HubSpot/Singularity — pull request #365 by hgschmie (2014-12-12 00:56:02+00:00)
Title: Run the History persister only on the leading server.

(02:59:39 PM) wsorenson_hs_: i think some of the managed stuff needs to only run on the master
(02:59:54 PM) wsorenson_hs_: for instance the history persister

this changes the persister to only run on the leading master.