Hadoop giving java io IOException in mkdir Java code

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I placed my data set in the hdfs directory and now I am trying to execute a MapReduce code over the data. But while executing the MapReduce task, I am getting the error saying

Exception in thread "main" java.io.IOException: Mkdirs failed to create /tmp/output

    at org.apache.hadoop.util.RunJar.ensureDirectory(RunJar.java:106)

    at org.apache.hadoop.util.RunJar.main(RunJar.java:150)

But when I use -ls command I see the file already exists. Someone, please help me out?
May 3, 2018 in Big Data Hadoop by nitinrawat895
• 11,380 points
1,238 views

1 answer to this question.

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I am not sure about the issue. But generally, tmp folder in Hadoop doesn’t have permissions of all the users to create or execute. Kindly check the permission and either try to move the output folder to another directory or give the tmp directory the permission to create directory inside it.
answered May 3, 2018 by Shubham
• 13,480 points

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