This is inspired by this forum post. We propose to add the ability to update the server-side SLA of an already submitted job dynamically. This could be done via JMX, by adding a method updateJobSLA(String jobUuid, JobSLA newSLA) to the DriverJobManagementMBean interface. In fact, instead of (or in addition to) a single job uuid at a time, we could use a generalized job selector/filter like this:

public interface JobSelector extends Serializable {
  boolean accepts(String jobUuid, String jobName, JobSLA currentSLA, JobMetadata currentMetadata);
}

Then we can add a method like thisd to the mbean:

updateJobSLA(JobSelector selector, JobSLA newSLA)

While we're at it, we could do the same with the job metadata:

updateJobSLA(JobSelector selector, JobSLA newSLA, JobMetadata newMetadata)

A null value for the new sla or metadata would means it shouldn't be changed. This way, it's possible to update both of them atomically.