Actions is successful but it doesn't apply the changeset

[AyoubOukh]

Hello,
We are seeing an issue where the action runs successfully but it doesn't apply the changeset, and therefore the changeset is not deleted - which causes errors in the following deployments:
ChangeSet ****-CS cannot be created due to a mismatch with existing attribute Template
This was quite unclear to debug, but I am positive that the previous run was successful and the changeset wasn't applied, although the CS was successfully created.

      - name: Deploy to AWS CloudFormation
        id: cloudformation_deploy_stacks
        uses: aws-actions/aws-cloudformation-github-deploy@v1
        with:
          name: ${{ matrix.pipelines.stack }}
          template: https://s3.amazonaws.com/${{ env.S3_BUCKET }}/${{ matrix.pipelines.stack }}/cfn-template.packaged.yml
          parameter-overrides: file://${{ matrix.pipelines.path }}/config/config.json
          capabilities: CAPABILITY_IAM,CAPABILITY_NAMED_IAM,CAPABILITY_AUTO_EXPAND

[CraigHead]

I am also running into this. Except my exception is ChangeSet ****-CS cannot be created due to a mismatch with existing attribute Parameters. The behavior is the same. There is a changeset that is created but not executed. Also the changeset is not deleted ephemerally. When the stack gets into this state, future deployments are prevented from happening until someone manually cleans up the dirty Changeset.

IMHO this try-catch should really be a try-finally. https://github.com/aws-actions/aws-cloudformation-github-deploy/blob/master/src/deploy.ts#L85

[albertodiazdorado-tng]

So how are you fixing the problem? Manually deleting the non-applied changeset from CloudFormation?

[jhult]

Any update on this? We just bumped into it (mismatch with existing attribute Parameters).