How to submit a job to the Hadoop cluster?

To submit a Hadoop cluster job, you can follow the steps below:

1. Package your task code and related configuration files into an executable JAR file.
2. Submit a job using the Hadoop command-line tool hadoop jar. The basic syntax of this command is:
3. To run the main class in the specified JAR file using Hadoop, use the command “hadoop jar [args…]”
4. is the path to the JAR file you have packaged, is the full name of the main class that contains the main() method, and [args…] is the list of parameters passed to the main class.
5. If necessary, you can specify additional dependency JAR files using the -libjars option. For example:
6. Run the main class of the jar file using Hadoop, along with any necessary dependency jar files.
7. is the path for extra dependency JAR files, and multiple files can be separated by commas.
8. You can set Hadoop configuration parameters using the -D option. For example:
9. Run the jar file using Hadoop with the specified main class, setting a property to a certain value, and passing in any additional arguments.
10. is the name of the configuration property to be set, while represents the value of the property.
11. After submitting a task, Hadoop will distribute the task to available nodes in the cluster for execution. You can monitor the progress and results of the task using Hadoop’s web interface or command-line tools.

Before submitting the task, make sure that the Hadoop cluster is properly configured and that your code and configuration files are functioning correctly.