public class MapperService extends AbstractIndexComponent {
/** The reason why a mapping is being merged. */
public enum MergeReason {
/** Create or update a mapping. */
MAPPING_UPDATE,
/**
* Recovery of an existing mapping, for instance because of a restart, if a shard was moved to a
* different node or for administrative purposes.
*/
MAPPING_RECOVERY;
}
public static final String DEFAULT_MAPPING = "_default_";
public static final Setting<Long> INDEX_MAPPING_NESTED_FIELDS_LIMIT_SETTING =
Setting.longSetting(
"index.mapping.nested_fields.limit", 50L, 0, Property.Dynamic, Property.IndexScope);
public static final Setting<Long> INDEX_MAPPING_TOTAL_FIELDS_LIMIT_SETTING =
Setting.longSetting(
"index.mapping.total_fields.limit", 1000L, 0, Property.Dynamic, Property.IndexScope);
public static final Setting<Long> INDEX_MAPPING_DEPTH_LIMIT_SETTING =
Setting.longSetting(
"index.mapping.depth.limit", 20L, 1, Property.Dynamic, Property.IndexScope);
public static final boolean INDEX_MAPPER_DYNAMIC_DEFAULT = true;
public static final Setting<Boolean> INDEX_MAPPER_DYNAMIC_SETTING =
Setting.boolSetting(
"index.mapper.dynamic", INDEX_MAPPER_DYNAMIC_DEFAULT, Property.IndexScope);
private static ObjectHashSet<String> META_FIELDS =
ObjectHashSet.from(
"_uid",
"_id",
"_type",
"_all",
"_parent",
"_routing",
"_index",
"_size",
"_timestamp",
"_ttl");
private final AnalysisService analysisService;
/** Will create types automatically if they do not exists in the mapping definition yet */
private final boolean dynamic;
private volatile String defaultMappingSource;
private volatile Map<String, DocumentMapper> mappers = emptyMap();
private volatile FieldTypeLookup fieldTypes;
private volatile Map<String, ObjectMapper> fullPathObjectMappers = new HashMap<>();
private boolean hasNested = false; // updated dynamically to true when a nested object is added
private final DocumentMapperParser documentParser;
private final MapperAnalyzerWrapper indexAnalyzer;
private final MapperAnalyzerWrapper searchAnalyzer;
private final MapperAnalyzerWrapper searchQuoteAnalyzer;
private volatile Map<String, MappedFieldType> unmappedFieldTypes = emptyMap();
private volatile Set<String> parentTypes = emptySet();
final MapperRegistry mapperRegistry;
public MapperService(
IndexSettings indexSettings,
AnalysisService analysisService,
SimilarityService similarityService,
MapperRegistry mapperRegistry,
Supplier<QueryShardContext> queryShardContextSupplier) {
super(indexSettings);
this.analysisService = analysisService;
this.fieldTypes = new FieldTypeLookup();
this.documentParser =
new DocumentMapperParser(
indexSettings,
this,
analysisService,
similarityService,
mapperRegistry,
queryShardContextSupplier);
this.indexAnalyzer =
new MapperAnalyzerWrapper(analysisService.defaultIndexAnalyzer(), p -> p.indexAnalyzer());
this.searchAnalyzer =
new MapperAnalyzerWrapper(analysisService.defaultSearchAnalyzer(), p -> p.searchAnalyzer());
this.searchQuoteAnalyzer =
new MapperAnalyzerWrapper(
analysisService.defaultSearchQuoteAnalyzer(), p -> p.searchQuoteAnalyzer());
this.mapperRegistry = mapperRegistry;
this.dynamic = this.indexSettings.getValue(INDEX_MAPPER_DYNAMIC_SETTING);
if (index().getName().equals(ScriptService.SCRIPT_INDEX)) {
defaultMappingSource =
"{"
+ "\"_default_\": {"
+ "\"properties\": {"
+ "\"script\": { \"enabled\": false },"
+ "\"template\": { \"enabled\": false }"
+ "}"
+ "}"
+ "}";
} else {
defaultMappingSource = "{\"_default_\":{}}";
}
if (logger.isTraceEnabled()) {
logger.trace("using dynamic[{}], default mapping source[{}]", dynamic, defaultMappingSource);
} else if (logger.isDebugEnabled()) {
logger.debug("using dynamic[{}]", dynamic);
}
}
public boolean hasNested() {
return this.hasNested;
}
/**
* returns an immutable iterator over current document mappers.
*
* @param includingDefaultMapping indicates whether the iterator should contain the {@link
* #DEFAULT_MAPPING} document mapper. As is this not really an active type, you would
* typically set this to false
*/
public Iterable<DocumentMapper> docMappers(final boolean includingDefaultMapping) {
return () -> {
final Collection<DocumentMapper> documentMappers;
if (includingDefaultMapping) {
documentMappers = mappers.values();
} else {
documentMappers =
mappers
.values()
.stream()
.filter(mapper -> !DEFAULT_MAPPING.equals(mapper.type()))
.collect(Collectors.toList());
}
return Collections.unmodifiableCollection(documentMappers).iterator();
};
}
public AnalysisService analysisService() {
return this.analysisService;
}
public DocumentMapperParser documentMapperParser() {
return this.documentParser;
}
public DocumentMapper merge(
String type, CompressedXContent mappingSource, MergeReason reason, boolean updateAllTypes) {
if (DEFAULT_MAPPING.equals(type)) {
// verify we can parse it
// NOTE: never apply the default here
DocumentMapper mapper = documentParser.parse(type, mappingSource);
// still add it as a document mapper so we have it registered and, for example, persisted back
// into
// the cluster meta data if needed, or checked for existence
synchronized (this) {
mappers = newMapBuilder(mappers).put(type, mapper).map();
}
try {
defaultMappingSource = mappingSource.string();
} catch (IOException e) {
throw new ElasticsearchGenerationException("failed to un-compress", e);
}
return mapper;
} else {
synchronized (this) {
final boolean applyDefault =
// the default was already applied if we are recovering
reason != MergeReason.MAPPING_RECOVERY
// only apply the default mapping if we don't have the type yet
&& mappers.containsKey(type) == false;
DocumentMapper mergeWith = parse(type, mappingSource, applyDefault);
return merge(mergeWith, reason, updateAllTypes);
}
}
}
private synchronized DocumentMapper merge(
DocumentMapper mapper, MergeReason reason, boolean updateAllTypes) {
if (mapper.type().length() == 0) {
throw new InvalidTypeNameException("mapping type name is empty");
}
if (mapper.type().length() > 255) {
throw new InvalidTypeNameException(
"mapping type name ["
+ mapper.type()
+ "] is too long; limit is length 255 but was ["
+ mapper.type().length()
+ "]");
}
if (mapper.type().charAt(0) == '_') {
throw new InvalidTypeNameException(
"mapping type name [" + mapper.type() + "] can't start with '_'");
}
if (mapper.type().contains("#")) {
throw new InvalidTypeNameException(
"mapping type name [" + mapper.type() + "] should not include '#' in it");
}
if (mapper.type().contains(",")) {
throw new InvalidTypeNameException(
"mapping type name [" + mapper.type() + "] should not include ',' in it");
}
if (mapper.type().equals(mapper.parentFieldMapper().type())) {
throw new IllegalArgumentException("The [_parent.type] option can't point to the same type");
}
if (typeNameStartsWithIllegalDot(mapper)) {
throw new IllegalArgumentException(
"mapping type name [" + mapper.type() + "] must not start with a '.'");
}
// 1. compute the merged DocumentMapper
DocumentMapper oldMapper = mappers.get(mapper.type());
DocumentMapper newMapper;
if (oldMapper != null) {
newMapper = oldMapper.merge(mapper.mapping(), updateAllTypes);
} else {
newMapper = mapper;
}
// 2. check basic sanity of the new mapping
List<ObjectMapper> objectMappers = new ArrayList<>();
List<FieldMapper> fieldMappers = new ArrayList<>();
Collections.addAll(fieldMappers, newMapper.mapping().metadataMappers);
MapperUtils.collect(newMapper.mapping().root(), objectMappers, fieldMappers);
checkFieldUniqueness(newMapper.type(), objectMappers, fieldMappers);
checkObjectsCompatibility(newMapper.type(), objectMappers, fieldMappers, updateAllTypes);
// 3. update lookup data-structures
// this will in particular make sure that the merged fields are compatible with other types
FieldTypeLookup fieldTypes =
this.fieldTypes.copyAndAddAll(newMapper.type(), fieldMappers, updateAllTypes);
boolean hasNested = this.hasNested;
Map<String, ObjectMapper> fullPathObjectMappers = new HashMap<>(this.fullPathObjectMappers);
for (ObjectMapper objectMapper : objectMappers) {
fullPathObjectMappers.put(objectMapper.fullPath(), objectMapper);
if (objectMapper.nested().isNested()) {
hasNested = true;
}
}
fullPathObjectMappers = Collections.unmodifiableMap(fullPathObjectMappers);
if (reason == MergeReason.MAPPING_UPDATE) {
// this check will only be performed on the master node when there is
// a call to the update mapping API. For all other cases like
// the master node restoring mappings from disk or data nodes
// deserializing cluster state that was sent by the master node,
// this check will be skipped.
checkNestedFieldsLimit(fullPathObjectMappers);
checkTotalFieldsLimit(objectMappers.size() + fieldMappers.size());
checkDepthLimit(fullPathObjectMappers.keySet());
checkPercolatorFieldLimit(fieldTypes);
}
Set<String> parentTypes = this.parentTypes;
if (oldMapper == null && newMapper.parentFieldMapper().active()) {
parentTypes = new HashSet<>(parentTypes.size() + 1);
parentTypes.addAll(this.parentTypes);
parentTypes.add(mapper.parentFieldMapper().type());
parentTypes = Collections.unmodifiableSet(parentTypes);
}
Map<String, DocumentMapper> mappers = new HashMap<>(this.mappers);
mappers.put(newMapper.type(), newMapper);
for (Map.Entry<String, DocumentMapper> entry : mappers.entrySet()) {
if (entry.getKey().equals(DEFAULT_MAPPING)) {
continue;
}
DocumentMapper m = entry.getValue();
// apply changes to the field types back
m = m.updateFieldType(fieldTypes.fullNameToFieldType);
entry.setValue(m);
}
mappers = Collections.unmodifiableMap(mappers);
// 4. commit the change
this.mappers = mappers;
this.fieldTypes = fieldTypes;
this.hasNested = hasNested;
this.fullPathObjectMappers = fullPathObjectMappers;
this.parentTypes = parentTypes;
assert assertSerialization(newMapper);
assert assertMappersShareSameFieldType();
return newMapper;
}
private boolean assertMappersShareSameFieldType() {
for (DocumentMapper mapper : docMappers(false)) {
List<FieldMapper> fieldMappers = new ArrayList<>();
Collections.addAll(fieldMappers, mapper.mapping().metadataMappers);
MapperUtils.collect(mapper.root(), new ArrayList<ObjectMapper>(), fieldMappers);
for (FieldMapper fieldMapper : fieldMappers) {
assert fieldMapper.fieldType() == fieldTypes.get(fieldMapper.name()) : fieldMapper.name();
}
}
return true;
}
private boolean typeNameStartsWithIllegalDot(DocumentMapper mapper) {
boolean legacyIndex =
getIndexSettings().getIndexVersionCreated().before(Version.V_5_0_0_alpha1);
if (legacyIndex) {
return mapper.type().startsWith(".")
&& !PercolatorFieldMapper.LEGACY_TYPE_NAME.equals(mapper.type());
} else {
return mapper.type().startsWith(".");
}
}
private boolean assertSerialization(DocumentMapper mapper) {
// capture the source now, it may change due to concurrent parsing
final CompressedXContent mappingSource = mapper.mappingSource();
DocumentMapper newMapper = parse(mapper.type(), mappingSource, false);
if (newMapper.mappingSource().equals(mappingSource) == false) {
throw new IllegalStateException(
"DocumentMapper serialization result is different from source. \n--> Source ["
+ mappingSource
+ "]\n--> Result ["
+ newMapper.mappingSource()
+ "]");
}
return true;
}
private void checkFieldUniqueness(
String type, Collection<ObjectMapper> objectMappers, Collection<FieldMapper> fieldMappers) {
assert Thread.holdsLock(this);
// first check within mapping
final Set<String> objectFullNames = new HashSet<>();
for (ObjectMapper objectMapper : objectMappers) {
final String fullPath = objectMapper.fullPath();
if (objectFullNames.add(fullPath) == false) {
throw new IllegalArgumentException(
"Object mapper [" + fullPath + "] is defined twice in mapping for type [" + type + "]");
}
}
final Set<String> fieldNames = new HashSet<>();
for (FieldMapper fieldMapper : fieldMappers) {
final String name = fieldMapper.name();
if (objectFullNames.contains(name)) {
throw new IllegalArgumentException(
"Field [" + name + "] is defined both as an object and a field in [" + type + "]");
} else if (fieldNames.add(name) == false) {
throw new IllegalArgumentException(
"Field [" + name + "] is defined twice in [" + type + "]");
}
}
// then check other types
for (String fieldName : fieldNames) {
if (fullPathObjectMappers.containsKey(fieldName)) {
throw new IllegalArgumentException(
"["
+ fieldName
+ "] is defined as a field in mapping ["
+ type
+ "] but this name is already used for an object in other types");
}
}
for (String objectPath : objectFullNames) {
if (fieldTypes.get(objectPath) != null) {
throw new IllegalArgumentException(
"["
+ objectPath
+ "] is defined as an object in mapping ["
+ type
+ "] but this name is already used for a field in other types");
}
}
}
private void checkObjectsCompatibility(
String type,
Collection<ObjectMapper> objectMappers,
Collection<FieldMapper> fieldMappers,
boolean updateAllTypes) {
assert Thread.holdsLock(this);
for (ObjectMapper newObjectMapper : objectMappers) {
ObjectMapper existingObjectMapper = fullPathObjectMappers.get(newObjectMapper.fullPath());
if (existingObjectMapper != null) {
// simulate a merge and ignore the result, we are just interested
// in exceptions here
existingObjectMapper.merge(newObjectMapper, updateAllTypes);
}
}
}
private void checkNestedFieldsLimit(Map<String, ObjectMapper> fullPathObjectMappers) {
long allowedNestedFields = indexSettings.getValue(INDEX_MAPPING_NESTED_FIELDS_LIMIT_SETTING);
long actualNestedFields = 0;
for (ObjectMapper objectMapper : fullPathObjectMappers.values()) {
if (objectMapper.nested().isNested()) {
actualNestedFields++;
}
}
if (actualNestedFields > allowedNestedFields) {
throw new IllegalArgumentException(
"Limit of nested fields ["
+ allowedNestedFields
+ "] in index ["
+ index().getName()
+ "] has been exceeded");
}
}
private void checkTotalFieldsLimit(long totalMappers) {
long allowedTotalFields = indexSettings.getValue(INDEX_MAPPING_TOTAL_FIELDS_LIMIT_SETTING);
if (allowedTotalFields < totalMappers) {
throw new IllegalArgumentException(
"Limit of total fields ["
+ allowedTotalFields
+ "] in index ["
+ index().getName()
+ "] has been exceeded");
}
}
private void checkDepthLimit(Collection<String> objectPaths) {
final long maxDepth = indexSettings.getValue(INDEX_MAPPING_DEPTH_LIMIT_SETTING);
for (String objectPath : objectPaths) {
checkDepthLimit(objectPath, maxDepth);
}
}
private void checkDepthLimit(String objectPath, long maxDepth) {
int numDots = 0;
for (int i = 0; i < objectPath.length(); ++i) {
if (objectPath.charAt(i) == '.') {
numDots += 1;
}
}
final int depth = numDots + 2;
if (depth > maxDepth) {
throw new IllegalArgumentException(
"Limit of mapping depth ["
+ maxDepth
+ "] in index ["
+ index().getName()
+ "] has been exceeded due to object field ["
+ objectPath
+ "]");
}
}
/**
* We only allow upto 1 percolator field per index.
*
* <p>Reasoning here is that the PercolatorQueryCache only supports a single document having a
* percolator query. Also specifying multiple queries per document feels like an anti pattern
*/
private void checkPercolatorFieldLimit(Iterable<MappedFieldType> fieldTypes) {
List<String> percolatorFieldTypes = new ArrayList<>();
for (MappedFieldType fieldType : fieldTypes) {
if (fieldType instanceof PercolatorFieldMapper.PercolatorFieldType) {
percolatorFieldTypes.add(fieldType.name());
}
}
if (percolatorFieldTypes.size() > 1) {
throw new IllegalArgumentException(
"Up to one percolator field type is allowed per index, "
+ "found the following percolator fields ["
+ percolatorFieldTypes
+ "]");
}
}
public DocumentMapper parse(
String mappingType, CompressedXContent mappingSource, boolean applyDefault)
throws MapperParsingException {
return documentParser.parse(
mappingType, mappingSource, applyDefault ? defaultMappingSource : null);
}
public boolean hasMapping(String mappingType) {
return mappers.containsKey(mappingType);
}
/**
* Return the set of concrete types that have a mapping. NOTE: this does not return the default
* mapping.
*/
public Collection<String> types() {
final Set<String> types = new HashSet<>(mappers.keySet());
types.remove(DEFAULT_MAPPING);
return Collections.unmodifiableSet(types);
}
/**
* Return the {@link DocumentMapper} for the given type. By using the special {@value
* #DEFAULT_MAPPING} type, you can get a {@link DocumentMapper} for the default mapping.
*/
public DocumentMapper documentMapper(String type) {
return mappers.get(type);
}
/**
* Returns the document mapper created, including a mapping update if the type has been
* dynamically created.
*/
public DocumentMapperForType documentMapperWithAutoCreate(String type) {
DocumentMapper mapper = mappers.get(type);
if (mapper != null) {
return new DocumentMapperForType(mapper, null);
}
if (!dynamic) {
throw new TypeMissingException(
index(), type, "trying to auto create mapping, but dynamic mapping is disabled");
}
mapper = parse(type, null, true);
return new DocumentMapperForType(mapper, mapper.mapping());
}
/**
* Returns the {@link MappedFieldType} for the give fullName.
*
* <p>If multiple types have fields with the same full name, the first is returned.
*/
public MappedFieldType fullName(String fullName) {
return fieldTypes.get(fullName);
}
/**
* Returns all the fields that match the given pattern. If the pattern is prefixed with a type
* then the fields will be returned with a type prefix.
*/
public Collection<String> simpleMatchToIndexNames(String pattern) {
if (Regex.isSimpleMatchPattern(pattern) == false) {
// no wildcards
return Collections.singletonList(pattern);
}
return fieldTypes.simpleMatchToFullName(pattern);
}
public ObjectMapper getObjectMapper(String name) {
return fullPathObjectMappers.get(name);
}
/**
* Given a type (eg. long, string, ...), return an anonymous field mapper that can be used for
* search operations.
*/
public MappedFieldType unmappedFieldType(String type) {
if (type.equals("string")) {
deprecationLogger.deprecated(
"[unmapped_type:string] should be replaced with [unmapped_type:keyword]");
type = "keyword";
}
MappedFieldType fieldType = unmappedFieldTypes.get(type);
if (fieldType == null) {
final Mapper.TypeParser.ParserContext parserContext =
documentMapperParser().parserContext(type);
Mapper.TypeParser typeParser = parserContext.typeParser(type);
if (typeParser == null) {
throw new IllegalArgumentException("No mapper found for type [" + type + "]");
}
final Mapper.Builder<?, ?> builder =
typeParser.parse("__anonymous_" + type, emptyMap(), parserContext);
final BuilderContext builderContext =
new BuilderContext(indexSettings.getSettings(), new ContentPath(1));
fieldType = ((FieldMapper) builder.build(builderContext)).fieldType();
// There is no need to synchronize writes here. In the case of concurrent access, we could
// just
// compute some mappers several times, which is not a big deal
Map<String, MappedFieldType> newUnmappedFieldTypes = new HashMap<>();
newUnmappedFieldTypes.putAll(unmappedFieldTypes);
newUnmappedFieldTypes.put(type, fieldType);
unmappedFieldTypes = unmodifiableMap(newUnmappedFieldTypes);
}
return fieldType;
}
public Analyzer indexAnalyzer() {
return this.indexAnalyzer;
}
public Analyzer searchAnalyzer() {
return this.searchAnalyzer;
}
public Analyzer searchQuoteAnalyzer() {
return this.searchQuoteAnalyzer;
}
public Set<String> getParentTypes() {
return parentTypes;
}
/** @return Whether a field is a metadata field. */
public static boolean isMetadataField(String fieldName) {
return META_FIELDS.contains(fieldName);
}
public static String[] getAllMetaFields() {
return META_FIELDS.toArray(String.class);
}
/** An analyzer wrapper that can lookup fields within the index mappings */
final class MapperAnalyzerWrapper extends DelegatingAnalyzerWrapper {
private final Analyzer defaultAnalyzer;
private final Function<MappedFieldType, Analyzer> extractAnalyzer;
MapperAnalyzerWrapper(
Analyzer defaultAnalyzer, Function<MappedFieldType, Analyzer> extractAnalyzer) {
super(Analyzer.PER_FIELD_REUSE_STRATEGY);
this.defaultAnalyzer = defaultAnalyzer;
this.extractAnalyzer = extractAnalyzer;
}
@Override
protected Analyzer getWrappedAnalyzer(String fieldName) {
MappedFieldType fieldType = fullName(fieldName);
if (fieldType != null) {
Analyzer analyzer = extractAnalyzer.apply(fieldType);
if (analyzer != null) {
return analyzer;
}
}
return defaultAnalyzer;
}
}
}
/** A component that holds all data paths for a single node. */
public final class NodeEnvironment implements Closeable {
private final Logger logger;
public static class NodePath {
/* ${data.paths}/nodes/{node.id} */
public final Path path;
/* ${data.paths}/nodes/{node.id}/indices */
public final Path indicesPath;
/** Cached FileStore from path */
public final FileStore fileStore;
/**
* Cached result of Lucene's {@code IOUtils.spins} on path. This is a trilean value: null means
* we could not determine it (we are not running on Linux, or we hit an exception trying), True
* means the device possibly spins and False means it does not.
*/
public final Boolean spins;
public final int majorDeviceNumber;
public final int minorDeviceNumber;
public NodePath(Path path) throws IOException {
this.path = path;
this.indicesPath = path.resolve(INDICES_FOLDER);
this.fileStore = Environment.getFileStore(path);
if (fileStore.supportsFileAttributeView("lucene")) {
this.spins = (Boolean) fileStore.getAttribute("lucene:spins");
this.majorDeviceNumber = (int) fileStore.getAttribute("lucene:major_device_number");
this.minorDeviceNumber = (int) fileStore.getAttribute("lucene:minor_device_number");
} else {
this.spins = null;
this.majorDeviceNumber = -1;
this.minorDeviceNumber = -1;
}
}
/**
* Resolves the given shards directory against this NodePath
* ${data.paths}/nodes/{node.id}/indices/{index.uuid}/{shard.id}
*/
public Path resolve(ShardId shardId) {
return resolve(shardId.getIndex()).resolve(Integer.toString(shardId.id()));
}
/**
* Resolves index directory against this NodePath
* ${data.paths}/nodes/{node.id}/indices/{index.uuid}
*/
public Path resolve(Index index) {
return indicesPath.resolve(index.getUUID());
}
@Override
public String toString() {
return "NodePath{" + "path=" + path + ", spins=" + spins + '}';
}
}
private final NodePath[] nodePaths;
private final Path sharedDataPath;
private final Lock[] locks;
private final int nodeLockId;
private final AtomicBoolean closed = new AtomicBoolean(false);
private final Map<ShardId, InternalShardLock> shardLocks = new HashMap<>();
private final NodeMetaData nodeMetaData;
/** Maximum number of data nodes that should run in an environment. */
public static final Setting<Integer> MAX_LOCAL_STORAGE_NODES_SETTING =
Setting.intSetting("node.max_local_storage_nodes", 1, 1, Property.NodeScope);
/** If true automatically append node lock id to custom data paths. */
public static final Setting<Boolean> ADD_NODE_LOCK_ID_TO_CUSTOM_PATH =
Setting.boolSetting("node.add_lock_id_to_custom_path", true, Property.NodeScope);
/**
* Seed for determining a persisted unique uuid of this node. If the node has already a persisted
* uuid on disk, this seed will be ignored and the uuid from disk will be reused.
*/
public static final Setting<Long> NODE_ID_SEED_SETTING =
Setting.longSetting("node.id.seed", 0L, Long.MIN_VALUE, Property.NodeScope);
/** If true the [verbose] SegmentInfos.infoStream logging is sent to System.out. */
public static final Setting<Boolean> ENABLE_LUCENE_SEGMENT_INFOS_TRACE_SETTING =
Setting.boolSetting("node.enable_lucene_segment_infos_trace", false, Property.NodeScope);
public static final String NODES_FOLDER = "nodes";
public static final String INDICES_FOLDER = "indices";
public static final String NODE_LOCK_FILENAME = "node.lock";
public NodeEnvironment(Settings settings, Environment environment) throws IOException {
if (!DiscoveryNode.nodeRequiresLocalStorage(settings)) {
nodePaths = null;
sharedDataPath = null;
locks = null;
nodeLockId = -1;
nodeMetaData = new NodeMetaData(generateNodeId(settings));
logger =
Loggers.getLogger(
getClass(), Node.addNodeNameIfNeeded(settings, this.nodeMetaData.nodeId()));
return;
}
final NodePath[] nodePaths = new NodePath[environment.dataWithClusterFiles().length];
final Lock[] locks = new Lock[nodePaths.length];
boolean success = false;
// trace logger to debug issues before the default node name is derived from the node id
Logger startupTraceLogger = Loggers.getLogger(getClass(), settings);
try {
sharedDataPath = environment.sharedDataFile();
int nodeLockId = -1;
IOException lastException = null;
int maxLocalStorageNodes = MAX_LOCAL_STORAGE_NODES_SETTING.get(settings);
for (int possibleLockId = 0; possibleLockId < maxLocalStorageNodes; possibleLockId++) {
for (int dirIndex = 0; dirIndex < environment.dataFiles().length; dirIndex++) {
Path dataDirWithClusterName = environment.dataWithClusterFiles()[dirIndex];
Path dataDir = environment.dataFiles()[dirIndex];
Path dir = dataDir.resolve(NODES_FOLDER).resolve(Integer.toString(possibleLockId));
Files.createDirectories(dir);
try (Directory luceneDir = FSDirectory.open(dir, NativeFSLockFactory.INSTANCE)) {
startupTraceLogger.trace("obtaining node lock on {} ...", dir.toAbsolutePath());
try {
locks[dirIndex] = luceneDir.obtainLock(NODE_LOCK_FILENAME);
nodePaths[dirIndex] = new NodePath(dir);
nodeLockId = possibleLockId;
} catch (LockObtainFailedException ex) {
startupTraceLogger.trace("failed to obtain node lock on {}", dir.toAbsolutePath());
// release all the ones that were obtained up until now
releaseAndNullLocks(locks);
break;
}
} catch (IOException e) {
startupTraceLogger.trace(
(Supplier<?>)
() ->
new ParameterizedMessage(
"failed to obtain node lock on {}", dir.toAbsolutePath()),
e);
lastException = new IOException("failed to obtain lock on " + dir.toAbsolutePath(), e);
// release all the ones that were obtained up until now
releaseAndNullLocks(locks);
break;
}
}
if (locks[0] != null) {
// we found a lock, break
break;
}
}
if (locks[0] == null) {
final String message =
String.format(
Locale.ROOT,
"failed to obtain node locks, tried [%s] with lock id%s;"
+ " maybe these locations are not writable or multiple nodes were started without increasing [%s] (was [%d])?",
Arrays.toString(environment.dataWithClusterFiles()),
maxLocalStorageNodes == 1 ? " [0]" : "s [0--" + (maxLocalStorageNodes - 1) + "]",
MAX_LOCAL_STORAGE_NODES_SETTING.getKey(),
maxLocalStorageNodes);
throw new IllegalStateException(message, lastException);
}
this.nodeMetaData = loadOrCreateNodeMetaData(settings, startupTraceLogger, nodePaths);
this.logger =
Loggers.getLogger(
getClass(), Node.addNodeNameIfNeeded(settings, this.nodeMetaData.nodeId()));
this.nodeLockId = nodeLockId;
this.locks = locks;
this.nodePaths = nodePaths;
if (logger.isDebugEnabled()) {
logger.debug("using node location [{}], local_lock_id [{}]", nodePaths, nodeLockId);
}
maybeLogPathDetails();
maybeLogHeapDetails();
applySegmentInfosTrace(settings);
assertCanWrite();
success = true;
} finally {
if (success == false) {
IOUtils.closeWhileHandlingException(locks);
}
}
}
/** Returns true if the directory is empty */
private static boolean dirEmpty(final Path path) throws IOException {
try (DirectoryStream<Path> stream = Files.newDirectoryStream(path)) {
return stream.iterator().hasNext() == false;
}
}
private static void releaseAndNullLocks(Lock[] locks) {
for (int i = 0; i < locks.length; i++) {
if (locks[i] != null) {
IOUtils.closeWhileHandlingException(locks[i]);
}
locks[i] = null;
}
}
private void maybeLogPathDetails() throws IOException {
// We do some I/O in here, so skip this if DEBUG/INFO are not enabled:
if (logger.isDebugEnabled()) {
// Log one line per path.data:
StringBuilder sb = new StringBuilder();
for (NodePath nodePath : nodePaths) {
sb.append('\n').append(" -> ").append(nodePath.path.toAbsolutePath());
String spinsDesc;
if (nodePath.spins == null) {
spinsDesc = "unknown";
} else if (nodePath.spins) {
spinsDesc = "possibly";
} else {
spinsDesc = "no";
}
FsInfo.Path fsPath = FsProbe.getFSInfo(nodePath);
sb.append(", free_space [")
.append(fsPath.getFree())
.append("], usable_space [")
.append(fsPath.getAvailable())
.append("], total_space [")
.append(fsPath.getTotal())
.append("], spins? [")
.append(spinsDesc)
.append("], mount [")
.append(fsPath.getMount())
.append("], type [")
.append(fsPath.getType())
.append(']');
}
logger.debug("node data locations details:{}", sb);
} else if (logger.isInfoEnabled()) {
FsInfo.Path totFSPath = new FsInfo.Path();
Set<String> allTypes = new HashSet<>();
Set<String> allSpins = new HashSet<>();
Set<String> allMounts = new HashSet<>();
for (NodePath nodePath : nodePaths) {
FsInfo.Path fsPath = FsProbe.getFSInfo(nodePath);
String mount = fsPath.getMount();
if (allMounts.contains(mount) == false) {
allMounts.add(mount);
String type = fsPath.getType();
if (type != null) {
allTypes.add(type);
}
Boolean spins = fsPath.getSpins();
if (spins == null) {
allSpins.add("unknown");
} else if (spins.booleanValue()) {
allSpins.add("possibly");
} else {
allSpins.add("no");
}
totFSPath.add(fsPath);
}
}
// Just log a 1-line summary:
logger.info(
"using [{}] data paths, mounts [{}], net usable_space [{}], net total_space [{}], spins? [{}], types [{}]",
nodePaths.length,
allMounts,
totFSPath.getAvailable(),
totFSPath.getTotal(),
toString(allSpins),
toString(allTypes));
}
}
private void maybeLogHeapDetails() {
JvmInfo jvmInfo = JvmInfo.jvmInfo();
ByteSizeValue maxHeapSize = jvmInfo.getMem().getHeapMax();
String useCompressedOops = jvmInfo.useCompressedOops();
logger.info(
"heap size [{}], compressed ordinary object pointers [{}]", maxHeapSize, useCompressedOops);
}
/**
* scans the node paths and loads existing metaData file. If not found a new meta data will be
* generated and persisted into the nodePaths
*/
private static NodeMetaData loadOrCreateNodeMetaData(
Settings settings, Logger logger, NodePath... nodePaths) throws IOException {
final Path[] paths = Arrays.stream(nodePaths).map(np -> np.path).toArray(Path[]::new);
NodeMetaData metaData = NodeMetaData.FORMAT.loadLatestState(logger, paths);
if (metaData == null) {
metaData = new NodeMetaData(generateNodeId(settings));
}
// we write again to make sure all paths have the latest state file
NodeMetaData.FORMAT.write(metaData, paths);
return metaData;
}
public static String generateNodeId(Settings settings) {
Random random = Randomness.get(settings, NODE_ID_SEED_SETTING);
return UUIDs.randomBase64UUID(random);
}
@SuppressForbidden(reason = "System.out.*")
static void applySegmentInfosTrace(Settings settings) {
if (ENABLE_LUCENE_SEGMENT_INFOS_TRACE_SETTING.get(settings)) {
SegmentInfos.setInfoStream(System.out);
}
}
private static String toString(Collection<String> items) {
StringBuilder b = new StringBuilder();
for (String item : items) {
if (b.length() > 0) {
b.append(", ");
}
b.append(item);
}
return b.toString();
}
/**
* Deletes a shard data directory iff the shards locks were successfully acquired.
*
* @param shardId the id of the shard to delete to delete
* @throws IOException if an IOException occurs
*/
public void deleteShardDirectorySafe(ShardId shardId, IndexSettings indexSettings)
throws IOException, ShardLockObtainFailedException {
final Path[] paths = availableShardPaths(shardId);
logger.trace("deleting shard {} directory, paths: [{}]", shardId, paths);
try (ShardLock lock = shardLock(shardId)) {
deleteShardDirectoryUnderLock(lock, indexSettings);
}
}
/**
* Acquires, then releases, all {@code write.lock} files in the given shard paths. The
* "write.lock" file is assumed to be under the shard path's "index" directory as used by
* Elasticsearch.
*
* @throws LockObtainFailedException if any of the locks could not be acquired
*/
public static void acquireFSLockForPaths(IndexSettings indexSettings, Path... shardPaths)
throws IOException {
Lock[] locks = new Lock[shardPaths.length];
Directory[] dirs = new Directory[shardPaths.length];
try {
for (int i = 0; i < shardPaths.length; i++) {
// resolve the directory the shard actually lives in
Path p = shardPaths[i].resolve("index");
// open a directory (will be immediately closed) on the shard's location
dirs[i] =
new SimpleFSDirectory(
p, indexSettings.getValue(FsDirectoryService.INDEX_LOCK_FACTOR_SETTING));
// create a lock for the "write.lock" file
try {
locks[i] = dirs[i].obtainLock(IndexWriter.WRITE_LOCK_NAME);
} catch (IOException ex) {
throw new LockObtainFailedException(
"unable to acquire " + IndexWriter.WRITE_LOCK_NAME + " for " + p, ex);
}
}
} finally {
IOUtils.closeWhileHandlingException(locks);
IOUtils.closeWhileHandlingException(dirs);
}
}
/**
* Deletes a shard data directory. Note: this method assumes that the shard lock is acquired. This
* method will also attempt to acquire the write locks for the shard's paths before deleting the
* data, but this is best effort, as the lock is released before the deletion happens in order to
* allow the folder to be deleted
*
* @param lock the shards lock
* @throws IOException if an IOException occurs
* @throws ElasticsearchException if the write.lock is not acquirable
*/
public void deleteShardDirectoryUnderLock(ShardLock lock, IndexSettings indexSettings)
throws IOException {
final ShardId shardId = lock.getShardId();
assert isShardLocked(shardId) : "shard " + shardId + " is not locked";
final Path[] paths = availableShardPaths(shardId);
logger.trace("acquiring locks for {}, paths: [{}]", shardId, paths);
acquireFSLockForPaths(indexSettings, paths);
IOUtils.rm(paths);
if (indexSettings.hasCustomDataPath()) {
Path customLocation = resolveCustomLocation(indexSettings, shardId);
logger.trace("acquiring lock for {}, custom path: [{}]", shardId, customLocation);
acquireFSLockForPaths(indexSettings, customLocation);
logger.trace("deleting custom shard {} directory [{}]", shardId, customLocation);
IOUtils.rm(customLocation);
}
logger.trace("deleted shard {} directory, paths: [{}]", shardId, paths);
assert FileSystemUtils.exists(paths) == false;
}
private boolean isShardLocked(ShardId id) {
try {
shardLock(id, 0).close();
return false;
} catch (ShardLockObtainFailedException ex) {
return true;
}
}
/**
* Deletes an indexes data directory recursively iff all of the indexes shards locks were
* successfully acquired. If any of the indexes shard directories can't be locked non of the
* shards will be deleted
*
* @param index the index to delete
* @param lockTimeoutMS how long to wait for acquiring the indices shard locks
* @param indexSettings settings for the index being deleted
* @throws IOException if any of the shards data directories can't be locked or deleted
*/
public void deleteIndexDirectorySafe(Index index, long lockTimeoutMS, IndexSettings indexSettings)
throws IOException, ShardLockObtainFailedException {
final List<ShardLock> locks = lockAllForIndex(index, indexSettings, lockTimeoutMS);
try {
deleteIndexDirectoryUnderLock(index, indexSettings);
} finally {
IOUtils.closeWhileHandlingException(locks);
}
}
/**
* Deletes an indexes data directory recursively. Note: this method assumes that the shard lock is
* acquired
*
* @param index the index to delete
* @param indexSettings settings for the index being deleted
*/
public void deleteIndexDirectoryUnderLock(Index index, IndexSettings indexSettings)
throws IOException {
final Path[] indexPaths = indexPaths(index);
logger.trace(
"deleting index {} directory, paths({}): [{}]", index, indexPaths.length, indexPaths);
IOUtils.rm(indexPaths);
if (indexSettings.hasCustomDataPath()) {
Path customLocation = resolveIndexCustomLocation(indexSettings);
logger.trace("deleting custom index {} directory [{}]", index, customLocation);
IOUtils.rm(customLocation);
}
}
/**
* Tries to lock all local shards for the given index. If any of the shard locks can't be acquired
* a {@link ShardLockObtainFailedException} is thrown and all previously acquired locks are
* released.
*
* @param index the index to lock shards for
* @param lockTimeoutMS how long to wait for acquiring the indices shard locks
* @return the {@link ShardLock} instances for this index.
* @throws IOException if an IOException occurs.
*/
public List<ShardLock> lockAllForIndex(Index index, IndexSettings settings, long lockTimeoutMS)
throws IOException, ShardLockObtainFailedException {
final int numShards = settings.getNumberOfShards();
if (numShards <= 0) {
throw new IllegalArgumentException("settings must contain a non-null > 0 number of shards");
}
logger.trace("locking all shards for index {} - [{}]", index, numShards);
List<ShardLock> allLocks = new ArrayList<>(numShards);
boolean success = false;
long startTimeNS = System.nanoTime();
try {
for (int i = 0; i < numShards; i++) {
long timeoutLeftMS =
Math.max(0, lockTimeoutMS - TimeValue.nsecToMSec((System.nanoTime() - startTimeNS)));
allLocks.add(shardLock(new ShardId(index, i), timeoutLeftMS));
}
success = true;
} finally {
if (success == false) {
logger.trace("unable to lock all shards for index {}", index);
IOUtils.closeWhileHandlingException(allLocks);
}
}
return allLocks;
}
/**
* Tries to lock the given shards ID. A shard lock is required to perform any kind of write
* operation on a shards data directory like deleting files, creating a new index writer or
* recover from a different shard instance into it. If the shard lock can not be acquired a {@link
* ShardLockObtainFailedException} is thrown.
*
* <p>Note: this method will return immediately if the lock can't be acquired.
*
* @param id the shard ID to lock
* @return the shard lock. Call {@link ShardLock#close()} to release the lock
*/
public ShardLock shardLock(ShardId id) throws ShardLockObtainFailedException {
return shardLock(id, 0);
}
/**
* Tries to lock the given shards ID. A shard lock is required to perform any kind of write
* operation on a shards data directory like deleting files, creating a new index writer or
* recover from a different shard instance into it. If the shard lock can not be acquired a {@link
* ShardLockObtainFailedException} is thrown
*
* @param shardId the shard ID to lock
* @param lockTimeoutMS the lock timeout in milliseconds
* @return the shard lock. Call {@link ShardLock#close()} to release the lock
*/
public ShardLock shardLock(final ShardId shardId, long lockTimeoutMS)
throws ShardLockObtainFailedException {
logger.trace("acquiring node shardlock on [{}], timeout [{}]", shardId, lockTimeoutMS);
final InternalShardLock shardLock;
final boolean acquired;
synchronized (shardLocks) {
if (shardLocks.containsKey(shardId)) {
shardLock = shardLocks.get(shardId);
shardLock.incWaitCount();
acquired = false;
} else {
shardLock = new InternalShardLock(shardId);
shardLocks.put(shardId, shardLock);
acquired = true;
}
}
if (acquired == false) {
boolean success = false;
try {
shardLock.acquire(lockTimeoutMS);
success = true;
} finally {
if (success == false) {
shardLock.decWaitCount();
}
}
}
logger.trace("successfully acquired shardlock for [{}]", shardId);
return new ShardLock(shardId) { // new instance prevents double closing
@Override
protected void closeInternal() {
shardLock.release();
logger.trace("released shard lock for [{}]", shardId);
}
};
}
/** A functional interface that people can use to reference {@link #shardLock(ShardId, long)} */
@FunctionalInterface
public interface ShardLocker {
ShardLock lock(ShardId shardId, long lockTimeoutMS) throws ShardLockObtainFailedException;
}
/**
* Returns all currently lock shards.
*
* <p>Note: the shard ids return do not contain a valid Index UUID
*/
public Set<ShardId> lockedShards() {
synchronized (shardLocks) {
return unmodifiableSet(new HashSet<>(shardLocks.keySet()));
}
}
private final class InternalShardLock {
/*
* This class holds a mutex for exclusive access and timeout / wait semantics
* and a reference count to cleanup the shard lock instance form the internal data
* structure if nobody is waiting for it. the wait count is guarded by the same lock
* that is used to mutate the map holding the shard locks to ensure exclusive access
*/
private final Semaphore mutex = new Semaphore(1);
private int waitCount = 1; // guarded by shardLocks
private final ShardId shardId;
InternalShardLock(ShardId shardId) {
this.shardId = shardId;
mutex.acquireUninterruptibly();
}
protected void release() {
mutex.release();
decWaitCount();
}
void incWaitCount() {
synchronized (shardLocks) {
assert waitCount > 0 : "waitCount is " + waitCount + " but should be > 0";
waitCount++;
}
}
private void decWaitCount() {
synchronized (shardLocks) {
assert waitCount > 0 : "waitCount is " + waitCount + " but should be > 0";
--waitCount;
logger.trace("shard lock wait count for {} is now [{}]", shardId, waitCount);
if (waitCount == 0) {
logger.trace("last shard lock wait decremented, removing lock for {}", shardId);
InternalShardLock remove = shardLocks.remove(shardId);
assert remove != null : "Removed lock was null";
}
}
}
void acquire(long timeoutInMillis) throws ShardLockObtainFailedException {
try {
if (mutex.tryAcquire(timeoutInMillis, TimeUnit.MILLISECONDS) == false) {
throw new ShardLockObtainFailedException(
shardId, "obtaining shard lock timed out after " + timeoutInMillis + "ms");
}
} catch (InterruptedException e) {
Thread.currentThread().interrupt();
throw new ShardLockObtainFailedException(
shardId, "thread interrupted while trying to obtain shard lock", e);
}
}
}
public boolean hasNodeFile() {
return nodePaths != null && locks != null;
}
/**
* Returns an array of all of the nodes data locations.
*
* @throws IllegalStateException if the node is not configured to store local locations
*/
public Path[] nodeDataPaths() {
assertEnvIsLocked();
Path[] paths = new Path[nodePaths.length];
for (int i = 0; i < paths.length; i++) {
paths[i] = nodePaths[i].path;
}
return paths;
}
/**
* returns the unique uuid describing this node. The uuid is persistent in the data folder of this
* node and remains across restarts.
*/
public String nodeId() {
// we currently only return the ID and hide the underlying nodeMetaData implementation in order
// to avoid
// confusion with other "metadata" like node settings found in elasticsearch.yml. In future
// we can encapsulate both (and more) in one NodeMetaData (or NodeSettings) object ala
// IndexSettings
return nodeMetaData.nodeId();
}
/** Returns an array of all of the {@link NodePath}s. */
public NodePath[] nodePaths() {
assertEnvIsLocked();
if (nodePaths == null || locks == null) {
throw new IllegalStateException("node is not configured to store local location");
}
return nodePaths;
}
/** Returns all index paths. */
public Path[] indexPaths(Index index) {
assertEnvIsLocked();
Path[] indexPaths = new Path[nodePaths.length];
for (int i = 0; i < nodePaths.length; i++) {
indexPaths[i] = nodePaths[i].resolve(index);
}
return indexPaths;
}
/**
* Returns all shard paths excluding custom shard path. Note: Shards are only allocated on one of
* the returned paths. The returned array may contain paths to non-existing directories.
*
* @see IndexSettings#hasCustomDataPath()
* @see #resolveCustomLocation(IndexSettings, ShardId)
*/
public Path[] availableShardPaths(ShardId shardId) {
assertEnvIsLocked();
final NodePath[] nodePaths = nodePaths();
final Path[] shardLocations = new Path[nodePaths.length];
for (int i = 0; i < nodePaths.length; i++) {
shardLocations[i] = nodePaths[i].resolve(shardId);
}
return shardLocations;
}
/** Returns all folder names in ${data.paths}/nodes/{node.id}/indices folder */
public Set<String> availableIndexFolders() throws IOException {
if (nodePaths == null || locks == null) {
throw new IllegalStateException("node is not configured to store local location");
}
assertEnvIsLocked();
Set<String> indexFolders = new HashSet<>();
for (NodePath nodePath : nodePaths) {
Path indicesLocation = nodePath.indicesPath;
if (Files.isDirectory(indicesLocation)) {
try (DirectoryStream<Path> stream = Files.newDirectoryStream(indicesLocation)) {
for (Path index : stream) {
if (Files.isDirectory(index)) {
indexFolders.add(index.getFileName().toString());
}
}
}
}
}
return indexFolders;
}
/**
* Resolves all existing paths to <code>indexFolderName</code> in
* ${data.paths}/nodes/{node.id}/indices
*/
public Path[] resolveIndexFolder(String indexFolderName) throws IOException {
if (nodePaths == null || locks == null) {
throw new IllegalStateException("node is not configured to store local location");
}
assertEnvIsLocked();
List<Path> paths = new ArrayList<>(nodePaths.length);
for (NodePath nodePath : nodePaths) {
Path indexFolder = nodePath.indicesPath.resolve(indexFolderName);
if (Files.exists(indexFolder)) {
paths.add(indexFolder);
}
}
return paths.toArray(new Path[paths.size()]);
}
/**
* Tries to find all allocated shards for the given index on the current node. NOTE: This methods
* is prone to race-conditions on the filesystem layer since it might not see directories created
* concurrently or while it's traversing.
*
* @param index the index to filter shards
* @return a set of shard IDs
* @throws IOException if an IOException occurs
*/
public Set<ShardId> findAllShardIds(final Index index) throws IOException {
assert index != null;
if (nodePaths == null || locks == null) {
throw new IllegalStateException("node is not configured to store local location");
}
assertEnvIsLocked();
final Set<ShardId> shardIds = new HashSet<>();
final String indexUniquePathId = index.getUUID();
for (final NodePath nodePath : nodePaths) {
Path location = nodePath.indicesPath;
if (Files.isDirectory(location)) {
try (DirectoryStream<Path> indexStream = Files.newDirectoryStream(location)) {
for (Path indexPath : indexStream) {
if (indexUniquePathId.equals(indexPath.getFileName().toString())) {
shardIds.addAll(findAllShardsForIndex(indexPath, index));
}
}
}
}
}
return shardIds;
}
private static Set<ShardId> findAllShardsForIndex(Path indexPath, Index index)
throws IOException {
assert indexPath.getFileName().toString().equals(index.getUUID());
Set<ShardId> shardIds = new HashSet<>();
if (Files.isDirectory(indexPath)) {
try (DirectoryStream<Path> stream = Files.newDirectoryStream(indexPath)) {
for (Path shardPath : stream) {
String fileName = shardPath.getFileName().toString();
if (Files.isDirectory(shardPath) && fileName.chars().allMatch(Character::isDigit)) {
int shardId = Integer.parseInt(fileName);
ShardId id = new ShardId(index, shardId);
shardIds.add(id);
}
}
}
}
return shardIds;
}
@Override
public void close() {
if (closed.compareAndSet(false, true) && locks != null) {
for (Lock lock : locks) {
try {
logger.trace("releasing lock [{}]", lock);
lock.close();
} catch (IOException e) {
logger.trace(
(Supplier<?>) () -> new ParameterizedMessage("failed to release lock [{}]", lock), e);
}
}
}
}
private void assertEnvIsLocked() {
if (!closed.get() && locks != null) {
for (Lock lock : locks) {
try {
lock.ensureValid();
} catch (IOException e) {
logger.warn("lock assertion failed", e);
throw new IllegalStateException("environment is not locked", e);
}
}
}
}
/**
* This method tries to write an empty file and moves it using an atomic move operation. This
* method throws an {@link IllegalStateException} if this operation is not supported by the
* filesystem. This test is executed on each of the data directories. This method cleans up all
* files even in the case of an error.
*/
public void ensureAtomicMoveSupported() throws IOException {
final NodePath[] nodePaths = nodePaths();
for (NodePath nodePath : nodePaths) {
assert Files.isDirectory(nodePath.path) : nodePath.path + " is not a directory";
final Path src = nodePath.path.resolve("__es__.tmp");
final Path target = nodePath.path.resolve("__es__.final");
try {
Files.createFile(src);
Files.move(src, target, StandardCopyOption.ATOMIC_MOVE);
} catch (AtomicMoveNotSupportedException ex) {
throw new IllegalStateException(
"atomic_move is not supported by the filesystem on path ["
+ nodePath.path
+ "] atomic_move is required for elasticsearch to work correctly.",
ex);
} finally {
try {
Files.deleteIfExists(src);
} finally {
Files.deleteIfExists(target);
}
}
}
}
/**
* Resolve the custom path for a index's shard. Uses the {@code IndexMetaData.SETTING_DATA_PATH}
* setting to determine the root path for the index.
*
* @param indexSettings settings for the index
*/
public Path resolveBaseCustomLocation(IndexSettings indexSettings) {
String customDataDir = indexSettings.customDataPath();
if (customDataDir != null) {
// This assert is because this should be caught by MetaDataCreateIndexService
assert sharedDataPath != null;
if (ADD_NODE_LOCK_ID_TO_CUSTOM_PATH.get(indexSettings.getNodeSettings())) {
return sharedDataPath.resolve(customDataDir).resolve(Integer.toString(this.nodeLockId));
} else {
return sharedDataPath.resolve(customDataDir);
}
} else {
throw new IllegalArgumentException(
"no custom " + IndexMetaData.SETTING_DATA_PATH + " setting available");
}
}
/**
* Resolve the custom path for a index's shard. Uses the {@code IndexMetaData.SETTING_DATA_PATH}
* setting to determine the root path for the index.
*
* @param indexSettings settings for the index
*/
private Path resolveIndexCustomLocation(IndexSettings indexSettings) {
return resolveBaseCustomLocation(indexSettings).resolve(indexSettings.getUUID());
}
/**
* Resolve the custom path for a index's shard. Uses the {@code IndexMetaData.SETTING_DATA_PATH}
* setting to determine the root path for the index.
*
* @param indexSettings settings for the index
* @param shardId shard to resolve the path to
*/
public Path resolveCustomLocation(IndexSettings indexSettings, final ShardId shardId) {
return resolveIndexCustomLocation(indexSettings).resolve(Integer.toString(shardId.id()));
}
/** Returns the {@code NodePath.path} for this shard. */
public static Path shardStatePathToDataPath(Path shardPath) {
int count = shardPath.getNameCount();
// Sanity check:
assert Integer.parseInt(shardPath.getName(count - 1).toString()) >= 0;
assert "indices".equals(shardPath.getName(count - 3).toString());
return shardPath.getParent().getParent().getParent();
}
/**
* This is a best effort to ensure that we actually have write permissions to write in all our
* data directories. This prevents disasters if nodes are started under the wrong username etc.
*/
private void assertCanWrite() throws IOException {
for (Path path : nodeDataPaths()) { // check node-paths are writable
tryWriteTempFile(path);
}
for (String indexFolderName : this.availableIndexFolders()) {
for (Path indexPath :
this.resolveIndexFolder(indexFolderName)) { // check index paths are writable
Path indexStatePath = indexPath.resolve(MetaDataStateFormat.STATE_DIR_NAME);
tryWriteTempFile(indexStatePath);
tryWriteTempFile(indexPath);
try (DirectoryStream<Path> stream = Files.newDirectoryStream(indexPath)) {
for (Path shardPath : stream) {
String fileName = shardPath.getFileName().toString();
if (Files.isDirectory(shardPath) && fileName.chars().allMatch(Character::isDigit)) {
Path indexDir = shardPath.resolve(ShardPath.INDEX_FOLDER_NAME);
Path statePath = shardPath.resolve(MetaDataStateFormat.STATE_DIR_NAME);
Path translogDir = shardPath.resolve(ShardPath.TRANSLOG_FOLDER_NAME);
tryWriteTempFile(indexDir);
tryWriteTempFile(translogDir);
tryWriteTempFile(statePath);
tryWriteTempFile(shardPath);
}
}
}
}
}
}
private static void tryWriteTempFile(Path path) throws IOException {
if (Files.exists(path)) {
Path resolve = path.resolve(".es_temp_file");
try {
Files.createFile(resolve);
Files.deleteIfExists(resolve);
} catch (IOException ex) {
throw new IOException(
"failed to write in data directory [" + path + "] write permission is required", ex);
}
}
}
}