Debugging "The step provided was invalid"

I'm trying to setup PHP unit testing for our PHP application using MariaDB as a "service".

Now, as soon as I declare that my step should use the service defined in "definitions" section the pipeline fails with the message "The step provided was invalid". Whenever I remove the service from the step it works.

According to my bitbucket-pipelines.yml is valid.

What am I doing wrong? What does the error mean? How can I debug that error?

I currently use the following bitbucket-pipelines.yml for testing:


  depth: 1
    - step:
        image: php:7.0-apache
          - ls
          - maria
      image: mariadb
        MYSQL_DATABASE: 'dev'  


1 answer

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Accepted answer


The issue is that you have an empty string for the value of the MYSQL_ROOT_PASSWORD. Pipelines fails to parse this as it is a string with no content.

An alternate way of setting the MYSQL_ROOT_PASSWORD variable to an empty string is to set MYSQL_ROOT_PASSWORD="\0".



Hi Philip,

Thanks for your response, I'll try that ASAP!

It would be nice if such conditions could be built into the validator (or is there some other documentation I missed?). I guess this would simplify things for you as well...



Hi Philip,

Since I receive a different error message now, it seems to work ;-)

Thanks again!


Ok, setting the MySQL password to "\0" did not work, instead I got the following error:

container_linux.go:247: starting container process caused "process_linux.go:320: reading syncT run type caused \"write parent: broken pipe\""

When I set a password (like 123456) it works.

Excellent! I'll open an internal issue for adding the validation logic. And I'll bring up the empty variable use-case with our PMs.

Glad to see you got things working. :)

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