Due to etcd limits, secret and configmap (or any object) size is limited to 1.5Mb (default).

Meaning, that if the overall size of spec files for a workflow deployed by a CR is too big, applying the config map will fail with:

→ oc apply -f manifests/01-configmap_01-ticket-escalation-resources.yaml
Error from server (RequestEntityTooLarge): error when creating "manifests/01-configmap_01-ticket-escalation-resources.yaml": Request entity too large: limit is 3145728

The configmap from the example above, used 

kn-workflow gen-manifests

 to generate a workflow when the file https://developer.atlassian.com/cloud/jira/platform/swagger-v3.v3.json was stored in the specs folder and wrapped into the generated configmap file.