What should be done if the ResourceManager in Hadoop does not start?
If the ResourceManager in Hadoop is not started, you can try following these steps to resolve the issue:
- log files starting with yarn-yarn-resourcemanager-*.
- configuration file for YARN
- The address of the ResourceManager for YARN
- Address of the scheduler in the YARN ResourceManager.
- Check if the ResourceManager’s startup script is correct, and try restarting the ResourceManager.
- Ensure that other services that ResourceManager depends on (such as ZooKeeper) have been properly started and are accessible.
- If the issue still cannot be resolved, you can attempt to restart the entire Hadoop cluster to ensure all services are started correctly.
If the above methods still do not solve the problem, it is recommended to consult the official Hadoop documentation or seek help on the Hadoop community forum.