UPark API Error 500 Troubleshooting - Solar Faults | terminalfaults.org

Technical Background:

HTTP 500 errors indicate a server-side problem. This could be related to the API server being overloaded, a software bug in the API code, or a temporary network issue. TLS/SSL handshake failures can also manifest as 500 errors if the server is misconfigured or the client's certificate is invalid. API rate limiting, when exceeded, can also trigger this type of error.

Symptoms:

UPark API is returning HTTP 500 error codes during operation. User reports intermittent failures accessing API endpoints.

Possible Causes:

Exceeded API rate limits imposed by UPark.
Transient network connectivity issues between the kiosk and UPark servers.
Server-side error on the UPark API, such as a software bug or database issue.
Invalid or expired API authentication token.
TLS/SSL handshake failure due to certificate issues on the kiosk or server.
DNS resolution problems preventing the kiosk from reaching the UPark API server.

Solution:

1

Verify API rate limits: Examine the UPark API documentation for specified rate limits. Monitor API request frequency from the kiosk.
2

Implement API request throttling: Implement a queue or throttling mechanism in the kiosk software to manage API requests and prevent exceeding rate limits.
3

Check network connectivity: Use network diagnostic tools (e.g., ping, traceroute) from the kiosk to verify connectivity to the UPark API server.
4

Refresh API authentication token: Obtain a new API authentication token if the existing one is suspected to be invalid or expired.
5

Review server-side logs: If possible, access UPark API server logs to identify the specific cause of the 500 errors.
6

Clear DNS cache: Flush the DNS cache on the kiosk to ensure that the correct IP address for the UPark API server is being used.
7

Validate TLS/SSL configuration: Ensure that the kiosk has the correct root certificates installed and that the TLS/SSL configuration is compatible with the UPark API server.

Safety Warning:

This system operates in a public, unattended environment. All software modifications must be thoroughly tested in a controlled environment before deployment to the kiosk. Ensure all network connections are secure. Be aware of the potential for vandalism and tampering with the kiosk’s network settings. Ensure stable power supply to avoid unexpected shutdowns.

Prevention:

Regularly monitor API request rates from the kiosk. Implement robust error handling and logging in the kiosk software. Establish automated token refresh procedures. Periodically check the validity of SSL certificates.

Expert Tip:

Implement exponential backoff with jitter for API calls. If you receive a 500 error, wait a short, randomly increasing amount of time before retrying the request. This can help to alleviate the impact of transient server-side issues or rate limiting.

Frequently Asked Questions

•What are the specific API rate limits for the UPark API?

Consult the UPark API documentation or contact UPark support.

•How can I monitor the API request rate from the kiosk?

Implement logging within the kiosk application to track API requests and timestamps.

•What is the recommended TLS/SSL configuration for the UPark API?

Refer to the UPark API documentation or contact UPark support for recommended TLS/SSL settings.

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•What are the specific API rate limits for the UPark API?

•How can I monitor the API request rate from the kiosk?

•What is the recommended TLS/SSL configuration for the UPark API?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: