private void doFinish() {
if (finished.compareAndSet(false, true)) {
Releasables.close(indexShardReference);
final ShardId shardId = shardIt.shardId();
final ActionWriteResponse.ShardInfo.Failure[] failuresArray;
if (!shardReplicaFailures.isEmpty()) {
int slot = 0;
failuresArray = new ActionWriteResponse.ShardInfo.Failure[shardReplicaFailures.size()];
for (Map.Entry<String, Throwable> entry : shardReplicaFailures.entrySet()) {
RestStatus restStatus = ExceptionsHelper.status(entry.getValue());
failuresArray[slot++] =
new ActionWriteResponse.ShardInfo.Failure(
shardId.getIndex(),
shardId.getId(),
entry.getKey(),
entry.getValue(),
restStatus,
false);
}
} else {
failuresArray = ActionWriteResponse.EMPTY;
}
finalResponse.setShardInfo(
new ActionWriteResponse.ShardInfo(totalShards, success.get(), failuresArray));
listener.onResponse(finalResponse);
}
}
/**
* Checks whether we can perform a write based on the required active shard count setting. Returns
* **null* if OK to proceed, or a string describing the reason to stop
*/
protected String checkActiveShardCount() {
final ShardId shardId = primary.routingEntry().shardId();
final String indexName = shardId.getIndexName();
final ClusterState state = clusterStateSupplier.get();
assert state != null : "replication operation must have access to the cluster state";
final ActiveShardCount waitForActiveShards = request.waitForActiveShards();
if (waitForActiveShards == ActiveShardCount.NONE) {
return null; // not waiting for any shards
}
IndexRoutingTable indexRoutingTable = state.getRoutingTable().index(indexName);
if (indexRoutingTable == null) {
logger.trace("[{}] index not found in the routing table", shardId);
return "Index " + indexName + " not found in the routing table";
}
IndexShardRoutingTable shardRoutingTable = indexRoutingTable.shard(shardId.getId());
if (shardRoutingTable == null) {
logger.trace("[{}] shard not found in the routing table", shardId);
return "Shard " + shardId + " not found in the routing table";
}
if (waitForActiveShards.enoughShardsActive(shardRoutingTable)) {
return null;
} else {
final String resolvedShards =
waitForActiveShards == ActiveShardCount.ALL
? Integer.toString(shardRoutingTable.shards().size())
: waitForActiveShards.toString();
logger.trace(
"[{}] not enough active copies to meet shard count of [{}] (have {}, needed {}), scheduling a retry. op [{}], "
+ "request [{}]",
shardId,
waitForActiveShards,
shardRoutingTable.activeShards().size(),
resolvedShards,
opType,
request);
return "Not enough active copies to meet shard count of ["
+ waitForActiveShards
+ "] (have "
+ shardRoutingTable.activeShards().size()
+ ", needed "
+ resolvedShards
+ ").";
}
}
public XContentBuilder toXContent(XContentBuilder builder, Params params) throws IOException {
builder.startObject();
{
builder.startObject("shard");
{
builder.field("index", shard.getIndexName());
builder.field("index_uuid", shard.getIndex().getUUID());
builder.field("id", shard.getId());
builder.field("primary", primary);
}
builder.endObject(); // end shard
builder.field("assigned", this.assignedNodeId != null);
// If assigned, show the node id of the node it's assigned to
if (assignedNodeId != null) {
builder.field("assigned_node_id", this.assignedNodeId);
}
builder.field("shard_state_fetch_pending", this.hasPendingAsyncFetch);
// If we have unassigned info, show that
if (unassignedInfo != null) {
unassignedInfo.toXContent(builder, params);
builder.timeValueField(
"allocation_delay_in_millis",
"allocation_delay",
TimeValue.timeValueMillis(allocationDelayMillis));
builder.timeValueField(
"remaining_delay_in_millis",
"remaining_delay",
TimeValue.timeValueMillis(remainingDelayMillis));
}
builder.startObject("nodes");
for (NodeExplanation explanation : nodeExplanations.values()) {
explanation.toXContent(builder, params);
}
builder.endObject(); // end nodes
}
builder.endObject(); // end wrapping object
return builder;
}
public synchronized IndexShard createShard(ShardRouting routing) throws IOException {
final boolean primary = routing.primary();
/*
* TODO: we execute this in parallel but it's a synced method. Yet, we might
* be able to serialize the execution via the cluster state in the future. for now we just
* keep it synced.
*/
if (closed.get()) {
throw new IllegalStateException("Can't create shard " + routing.shardId() + ", closed");
}
final Settings indexSettings = this.indexSettings.getSettings();
final ShardId shardId = routing.shardId();
boolean success = false;
Store store = null;
IndexShard indexShard = null;
ShardLock lock = null;
try {
lock = nodeEnv.shardLock(shardId, TimeUnit.SECONDS.toMillis(5));
eventListener.beforeIndexShardCreated(shardId, indexSettings);
ShardPath path;
try {
path = ShardPath.loadShardPath(logger, nodeEnv, shardId, this.indexSettings);
} catch (IllegalStateException ex) {
logger.warn("{} failed to load shard path, trying to remove leftover", shardId);
try {
ShardPath.deleteLeftoverShardDirectory(logger, nodeEnv, lock, this.indexSettings);
path = ShardPath.loadShardPath(logger, nodeEnv, shardId, this.indexSettings);
} catch (Exception inner) {
ex.addSuppressed(inner);
throw ex;
}
}
if (path == null) {
// TODO: we should, instead, hold a "bytes reserved" of how large we anticipate this shard
// will be, e.g. for a shard
// that's being relocated/replicated we know how large it will become once it's done
// copying:
// Count up how many shards are currently on each data path:
Map<Path, Integer> dataPathToShardCount = new HashMap<>();
for (IndexShard shard : this) {
Path dataPath = shard.shardPath().getRootStatePath();
Integer curCount = dataPathToShardCount.get(dataPath);
if (curCount == null) {
curCount = 0;
}
dataPathToShardCount.put(dataPath, curCount + 1);
}
path =
ShardPath.selectNewPathForShard(
nodeEnv,
shardId,
this.indexSettings,
routing.getExpectedShardSize() == ShardRouting.UNAVAILABLE_EXPECTED_SHARD_SIZE
? getAvgShardSizeInBytes()
: routing.getExpectedShardSize(),
dataPathToShardCount);
logger.debug("{} creating using a new path [{}]", shardId, path);
} else {
logger.debug("{} creating using an existing path [{}]", shardId, path);
}
if (shards.containsKey(shardId.id())) {
throw new IndexShardAlreadyExistsException(shardId + " already exists");
}
logger.debug("creating shard_id {}", shardId);
// if we are on a shared FS we only own the shard (ie. we can safely delete it) if we are the
// primary.
final boolean canDeleteShardContent =
IndexMetaData.isOnSharedFilesystem(indexSettings) == false
|| (primary && IndexMetaData.isOnSharedFilesystem(indexSettings));
final Engine.Warmer engineWarmer =
(searcher) -> {
IndexShard shard = getShardOrNull(shardId.getId());
if (shard != null) {
warmer.warm(searcher, shard, IndexService.this.indexSettings);
}
};
store =
new Store(
shardId,
this.indexSettings,
indexStore.newDirectoryService(path),
lock,
new StoreCloseListener(
shardId, canDeleteShardContent, () -> eventListener.onStoreClosed(shardId)));
if (useShadowEngine(primary, indexSettings)) {
indexShard =
new ShadowIndexShard(
routing,
this.indexSettings,
path,
store,
indexCache,
mapperService,
similarityService,
indexFieldData,
engineFactory,
eventListener,
searcherWrapper,
threadPool,
bigArrays,
engineWarmer,
searchOperationListeners);
// no indexing listeners - shadow engines don't index
} else {
indexShard =
new IndexShard(
routing,
this.indexSettings,
path,
store,
indexCache,
mapperService,
similarityService,
indexFieldData,
engineFactory,
eventListener,
searcherWrapper,
threadPool,
bigArrays,
engineWarmer,
searchOperationListeners,
indexingOperationListeners);
}
eventListener.indexShardStateChanged(indexShard, null, indexShard.state(), "shard created");
eventListener.afterIndexShardCreated(indexShard);
shards = newMapBuilder(shards).put(shardId.id(), indexShard).immutableMap();
success = true;
return indexShard;
} catch (ShardLockObtainFailedException e) {
throw new IOException("failed to obtain in-memory shard lock", e);
} finally {
if (success == false) {
if (lock != null) {
IOUtils.closeWhileHandlingException(lock);
}
closeShard("initialization failed", shardId, indexShard, store, eventListener);
}
}
}
ASyncAction(
MultiPercolateRequest multiPercolateRequest,
List<Object> percolateRequests,
ActionListener<MultiPercolateResponse> finalListener,
ClusterState clusterState) {
this.finalListener = finalListener;
this.multiPercolateRequest = multiPercolateRequest;
this.percolateRequests = percolateRequests;
responsesByItemAndShard = new AtomicReferenceArray<>(percolateRequests.size());
expectedOperationsPerItem = new AtomicReferenceArray<>(percolateRequests.size());
reducedResponses = new AtomicArray<>(percolateRequests.size());
// Resolving concrete indices and routing and grouping the requests by shard
requestsByShard = new HashMap<>();
// Keep track what slots belong to what shard, in case a request to a shard fails on all
// copies
shardToSlots = new HashMap<>();
int expectedResults = 0;
for (int slot = 0; slot < percolateRequests.size(); slot++) {
Object element = percolateRequests.get(slot);
assert element != null;
if (element instanceof PercolateRequest) {
PercolateRequest percolateRequest = (PercolateRequest) element;
String[] concreteIndices;
try {
concreteIndices =
indexNameExpressionResolver.concreteIndices(clusterState, percolateRequest);
} catch (IndexNotFoundException e) {
reducedResponses.set(slot, e);
responsesByItemAndShard.set(slot, new AtomicReferenceArray(0));
expectedOperationsPerItem.set(slot, new AtomicInteger(0));
continue;
}
Map<String, Set<String>> routing =
indexNameExpressionResolver.resolveSearchRouting(
clusterState, percolateRequest.routing(), percolateRequest.indices());
// TODO: I only need shardIds, ShardIterator(ShardRouting) is only needed in
// TransportShardMultiPercolateAction
GroupShardsIterator shards =
clusterService
.operationRouting()
.searchShards(
clusterState, concreteIndices, routing, percolateRequest.preference());
if (shards.size() == 0) {
reducedResponses.set(slot, new UnavailableShardsException(null, "No shards available"));
responsesByItemAndShard.set(slot, new AtomicReferenceArray(0));
expectedOperationsPerItem.set(slot, new AtomicInteger(0));
continue;
}
// The shard id is used as index in the atomic ref array, so we need to find out how many
// shards there are regardless of routing:
int numShards =
clusterService
.operationRouting()
.searchShardsCount(clusterState, concreteIndices, null);
responsesByItemAndShard.set(slot, new AtomicReferenceArray(numShards));
expectedOperationsPerItem.set(slot, new AtomicInteger(shards.size()));
for (ShardIterator shard : shards) {
ShardId shardId = shard.shardId();
TransportShardMultiPercolateAction.Request requests = requestsByShard.get(shardId);
if (requests == null) {
requestsByShard.put(
shardId,
requests =
new TransportShardMultiPercolateAction.Request(
multiPercolateRequest,
shardId.getIndex(),
shardId.getId(),
percolateRequest.preference()));
}
logger.trace("Adding shard[{}] percolate request for item[{}]", shardId, slot);
requests.add(
new TransportShardMultiPercolateAction.Request.Item(
slot, new PercolateShardRequest(shardId, percolateRequest)));
IntArrayList items = shardToSlots.get(shardId);
if (items == null) {
shardToSlots.put(shardId, items = new IntArrayList());
}
items.add(slot);
}
expectedResults++;
} else if (element instanceof Throwable || element instanceof MultiGetResponse.Failure) {
logger.trace("item[{}] won't be executed, reason: {}", slot, element);
reducedResponses.set(slot, element);
responsesByItemAndShard.set(slot, new AtomicReferenceArray(0));
expectedOperationsPerItem.set(slot, new AtomicInteger(0));
}
}
expectedOperations = new AtomicInteger(expectedResults);
}
