How to resolve the issue of the HMaster automatically shutting down after starting HBase?

If HMaster automatically shuts down after HBase starts, there could be several possible reasons and solutions.

1. Insufficient memory: HMaster requires enough memory to run, if there is not enough memory, HMaster may automatically shut down. You can increase the available memory for the HBase environment, or check the system resource usage and release unnecessary memory.
2. Port conflict: HMaster needs to listen on a specified port for requests from other HBase components. If another process is occupying the port that HMaster requires, it may not start and will automatically shut down. You can use the command lsof -i: to check if the port is being used by another process and ensure that the port required by HMaster is not in use.
3. Configuration error: The configuration file of HBase may contain incorrect configuration parameters, causing HMaster to fail to start properly. You can check the HBase configuration file (such as hbase-site.xml) for accuracy and ensure all necessary configuration parameters are correctly set.
4. Log files: HBase log files (such as hbase.log) may contain error messages about HMaster shutting down. You can check the log files for more detailed information and take appropriate corrective actions based on the error messages.

Here are some common reasons and solutions, you can check them one by one according to specific situations. If the problem still persists, it is recommended to consult the official documentation or community forums of HBase for more detailed assistance.