Runtime Error

What This Error Means

This error occurs when the database connection pool has reached its maximum number of retries, indicating that the database connections are being exhausted.

Why It Happens

This error typically happens when there are too many concurrent database connections, or when the connection pool settings are not properly configured. It can also occur when the database server is overwhelmed or experiencing high latency.

How to Fix It

1. 1To fix this error, you can:
2. 21. Increase the maximum number of connections in the connection pool.
3. 32. Reduce the number of concurrent database connections.
4. 43. Optimize the database server configuration to improve performance.
5. 54. Implement a connection pooling strategy that allows for idle connections to be released.
6. 65. Check for and resolve any database issues that may be causing high latency or server overload.

Example Code Solution

CREATE TABLE users (
  id INT PRIMARY KEY,
  username VARCHAR2(50)
);

DECLARE
  cursor users_cur IS SELECT * FROM users;
  l_username VARCHAR2(50);
BEGIN
  FOR i IN 1..1000 LOOP
    FETCH users_cur INTO l_username;
    INSERT INTO users (username) VALUES (l_username);
  END LOOP;
END;

CREATE TABLE users (
  id INT PRIMARY KEY,
  username VARCHAR2(50)
);

DECLARE
  cursor users_cur IS SELECT * FROM users;
  l_username VARCHAR2(50);
  l_cnt NUMBER := 0;
BEGIN
  FOR i IN 1..1000 LOOP
    FETCH users_cur INTO l_username;
    IF l_username IS NOT NULL THEN
      INSERT INTO users (username) VALUES (l_username);
      l_cnt := l_cnt + 1;
      IF l_cnt > 100 THEN
        COMMIT;
        l_cnt := 0;
      END IF;
    END IF;
  END LOOP;
  COMMIT;
END;