Forum Discussion
Azure DevOps Releases are failing for all the repo all of sudden
Before 1st of Sept all the release succeeded without any issue , but all of sudden all the release pipelines are failing due to the below error.
Error:
2025-09-05T05:52:56.8522017Z error: error parsing STDIN: error converting YAML to JSON: yaml: mapping values are not allowed in this context
What could be the issue ?? Can anyone come across this issue, Please suggest.
1 Reply
Try this:
Validate Your YAML
Use a YAML linter like YAML Validator to catch hidden syntax issues.
Check for Recent Changes
- Review commits or pipeline changes made just before 1-September.
- Look for updated templates or variable definitions that might be malformed.
Test with Minimal Pipeline
Create a minimal pipeline with just a few steps to isolate the error. Gradually add back components to identify the breaking point.
Escape Variables Properly
If you're injecting variables into JSON or YAML blocks, wrap them in quotes:
value: "${{ variables.myJson }}"
