Yandex Cloud
Search
Contact UsTry it for free
  • Customer Stories
  • Documentation
  • Blog
  • All Services
  • System Status
    • Featured
    • Infrastructure & Network
    • Data Platform
    • AI for business
    • Security
    • DevOps tools
    • Serverless
    • Monitoring & Resources
  • All Solutions
    • By industry
    • By use case
    • Economics and Pricing
    • Security
    • Technical Support
    • Start testing with double trial credits
    • Cloud credits to scale your IT product
    • Gateway to Russia
    • Cloud for Startups
    • Center for Technologies and Society
    • Yandex Cloud Partner program
    • Price calculator
    • Pricing plans
  • Customer Stories
  • Documentation
  • Blog
© 2025 Direct Cursus Technology L.L.C.
All solutions
    • All solutions for Cloud Functions
    • Resolving the `CORS` error when accessing the SpeechKit, Vision OCR, or Translate API from a web application frontend
    • Resolving HTTP 499 errors when working with a cloud function or Serverless Containers container
    • Troubleshooting the connection to YDB from Cloud Functions function code
    • Resolving the `No node can serve the request (Too many reschedules)` error
    • Resolving the `No node can serve the request (concurrent requests exceeded)` error
    • How to get the number of function calls for a certain period
    • How to access a function from MDB
    • How to set up a static IP address
    • How to call cloud functions asynchronously
    • How to set up `boto3` authentication

In this article:

  • Issue description
  • Solution
  • If the issue persists
  1. Cloud Functions
  2. Troubleshooting the connection to YDB from Cloud Functions function code

Troubleshooting connecting to YDB from Cloud Functions function code

Written by
Yandex Cloud
Updated at December 17, 2025
  • Issue description
  • Solution
  • If the issue persists

Issue descriptionIssue description

When you call a Cloud Functions function after creating its new revision, the connection to YDB is no longer established.

SolutionSolution

Newer versions of the YDB SDK require you to explicitly provide an authorization token. Earlier YDB SDK versions did not have this requirement.

Add the ydb==2.13.3 line to requirements.txt, create another revision of your function, call the function again, and check whether the connection to YDB is successful.

If the issue persistsIf the issue persists

If the above actions did not help, create a support ticket. Provide the following information in your ticket:

  1. Cloud function ID.
  2. Full text of the YDB connection error message from the function log.

Was the article helpful?

Previous
Resolving HTTP 499 errors when working with a cloud function or Serverless Containers container
Next
Resolving the `No node can serve the request (Too many reschedules)` error
© 2025 Direct Cursus Technology L.L.C.