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While starting hadoop services, datanode service is not running?

Question Posted / Hirendra Kumar

Answer Posted / Hirendra Kumar

To troubleshoot a situation where the DataNode service isn't running after starting Hadoop services, you can check the logs (usually in /tmp/hadoop-<servicename>/logs) for any error messages. Ensure that there are no configuration issues and that the necessary ports (50010, 50020, 50075, and 8020) are open and accessible.

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