Get Error Message from Reana

[JensKrumsieck]

If workflow execution fails on reana the client just messages ❌ Workflow execution failed.
Is it possible to get the error message from reana and provide it to the user?

[aleidel]

Could add the step where it did fail to the message e.g. Workflow failed at step get_weather (7/15) and print or save the workflow logs or status. Would also be possible to try to extract all errors from logs/status, but there is no "error message string"

[JensKrumsieck]

At least the step would hint the user what could have gone wrong.
Error message could may be complicated as there could a full stacktrace in the message?!
But something like "hey your get_weather script failed" should help 👍🏻
May be we need something to retrieve the logs of a failed workflow, like s4n execute remote status workflow_id or sth. (or just use reana-client for that^^)

[aleidel]

Tried to add this by searching for a step that did not complete in workflow status. In this case it says failed at step xy and prints the logs of the step. Sometimes a workflow step is marked as completed by reana even though the workflow failed and there is an error in that step. For this case there is a second workflow error "suggestion" if a step is completed but the logs of the step contain an error