[jira] [Created] (MESOS-1740) Bad error message when docker containerizer isn't enabled

["Jay Buffington (JIRA)" <ji...@apache.org>]

Jay Buffington created MESOS-1740:
-------------------------------------

             Summary: Bad error message when docker containerizer isn't enabled
                 Key: MESOS-1740
                 URL: https://issues.apache.org/jira/browse/MESOS-1740
             Project: Mesos
          Issue Type: Bug
          Components: containerization
            Reporter: Jay Buffington
            Assignee: Timothy Chen
            Priority: Minor


If I set container in TaskInfo's executor (aka DockerInfo) but I do not start the slave with {{--containerizer=docker,...}} then I get this error message in the log:

{noformat}
E0827 17:53:16.422735 20090 slave.cpp:2491] Container 'xxx' for executor 'yyy' of framework 'zzz' failed to start: TaskInfo/ExecutorInfo not supported
{noformat}

A better error message would have been:
{noformat}
No enabled containerizers could create a container for the provided TaskInfo/ExecutorInfo message.  Enabled containerizers are: mesos.
{noformat}

An even better error message would have been:
{noformat}
DockerInfo was sent, but docker containerizer is not enabled.  Try adding --containerizer=docker,... to command line args
{noformat}





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