmitter#checkSpecs doesn not judge whether
reduceNums is less than zero.
Key: MAPREDUCE-7186
URL: https://issues.apache.org/jira/browse/MAPREDUCE-7186
Project: Hadoop Map/Reduce
Issue Type: Bug
Components: client
Reporter: Hongyuan Li
JobSubmitter#checkSpecs doesn not judge whether reduceNums is less than zero.
{code:java}
private void checkSpecs(Job job) throws ClassNotFoundException,
InterruptedException, IOException {
JobConf jConf = (JobConf)job.getConfiguration();
// Check the output specification
if (jConf.getNumReduceTasks() == 0 ?
jConf.getUseNewMapper() : jConf.getUseNewReducer()) {
org.apache.hadoop.mapreduce.OutputFormat<?, ?> output =
ReflectionUtils.newInstance(job.getOutputFormatClass(),
job.getConfiguration());
output.checkOutputSpecs(job);
} else {
jConf.getOutputFormat().checkOutputSpecs(jtFs, jConf);
}
}
{code}
The code does handle the situation when reduceTaskNums is set to -1 or any
other value less than zero.
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