1. Identify the source of the PostgreSQL 38002 error:

SELECT * FROM pg_stat_activity WHERE state = 'idle in transaction';

2. Check the PostgreSQL log for more information about the error:

tail -f /var/log/postgresql/postgresql-.log

3. Check the PostgreSQL configuration settings to ensure they are correct:

SHOW ALL;

4. Check the PostgreSQL database for any locks or deadlocks:

SELECT * FROM pg_locks;

5. Check the PostgreSQL database for any long-running queries:

SELECT * FROM pg_stat_activity WHERE state = 'active';

6. If necessary, kill any long-running queries:

SELECT pg_cancel_backend(pid);

7. If necessary, restart the PostgreSQL server:

sudo service postgresql restart

8. Use an automated database observability tool to monitor and fix the PostgreSQL 38002 in question. Automated database observability tools can provide real-time insights into the performance and health of your PostgreSQL database, allowing you to quickly identify and fix any issues that may arise. Additionally, these tools can provide alerts when certain thresholds are exceeded, allowing you to take proactive measures to prevent future issues.