While still waiting for INFRA to make this fixVersion mandatory, I created https://issues.apache.org/jira/issues/?filter=12337996 to track all JIRAs with no version information.
There're 360 JIRAs with fixVersion Empty, please review and put the correct version for your JIRA. I'll add version for all "resolved" or "closed" JIRA as these are likely already included in "*2.0.0.0-incubating*" Hope that'd clean up quite a few.
