core-site.xml does not exists!

It seems like you are encountering an issue with the Hadoop configuration file core-site.xml. This file is an essential part of the Hadoop configuration and is required for Hadoop to function properly.

To resolve this issue, you need to check if the core-site.xml file exists in the Hadoop configuration directory. If it does not exist, then you need to create it manually and configure it with the necessary properties.

Here are the steps to create the core-site.xml file:

1. Navigate to the Hadoop configuration directory on your system.
2. Create a new file named core-site.xml.
3. Open the file in a text editor and add the following content:

<configuration>
  <property>
    <name>fs.defaultFS</name>
    <value>hdfs://localhost:9000</value>
  </property>
</configuration>

4. Save the file and exit the text editor.

Make sure to replace the value of fs.defaultFS with the appropriate Hadoop file system URL for your system.

Once you have created and configured the core-site.xml file, restart the Hadoop services to apply the changes.