private void checkSpecs(Job job)
throws ClassNotFoundException, InterruptedException, IOException {
JobConf jConf = (JobConf) job.getConfiguration();
// Check the output specification
//// default reduce num is 1 if do not set mapreduce.job.reduces.
//// if not set mapred.mapper.new-api, will use oldMapper API
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);
}
}
