org.elasticsearch.index.shard

Class ShadowIndexShard

java.lang.Object

org.elasticsearch.index.shard.AbstractIndexShardComponent

org.elasticsearch.index.shard.IndexShard

org.elasticsearch.index.shard.ShadowIndexShard

All Implemented Interfaces:

IndexShardComponent

public final class ShadowIndexShard
extends IndexShard

ShadowIndexShard extends IndexShard to add file synchronization from the primary when a flush happens. It also ensures that a replica being promoted to a primary causes the shard to fail, kicking off a re-allocation of the primary shard.

Field Summary

Fields inherited from class org.elasticsearch.index.shard.IndexShard

currentEngineReference, engineFactory, INDEX_FLUSH_ON_CLOSE, INDEX_REFRESH_INTERVAL, shardRouting, state

Fields inherited from class org.elasticsearch.index.shard.AbstractIndexShardComponent

deprecationLogger, indexSettings, logger, shardId

Constructor Summary

Constructors

Constructor and Description

ShadowIndexShard(ShardId shardId, IndexSettingsService indexSettingsService, IndicesLifecycle indicesLifecycle, Store store, StoreRecoveryService storeRecoveryService, ThreadPool threadPool, MapperService mapperService, IndexQueryParserService queryParserService, IndexCache indexCache, IndexAliasesService indexAliasesService, IndicesQueryCache indicesQueryCache, ShardPercolateService shardPercolateService, CodecService codecService, ShardTermVectorsService termVectorsService, IndexFieldDataService indexFieldDataService, IndexService indexService, IndicesWarmer warmer, SnapshotDeletionPolicy deletionPolicy, SimilarityService similarityService, EngineFactory factory, ClusterService clusterService, ShardPath path, BigArrays bigArrays, IndexSearcherWrappingService wrappingService, IndexingMemoryController indexingMemoryController)

Method Summary

Methods

Modifier and Type	Method and Description
boolean	allowsPrimaryPromotion() Returns true iff this shard allows primary promotion, otherwise false
boolean	canIndex() returns true if this shard supports indexing (i.e., write) operations.
MergeStats	mergeStats()
protected Engine	newEngine(boolean skipInitialTranslogRecovery, EngineConfig config)
TranslogStats	translogStats()
void	updateRoutingEntry(ShardRouting newRouting, boolean persistState) In addition to the regular accounting done in IndexShard.updateRoutingEntry(org.elasticsearch.cluster.routing.ShardRouting, boolean), if this shadow replica needs to be promoted to a primary, the shard is failed in order to allow a new primary to be re-allocated.

Methods inherited from class org.elasticsearch.index.shard.IndexShard

acquireSearcher, addFailedEngineListener, checkIdle, close, commitStats, completionStats, create, decrementOperationCounter, delete, deleteShardState, docStats, engine, engineUnsafe, failShard, fieldData, fieldDataStats, finalizeRecovery, flush, flushStats, forceMerge, get, getActive, getIndexingBufferSize, getOperationsCount, getQueryCachingPolicy, getService, getStats, getSuggestMetric, getTranslogDurability, ignoreRecoveryAttempt, incrementOperationCounter, index, indexFieldDataService, indexingService, indexingStats, indexService, isFlushOnClose, mapperService, minimumCompatibleVersion, percolateRegistry, performBatchRecovery, performRecoveryRestart, performTranslogRecovery, postRecovery, prepareCreateOnPrimary, prepareCreateOnReplica, prepareDeleteOnPrimary, prepareDeleteOnReplica, prepareForIndexRecovery, prepareIndexOnPrimary, prepareIndexOnReplica, queryCacheStats, readAllowed, recoverFromStore, recovering, recovering, recoveryState, recoveryStats, refresh, refreshStats, relocated, requestCache, routingEntry, searchService, searchStats, segmentStats, shardBitsetFilterCache, shardPath, shardPercolateService, skipTranslogRecovery, snapshotIndex, state, store, storeStats, suggestStats, sync, syncFlush, termVectorsService, updateBufferSize, upgrade, verifyStarted, verifyStartedOrRecovering, warmerService, warmerStats

Methods inherited from class org.elasticsearch.index.shard.AbstractIndexShardComponent

indexSettings, nodeName, shardId

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ShadowIndexShard

@Inject
public ShadowIndexShard(ShardId shardId,
                       IndexSettingsService indexSettingsService,
                       IndicesLifecycle indicesLifecycle,
                       Store store,
                       StoreRecoveryService storeRecoveryService,
                       ThreadPool threadPool,
                       MapperService mapperService,
                       IndexQueryParserService queryParserService,
                       IndexCache indexCache,
                       IndexAliasesService indexAliasesService,
                       IndicesQueryCache indicesQueryCache,
                       ShardPercolateService shardPercolateService,
                       CodecService codecService,
                       ShardTermVectorsService termVectorsService,
                       IndexFieldDataService indexFieldDataService,
                       IndexService indexService,
                       @Nullable
                       IndicesWarmer warmer,
                       SnapshotDeletionPolicy deletionPolicy,
                       SimilarityService similarityService,
                       EngineFactory factory,
                       ClusterService clusterService,
                       ShardPath path,
                       BigArrays bigArrays,
                       IndexSearcherWrappingService wrappingService,
                       IndexingMemoryController indexingMemoryController)
                 throws IOException

Throws:

IOException

Method Detail

updateRoutingEntry

public void updateRoutingEntry(ShardRouting newRouting,
                      boolean persistState)

In addition to the regular accounting done in IndexShard.updateRoutingEntry(org.elasticsearch.cluster.routing.ShardRouting, boolean), if this shadow replica needs to be promoted to a primary, the shard is failed in order to allow a new primary to be re-allocated.

Overrides:

updateRoutingEntry in class IndexShard

mergeStats

public MergeStats mergeStats()

Overrides:

mergeStats in class IndexShard

canIndex

public boolean canIndex()

Description copied from class: IndexShard

returns true if this shard supports indexing (i.e., write) operations.

Overrides:

canIndex in class IndexShard

newEngine

protected Engine newEngine(boolean skipInitialTranslogRecovery,
               EngineConfig config)

Overrides:

newEngine in class IndexShard

allowsPrimaryPromotion

public boolean allowsPrimaryPromotion()

Description copied from class: IndexShard

Returns true iff this shard allows primary promotion, otherwise false

Overrides:

allowsPrimaryPromotion in class IndexShard

translogStats

public TranslogStats translogStats()

Overrides:

translogStats in class IndexShard