CannotGetJdbcConnectionException Could not get JDBC Connection; nested exception is comalibabadruidpoolGetConnectionTimeoutException wait millis 300 active 0

This error message indicates that the application was unable to establish a JDBC connection with the database. The nested exception suggests that the connection pool was unable to provide a connection within the specified time limit (300 milliseconds) and that there were no active connections available.

There are several possible reasons for this error, including:

1. The database server is down or unreachable.
2. The application is configured with incorrect database connection details (e.g., wrong username or password).
3. The maximum number of connections in the connection pool has been reached, and no more connections are available.
4. The connection pool is misconfigured, causing it to fail to provide connections when requested.

To resolve this issue, you should check the following:

1. Ensure that the database server is up and running and is reachable from the application server.
2. Verify that the application is using the correct database connection details.
3. Increase the maximum number of connections in the connection pool configuration.
4. Check the connection pool configuration and ensure that it is correctly configured.

If the issue persists, you may need to consult the application server logs or the database server logs to identify the root cause of the problem