5.2. Create HDFS Directories

You must create the following HDFS directories after you upgrade:

YARN NodeManager remote applications log
HDFS Job History

To create the YARN NodeManager remote applications log

Open /etc/hadoop/conf/yarn-site.xml.
Write down the value of the yarn.nodemanager.remote-app-log-dir so that you can use it in place of the ${yarn.nodemanager.remote-app-log-dir} variable in later examples. For example: ${yarn.nodemanager.remote-app-log-dir} = /app-logs

Create the ${yarn.nodemanager.remote-app-log-dir} in HDFS.

hdfs dfs -mkdir ${yarn.nodemanager.remote-app-log-dir}
hdfs dfs -chown -R yarn:hadoop ${yarn.nodemanager.remote-app-log-dir}
hdfs dfs -chmod -R 777 ${yarn.nodemanager.remote-app-log-dir}

Create a JobHistory directory in HDFS.
1. Open mapred-site.xml.
2. Write down the value of the mapreduce.jobhistory.done-dir so that you can use it in place of the ${mapreduce.jobhistory.done-dir} variable in later examples.
3. Write down the value of the mapreduce.jobhistory.intermediate-done-dir so that you can use it in place of the ${mapreduce.jobhistory.intermediate-done-dir} variable in later examples.
4. Create the JobHistory directories in HDFS.
```
hadoop dfs -mkdir ${mapreduce.jobhistory.done-dir}
hadoop dfs -mkdir ${mapreduce.jobhistory.intermediate-done-dir}
hadoop dfs -chown -R mapred:hadoop ${mapreduce.jobhistory.done-dir}
hadoop dfs -chown -R mapred:hadoop ${mapreduce.jobhistory.intermediate-done-dir}
hadoop dfs -chmod -R 777 ${mapreduce.jobhistory.done-dir}
hadoop dfs -chmod -R 777 ${mapreduce.jobhistory.intermediate-done-dir}
```
  Note
  You have to create the parent directories in HDFS by yourself. Grant the parent directories the same permissions.

	Note
You have to create the parent directories in HDFS by yourself. Grant the parent directories the same permissions.

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