Function isBadConn

error.go:185–225

(err error, allowTimeout bool, addr string)

}

func isBadConn(err error, allowTimeout bool, addr string) bool {
	if err == nil {
		return false
	}

	// Check for context errors (works with wrapped errors)
	if errors.Is(err, context.Canceled) || errors.Is(err, context.DeadlineExceeded) {
		return true
	}

	// Check for pool timeout errors (works with wrapped errors)
	if errors.Is(err, pool.ErrConnUnusableTimeout) {
		return true
	}

	if isRedisError(err) {
		switch {
		case isReadOnlyError(err):
			// Close connections in read only state in case domain addr is used
			// and domain resolves to a different Redis Server. See #790.
			return true
		case isMovedSameConnAddr(err, addr):
			// Close connections when we are asked to move to the same addr
			// of the connection. Force a DNS resolution when all connections
			// of the pool are recycled
			return true
		default:
			return false
		}
	}

	if allowTimeout {
		// Check for network timeout errors (works with wrapped errors)
		var netErr net.Error
		if errors.As(err, &netErr) && netErr.Timeout() {
			return false
		}
	}

	return true
}

func isMovedError(err error) (moved bool, ask bool, addr string) {
	// Check for typed MovedError