[Solved] You try to submit a Hadoop job on Azure HDInsight using this command: hadoop jar example.jar com.example.WordCount input output But get an error: 'command not found'. What is the likely cause? | Hadoop

Hadoop - Modern Data Architecture with Hadoop

You try to submit a Hadoop job on Azure HDInsight using this command:

hadoop jar example.jar com.example.WordCount input output

But get an error: 'command not found'. What is the likely cause?

AThe input directory does not exist

BThe jar file 'example.jar' is missing

CHadoop is not installed or not in PATH on the HDInsight cluster

DThe output directory already exists

Step-by-Step Solution

Solution:

Step 1: Understand the error message
'command not found' means the shell cannot find the 'hadoop' command.
Step 2: Identify possible reasons
This usually happens if Hadoop is not installed or its binary path is not set in the environment PATH variable.
Final Answer:
Hadoop is not installed or not in PATH on the HDInsight cluster -> Option C
Quick Check:
'command not found' means missing executable in PATH [OK]

Quick Trick: Check if 'hadoop' command runs before job submission [OK]

Common Mistakes:

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