OCI Autonomous Database: Persistent Connection implementing Python Using cx_Oracle
I'm stuck trying to This might be a silly question, but I'm working with persistent connection issues while trying to connect to an Oracle Autonomous Database (ADB) using Python and the cx_Oracle library... My connection string looks like this: ```python import cx_Oracle # Database credentials username = 'your_username' password = 'your_password' dsn = 'your_tns_alias' # Create a connection connection = cx_Oracle.connect(user=username, password=password, dsn=dsn) ``` However, I'm receiving the following behavior intermittently: `ORA-12514: TNS:listener does not currently know of service requested in connect descriptor`. I have verified that the ADB is up and running in the OCI console, and I can connect using SQL Developer without any issues. To troubleshoot, I've made sure the TNS alias is correctly defined in my `tnsnames.ora`, and I've tried both the full connection string and the TNS alias, but the scenario continues. I've also ensured that my cx_Oracle version is updated to 8.3.0 and that I have the Instant Client properly configured. I've tried implementing a retry mechanism in my code like this: ```python import time max_retries = 5 for attempt in range(max_retries): try: connection = cx_Oracle.connect(user=username, password=password, dsn=dsn) break # Exit the loop if successfully connected except cx_Oracle.DatabaseError as e: print(e) time.sleep(2) # Wait before retrying if attempt == max_retries - 1: print('Max retries reached, aborting.') ``` But even with retries, I still face the same behavior after a few successful connections. I'm unsure what else to check or how to ensure a stable connection to the OCI ADB. Has anyone experienced similar issues or have recommendations on how to resolve connection instability? How would you solve this? What's the best practice here? What would be the recommended way to handle this? This is my first time working with Python LTS. Hoping someone can shed some light on this. Any examples would be super helpful. This is my first time working with Python 3.10. Thanks for your help in advance!