MINOR: Fix NPE in controllerListeners from controller server

[dengziming]

Summary of testing strategy (including rationale)
for the feature or bug fix. Unit and/or integration
tests are expected for any behaviour change and
system tests should be considered for larger changes.

We can't start controller server if host is not set manually, this is similar to #10575.

Committer Checklist (excluded from commit message)

• Verify design and implementation
• Verify test coverage and CI build status
• Verify documentation (including upgrade notes)

[dengziming]

This bug is introduced from #14306 , ping @cmccabe and @showuon to have a look.

[showuon]

Will take a look this week.

[dengziming]

already fixed.