Control Panel UI

The Control Panel shows a section for each instance in the ensemble. Each section shows detailed status of the instance and provides several controls for the instance.

Status

Status	Description
Server Id	The Server Id set in the Configuration. If this instance is unlisted, the Server Id is -1.
Hostname	This instance’s hostname.
Status	(see status types below)

Status Types

Type	Description
Latent	Status isn’t known
Down	ZooKeeper is not running
Not Serving	ZooKeeper is running, but can’t communicate with the rest of the ensemble
Unlisted Down	ZooKeeper is not running, the instance is unlisted and the Restarts When Unlisted switch is off
No Restarts Down	ZooKeeper is not running and the Automatic Instance Restarts switch is off

Switches

Switch	Description
Automatic Instance Restarts	If Exhibitor determines that ZooKeeper is not running, it will try to restart it.
Log Cleanup Task	Exhibitor will periodically run the ZooKeeper log cleanup task.
Restarts When Unlisted	“Unlisted” means that the instance is not listed in the Servers list in the current Configuration. This switch controls whether automatic restarts apply when this instance is unlisted.
Backup Logs Task	Exhibitor will periodically backup the ZooKeeper transaction logs.

Control Buttons

Button	Description
Restart/Stop	Stops the ZooKeeper server if it’s running. If Automatic Instance Restarts is on, the ZooKeeper server will also get restarted.
4LTR	Shows a dialog that allows running a ZooKeeper four-letter-word against the server.
Log	Shows the Exhibitor log for the instance.