intermediate regression test failures - At least one DBRoot required for that query is offline.

test suite 299 failed on nightly regression test. The error below was reported at the time of the failures. This error mean that after a system restart, ExeMgr didnt have a good connection with a PrimProc thinking that pm1 was down or it had an issue reading the dbroot to pm assignments, which lead to the error. And when this error occurs, all queries will fail until the system is restarted.

Aug 3 07:34:37 centos7 joblist[5536]: 37.749540 |2147483653|0|0| C 05 CAL0000: IDB-2034: At least one DBRoot required for that query is offline.