User count cache queries itself during loading

"http-nio-2996-exec-14" #198 daemon prio=5 os_prio=0 tid=0x0a8ac800 nid=0x1d6 waiting on condition [0x4fa5a000]
   java.lang.Thread.State: WAITING (parking)
	at sun.misc.Unsafe.park(Native Method)
	- parking to wait for  <0x889676b8> (a com.google.common.util.concurrent.AbstractFuture$Sync)
	at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
...
	at com.atlassian.jira.application.DefaultApplicationRoleManager.getUserCount(DefaultApplicationRoleManager.java:409)
	at com.atlassian.jira.application.DefaultApplicationRoleManager.isRoleLimitExceeded(DefaultApplicationRoleManager.java:260)
	at com.atlassian.jira.application.DefaultApplicationRoleManager$ActiveUserCountLoader.lambda$countCoreUsers$1(DefaultApplicationRoleManager.java:744)
	at com.atlassian.jira.application.DefaultApplicationRoleManager$ActiveUserCountLoader$$Lambda$519/10282034.test(Unknown Source)
...
	at com.atlassian.jira.application.DefaultApplicationRoleManager$ActiveUserCountLoader.countCoreUsers(DefaultApplicationRoleManager.java:747)
	at com.atlassian.jira.application.DefaultApplicationRoleManager$ActiveUserCountLoader.countApplicationUsers(DefaultApplicationRoleManager.java:713)
	at com.atlassian.jira.application.DefaultApplicationRoleManager$ActiveUserCountLoader.lambda$load$0(DefaultApplicationRoleManager.java:705)
	at com.atlassian.jira.application.DefaultApplicationRoleManager$ActiveUserCountLoader$$Lambda$518/24388341.apply(Unknown Source)
	at com.atlassian.fugue.Option.map(Option.java:272)
	at com.atlassian.jira.application.DefaultApplicationRoleManager$ActiveUserCountLoader.load(DefaultApplicationRoleManager.java:705)
	at com.atlassian.jira.application.DefaultApplicationRoleManager$ActiveUserCountLoader.load(DefaultApplicationRoleManager.java:701)
...
	at com.atlassian.jira.application.DefaultApplicationRoleManager.getUserCount(DefaultApplicationRoleManager.java:409)