ranger audit 报错Error! Error loading audit logs!!

There could be several reasons why you are experiencing this error with Ranger Audit. Here are a few possible causes and solutions:

Database Connection Issue: Check if the database connection details are correctly configured in the Ranger Admin properties file (usually ranger-admin-site.xml). Ensure that the database server is running, and the credentials are correct.
Database Schema Issue: Verify if the Ranger Audit database schema is created properly. You can use the db_setup.py script provided by Ranger to create the required tables and schema in the database.
Database Permissions Issue: Ensure that the user configured for Ranger Admin has the necessary permissions (e.g., create tables, insert data) on the Ranger Audit database.
Audit Properties Configuration Issue: Double-check the audit properties configuration in the Ranger Admin properties file. Make sure the audit log directory is correctly specified, and the necessary permissions are set for the Ranger Admin user to access that directory.
Log File Permissions Issue: Check the permissions of the audit log files. Ensure that the Ranger Admin user has read access to the audit log files and the directory containing them.
Log File Format Issue: Verify if the audit log files are in the expected format. Ranger supports various log file formats, such as JSON, CSV, and Solr. Make sure the log files are in the correct format specified in the audit properties.
Log File Location Issue: Ensure that the audit log files are present in the specified directory. If the logs are stored remotely, check if the network connectivity and access permissions are properly set.

If none of these solutions resolve the issue, you may need to check the Ranger Audit logs or the application logs (e.g., Ranger Admin logs) for more specific error messages that can help identify the root cause of the problem