ERROR while getting the available backups

[balarampuli]

Hi Team,

I am building this exhibitor-1.6.0 to monitor zookeeper and seeing the following errors from log,
ERROR com.netflix.exhibitor.core.activity.ActivityLog Index Build: Getting available backups [ActivityQueue-1]
ERROR com.netflix.exhibitor.core.activity.ActivityLog Index Build: there are 0 available backups [ActivityQueue-1]

anybody knows what would be the root cause for it.

Regards,
Bala