ENG-5612: Add checks for shutdown.
ENG-5612: make error.
Merge branch 'master' into ENG-5612
ENG-5591: ...
ENG-5612: Crash on inturrepted.
Merge branch 'master' into ENG-5612
Merge pull request #1080 from VoltDB/ENG-5612

Eng 5612
Merge branch 'master' into ENG-5708