Uses of Class
org.apache.hadoop.hdfs.server.federation.router.PeriodicService

Packages that use PeriodicService

Package	Description
org.apache.hadoop.hdfs.server.federation.router	The router package includes the core services for a HDFS federation router.
org.apache.hadoop.hdfs.server.federation.store	The federation state store tracks persistent values that are shared between multiple routers.

Uses of PeriodicService in org.apache.hadoop.hdfs.server.federation.router

Subclasses of PeriodicService in org.apache.hadoop.hdfs.server.federation.router

Modifier and Type	Class	Description
class	NamenodeHeartbeatService	The Router periodically checks the state of a Namenode (usually on the same server) and reports their high availability (HA) state and load/space status to the StateStoreService .
class	RouterHeartbeatService	Service to periodically update the Router current state in the State Store.
class	RouterQuotaUpdateService	Service to periodically update the RouterQuotaUsage cached information in the Router.
class	RouterSafemodeService	Service to periodically check if the StateStoreService cached information in the Router is up to date.

Uses of PeriodicService in org.apache.hadoop.hdfs.server.federation.store

Subclasses of PeriodicService in org.apache.hadoop.hdfs.server.federation.store

Modifier and Type	Class	Description
class	StateStoreCacheUpdateService	Service to periodically update the StateStoreService cached information in the Router.
class	StateStoreConnectionMonitorService	Service to periodically monitor the connection of the StateStore StateStoreService data store and to re-open the connection to the data store if required.