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Xiao Chen commented on MAPREDUCE-7186: -------------------------------------- I don't have permission for MR project on jira. You can try the dev mailing list for hadoop general or mapreduce, see [https://hadoop.apache.org/mailing_lists.html]. Someone should be able to help you there. > JobSubmitter#checkSpecs doesn not handle the situation when reduceNums is set > 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 > Priority: Minor > Attachments: MAPREDUCE-7186-001.patch, screenshot-1.png > > > 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. > When use hive, the "mapred.reduce.tasks" has a default value -1. > > !screenshot-1.png! -- This message was sent by Atlassian JIRA (v7.6.3#76005) --------------------------------------------------------------------- To unsubscribe, e-mail: mapreduce-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: mapreduce-issues-h...@hadoop.apache.org