Package org.apache.solr.cloud

Classes for dealing with ZooKeeper when operating in SolrCloud mode.

See: Description

Interface Summary

Interface	Description
ActionThrottle.NanoTimeSource
OverseerMessageHandler	Interface for processing messages received by an OverseerTaskProcessor
OverseerMessageHandler.Lock
OverseerTaskProcessor.OverseerMessageHandlerSelector	An interface to determine which OverseerMessageHandler handles a given message.
RecoveryStrategy.RecoveryListener

Class Summary

Class	Description
ActionThrottle
Assign
CloudConfigSetService
CloudDescriptor
CloudUtil
CurrentCoreDescriptorProvider	Provide the current list of registered CoreDescriptors.
DistributedMap	A distributed map.
DistributedQueue	A distributed queue.
ElectionContext
LeaderElector	Leader Election process.
LeaderInitiatedRecoveryThread	Background daemon thread that tries to send the REQUESTRECOVERY to a downed replica; used by a shard leader to nag a replica into recovering after the leader experiences an error trying to send an update request to the replica.
LockTree	This is a utility class that offers fine grained locking for various Collection Operations This class is designed for single threaded operation.
Overseer	Cluster leader.
Overseer.FailedOp
Overseer.Stat
Overseer.Stats	Used to hold statistics about overseer operations.
OverseerAutoReplicaFailoverThread	In this simple initial implementation we are limited in how quickly we detect a failure by a worst case of roughly zk session timeout + WAIT_AFTER_EXPIRATION_SECONDS + WORK_LOOP_DELAY_MS and best case of roughly zk session timeout + WAIT_AFTER_EXPIRATION_SECONDS.
OverseerCollectionConfigSetProcessor	An OverseerTaskProcessor that handles: 1) collection-related Overseer messages 2) configset-related Overseer messages
OverseerCollectionMessageHandler	A OverseerMessageHandler that handles Collections API related overseer messages.
OverseerConfigSetMessageHandler	A OverseerMessageHandler that handles ConfigSets API related overseer messages.
OverseerNodePrioritizer	Responsible for prioritization of Overseer nodes, for example with the ADDROLE collection command.
OverseerSolrResponse
OverseerTaskProcessor	A generic processor run in the Overseer, used for handling items added to a distributed work queue.
OverseerTaskQueue	A DistributedQueue augmented with helper methods specific to the overseer task queues.
OverseerTaskQueue.QueueEvent
RecoveryStrategy
SizeLimitedDistributedMap	A size limited distributed map maintained in zk.
SolrZkServer
SyncStrategy
ZkCLI
ZkController	Handle ZooKeeper interactions.
ZkSolrResourceLoader	ResourceLoader that works with ZooKeeper.
ZkSolrResourceLoader.ZkByteArrayInputStream

Exception Summary

Exception	Description
ZkController.NotLeaderException	Thrown during leader initiated recovery process if current node is not leader
ZkController.ResourceModifiedInZkException

Package org.apache.solr.cloud Description

Classes for dealing with ZooKeeper when operating in SolrCloud mode.