Help Center/ Huawei Cloud Astro Zero/ API Reference/ Appendixes/ API Rate Limiting Suggestions
Updated on 2025-08-14 GMT+08:00

API Rate Limiting Suggestions

Symptom

An API returns a "429 Too Many Requests" error, indicating that too many requests were sent in a short time, exceeding the API's rate limit. To solve this issue, you can reduce the request sending frequency, increase the request timeout, perform retries based on the exponential backoff strategy, and check request parameters and headers.

Solutions

  1. Reducing request frequency: The most straightforward solution is to decrease the frequency of requests sent by the client. Adjust your application (for example, by increasing client-side caches) to send requests at reasonable intervals based on the API's rate limit, avoiding bursts of requests in a short period.
  2. Increasing request timeout: If API requests require long processing time, increase the client-side request timeout to allow sufficient time for the server to complete processing. This helps prevent the 429 error caused by timeouts.
  3. Using exponential backoff for retries: When encountering the 429 error, avoid immediate retries. Instead, implement an exponential backoff strategy. Wait a short time (for example, 1 second) after the first failed retry. Wait longer (for example, 2 seconds) for the second retry. Wait even longer (for example, 4 seconds) for the third retry, and so on, until the retry is successful or the maximum allowed limit on retries has been reached.
  4. Checking request parameters and headers: Ensure the request parameters and headers are correct to avoid server-side processing errors due to invalid inputs.

By implementing these solutions, you will effectively resolve the "429 Too Many Requests" error and ensure normal application running.