./databases/elasticsearch, Distributed RESTful Search Engine

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Branch: CURRENT, Version: 5.5.2, Package name: elasticsearch-5.5.2, Maintainer: imil

Elasticsearch is a distributed RESTful search engine built for the cloud.
Features include:

* Distributed and Highly Available Search Engine.
* Multi Tenant with Multi Types.
* Various set of APIs
* Document oriented
* Reliable, Asynchronous Write Behind for long term persistency.
* (Near) Real Time Search.
* Built on top of Lucene
* Per operation consistency
* Open Source under Apache 2 License.


Required to run:
[shells/bash] [lang/openjdk8]

Required to build:
[pkgtools/cwrappers]

Master sites:

SHA1: 91b3b3c823fafce54609ed5c9075d9cf50b2edff
RMD160: d4c369766b8480316f10bd2f1f541250446132f1
Filesize: 32700.882 KB

Version history: (Expand)


CVS history: (Expand)


   2017-08-18 11:03:08 by Filip Hajny | Files touched by this commit (3) | Package updated
Log message:
elasticsearch 5.5.2
======================================================================

=== Bug fixes

Aggregations::
- Fixes array out of bounds for value count agg

Core::
- Release operation permit on thread-pool rejection

Inner Hits::
- Fix inner hits to work with queries wrapped in an indices query
- When fetching nested inner hits only access stored fields when needed

Logging::
- Declare XContent deprecation logger as static

Query DSL::
- Parse "*" in query_string_query as MatchAllDocsQuery

elasticsearch 5.5.1
======================================================================

=== Bug fixes

Aliases::
- mget with an alias shouldn't ignore alias routing

Engine::
- Engine - Do not store operations that are not index into lucene in the
  translog (5.x only)

Internal::
- Fix BytesReferenceStreamInput#skip with offset

Packaging::
- Stop disabling explicit GC
- Avoid failing install if system-sysctl is masked
- Get short path name for native controllers

Query DSL::
- WrapperQueryBuilder should also rewrite the parsed query

elasticsearch 5.5.0
======================================================================

=== Breaking changes

Plugins::
- Remove hidden file leniency from spawner

Settings::
- Remove support for default settings

=== Breaking Java changes

Aggregations::
- Remove the unused SignificantTerms.compareTerm() method
- Make SignificantTerms.Bucket an interface rather than an abstract
  class
- Make Terms.Bucket an interface rather than an abstract class

Plugin Delete By Query::
- Move DeleteByQuery and Reindex requests into core

=== Deprecations

Index APIs::
- Deprecated use of + in index expressions

Packaging::
- Add deprecation warnings for $ES_USER and $ES_GROUP

Plugin Repository S3::
- S3 Repository: Deprecate remaining `repositories.s3.*` settings

REST::
- Add deprecation logging for comma-separated feature parsing

Scripting::
- Scripting: Deprecate native scripts
- Scripting: Deprecate index lookup
- Deprecate Fine Grain Settings for Scripts
- Scripting: Deprecate file script settings
- Scripting: Deprecate file scripts

Settings::
- Settings: Update settings deprecation from yml to yaml
- Deprecate settings in .yml and .json

Tribe Node::
- Deprecate tribe service

=== New features

Mapping::
- Add new ip_range field type

Plugin Analysis ICU::
- Add ICUCollationFieldMapper

=== Enhancements

Aggregations::
- Add superset size to Significant Term REST response
- Add document count to Matrix Stats aggregation response
-  Share XContent rendering code in significant terms aggregations
- Add `count` to rest output of `geo_centroid`
- Allow scripted metric agg to access `_score`

Aliases::
- Handle multiple aliases in _cat/aliases api

Circuit Breakers::
- Closing a ReleasableBytesStreamOutput closes the underlying BigArray

Cluster::
- Add a cluster block that allows to delete indices that are read-only
- Extract a common base class to allow services to listen to remote
  cluster config updates

Core::
- Explicitly reject duplicate data paths
- Use SPI in High Level Rest Client to load XContent parsers
- Improve bootstrap checks error messages
- Regex upgrades
- Detect remnants of path.data/default.path.data bug

Engine::
- Add refresh stats tracking for realtime get
- Engine: store maxUnsafeAutoIdTimestamp in commit

Exceptions::
- IllegalStateException: Only duplicated jar instead of classpath

Index APIs::
- Open and close index to honour allow_no_indices option

Ingest::
- add `exclude_keys` option to KeyValueProcessor

Inner Hits::
- Reuse inner hit query weight

Internal::
- "shard started" should show index and shard ID
- Add the ability to set eager_global_ordinals in the new parent-join
  field
- Add assertions enabled helper
- Add cross cluster support to `_field_caps`
- Log JVM arguments on startup
- Preserve cluster alias throughout search execution to lookup nodes by
  cluster and ID
- Move RemoteClusterService into TransportService
- Enum related performance additions.

Java API::
- Always Accumulate Transport Exceptions

Java High Level REST Client::
- Add doc_count to ParsedMatrixStats
- Add fromXContent method to ClearScrollResponse
- ClearScrollRequest to implement ToXContentObject
- SearchScrollRequest to implement ToXContentObject
- Backport aggs parsers for high level REST Client
- Add utility method to parse named XContent objects with typed prefix

Logging::
- Warn on not enough masters during election

Mapping::
- Do not index `_type` when there is at most one type.
- Only allow one type on 6.0 indices
- token_count type : add an option to count tokens (fix #23227)

Network::
- Disable the Netty recycler in the client
- Remove Netty logging hack
- Set available processors for Netty

Packaging::
- Set number of processes in systemd unit file

Plugin Lang Painless::
- Optimize instance creation in LambdaBootstrap
- Allow painless to load stored fields

Plugin Repository GCS::
- GCS Repository: Add secure storage of credentials

Plugins::
- Add purge option to remove plugin CLI
- Move ReindexAction class to core
- Plugins: Add support for platform specific plugins

REST::
- Make ObjectParser support string to boolean conversion
- Allow passing single scrollID in clear scroll API body

Scripting::
- Add Ability to Specify No Types/Contexts Allowed For Scripts
- Add New Security Script Settings

Search::
- Eliminate array access in tight loops when profiling is enabled.
- Support Multiple Inner Hits on a Field Collapse Request
- Expand cross cluster search indices for search requests to the
  concrete index or to it's aliases
- Remove leniency when merging fetched hits in a search response phase

Search Templates::
- Add max concurrent searches to multi template search

Settings::
- Emit settings deprecation logging at most once

Snapshot/Restore::
- Improves snapshot logging and snapshot deletion error handling
- Enhances get snapshots API to allow retrieving repository index only
- Ensure every repository has an incompatible-snapshots blob
- Change snapshot status error to use generic SnapshotException

Stats::
- Show JVM arguments

Suggesters::
- Provide informative error message in case of unknown suggestion
  context.
- Allow different data types for category in Context suggester

Upgrade API::
- Allow plugins to upgrade templates and index metadata on startup

=== Bug fixes

Aggregations::
- Terms aggregation should remap global ordinal buckets when a
  sub-aggregator is used to sort the terms
- Correctly set doc_count when MovAvg "predicts" values on existing
  buckets
- InternalPercentilesBucket should not rely on ordered percents array
- Align behavior HDR percentiles iterator with percentile() method
- DateHistogram: Fix `extended_bounds` with `offset`
- Fix ArrayIndexOutOfBoundsException when no ranges are specified in the
  query

Aliases::
- GET aliases should 404 if aliases are missing

Allocation::
- Discard stale node responses from async shard fetching

Analysis::
- PatternAnalyzer should lowercase wildcard queries when `lowercase` is
  true.

Bulk::
- Reject empty IDs

Cache::
- fix bug of weight computation

Circuit Breakers::
- Checks the circuit breaker before allocating bytes for a new big array

Core::
- Fix cache expire after access
- Check for default.path.data included in path.data

Geo::
- Fix GeoPoint FieldStats ternary logic bug
- Fix GeoDistance Ordinal for BWC

Highlighting::
- Higlighters: Fix MultiPhrasePrefixQuery rewriting

Index APIs::
- Rollover max docs should only count primaries
- Fix legacy GeoPointField decoding in FieldStats
- Validates updated settings on closed indices
- Fixes restore of a shrunken index when initial recovery node is gone

Ingest::
- fix grok's pattern parsing to validate pattern names in expression
- Fix floating-point error when DateProcessor parses UNIX
- add option for _ingest.timestamp to use new ZonedDateTime (5.x
  backport)

Inner Hits::
- Fix Source filtering in new field collapsing feature

Internal::
- Fix race condition in RemoteClusterConnection node supplier
- Initialise empty lists in BaseTaskResponse constructor
- Extract a common base class for scroll executions
- Ensure remote cluster is connected before fetching `_field_caps`
- Obey lock order if working with store to get metadata snapshots
- Remove `_UNRELEASED` from Version constants for released versions
- Fix `_field_caps` serialization in order to support cross cluster
  search
- Avoid race when shutting down controller processes
- Fix NPE if field caps request has a field that exists not in all
  indices

More Like This::
- Pass over _routing value with more_like_this items to be retrieved

Nested Docs::
- In case of a single type the _id field should be added to the nested
  document instead of _uid field

Network::
- Ensure pending transport handlers are invoked for all channel failures
- Notify onConnectionClosed rather than onNodeDisconnect to prune
  transport handlers
- SniffNodesSampler should close connection after handling responses

Packaging::
- When stopping via systemd only kill the JVM, not its control group
- Handle parentheses in batch file path

Percolator::
- Fix range queries with date range based on current time in percolator
  queries.
- For legacy indices rewrite percolator query upon percolation time
- Fix memory leak when percolator uses bitset or field data cache

Plugin Lang Painless::
- painless: Fix method references to ctor with the new LambdaBootstrap
  and cleanup code
- Fix Painless Lambdas for Java 9

Plugins::
- X-Pack plugin download fails on Windows desktop
- Fix plugin installation permissions
- Fix delete of plugin directory on remove plugin
- Use a marker file when removing a plugin
- Remove hidden file leniency from plugin service

Query DSL::
- Thread falls into infinite loop when processing Indices query

REST::
- Fix handling of exceptions thrown on HEAD requests
- Fixed NPEs caused by requests without content.
- Fix get mappings HEAD requests

Recovery::
- Provide target allocation id as part of start recovery request

Reindex API::
- Reindex: don't duplicate _source parameter
- Add qa module that tests reindex-from-remote against pre-5.0 versions
  of Elasticsearch

Scroll::
- Fix single shard scroll within a cluster with nodes in version `>=
  5.3` and `<= 5.3`

Search::
- Adds check for negative search request size
- Do not search locally if remote index pattern resolves to no indices
- Make sure range queries are correctly profiled.
- Compute the took time of the query after the expand phase of field
  collapsing
- Fix RangeFieldMapper rangeQuery to properly handle relations
- Fix ExpandSearchPhase when response contains no hits
- Include all aliases including non-filtering in  `_search_shards`
  response
- Cross Cluster Search: propagate original indices per cluster

Search Templates::
- No longer add illegal content type option to stored search templates

Settings::
- Keystore CLI should use the AddFileKeyStoreCommand for files
- Settings: Fix setting groups to include secure settings
- Allow resetting settings that use an IP validator
- Do not set path.data in environment if not set

Snapshot/Restore::
- Output all empty snapshot info fields if in verbose mode
- Remove redundant and broken MD5 checksum from repository-s3
- Consolidates the logic for cleaning up snapshots on master election
- Removes completed snapshot from cluster state on master change
- Fix inefficient (worst case exponential) loading of snapshot
  repository
- Fixes maintaining the shards a snapshot is waiting on

Stats::
- _nodes/stats should not fail due to concurrent AlreadyClosedException
- Avoid double decrement on current query counter

Suggesters::
- Fix context suggester to read values from keyword type field

Task Manager::
- Task Management: Make TaskInfo parsing forwards compatible

=== Regressions

Highlighting::
- Fix Fast Vector Highlighter NPE on match phrase prefix

=== Upgrades

Core::
- Upgrade to Lucene 6.5.1

Network::
- Upgrade to Netty 4.1.11.Final
- Upgrade Netty to 4.1.10.Final
   2017-07-04 16:19:48 by Filip Hajny | Files touched by this commit (2) | Package updated
Log message:
Update databases/elasticsearch to 5.4.3.

Snapshot/Restore::
* Improves snapshot logging and snapshot deletion error handling

Snapshot/Restore::
* Remove redundant and broken MD5 checksum from repository-s3
   2017-06-21 15:35:52 by Filip Hajny | Files touched by this commit (2) | Package updated
Log message:
Update databases/elasticsearch to 5.4.2

=== Enhancements

Core::
* Explicitly reject duplicate data paths

Packaging::
* Set number of processes in systemd unit file

=== Bug fixes

Aggregations::
* Terms aggregation should remap global ordinal buckets when a
* sub-aggregator is used to sort the terms

Analysis::
* PatternAnalyzer should lowercase wildcard queries when `lowercase`
* is true.

Circuit Breakers::
* Checks the circuit breaker before allocating bytes for a new big
* array

Geo::
* Fix GeoPoint FieldStats ternary logic bug
* Fix GeoDistance Ordinal for BWC

Index APIs::
* Rollover max docs should only count primaries

Nested Docs::
* Fix the `max` score mode.

Network::
* Ensure pending transport handlers are invoked for all channel
* failures

Packaging::
* When stopping via systemd only kill the JVM, not its control group

Suggesters::
* Fix context suggester to read values from keyword type field
   2017-06-14 15:49:35 by Filip Hajny | Files touched by this commit (3) | Package updated
Log message:
Update databases/elasticsearch to 5.4.1.

=== Enhancements

Aggregations::
- Allow scripted metric agg to access `_score`

Core::
- Improve bootstrap checks error messages

Internal::
- Log JVM arguments on startup

Network::
- Disable the Netty recycler in the client
- Remove Netty logging hack
- Set available processors for Netty

Snapshot/Restore::
- Ensure every repository has an incompatible-snapshots blob

Stats::
- Show JVM arguments

=== Bug fixes

Aggregations::
- Fix ArrayIndexOutOfBoundsException when no ranges are specified in
  the query

Allocation::
- Discard stale node responses from async shard fetching

Core::
- Fix cache expire after access

Index APIs::
- Fix legacy GeoPointField decoding in FieldStats
- Validates updated settings on closed indices

Internal::
- Remove `_UNRELEASED` from Version constants for released versions
- Avoid race when shutting down controller processes
- Fix NPE if field caps request has a field that exists not in all
  indices

More Like This::
- Pass over _routing value with more_like_this items to be retrieved

Network::
- Notify onConnectionClosed rather than onNodeDisconnect to prune
  transport handlers
- SniffNodesSampler should close connection after handling responses

Packaging::
- Handle parentheses in batch file path

Percolator::
- Fix range queries with date range based on current time in
  percolator queries.

Plugin Repository HDFS::
- Fixing permission errors for `KERBEROS` security mode for HDFS
  Repository

Plugins::
- X-Pack plugin download fails on Windows desktop [ISSUE]
- Fix plugin installation permissions

Reindex API::
- Reindex: don't duplicate _source parameter
- Add qa module that tests reindex-from-remote against pre-5.0
  versions of Elasticsearch

Scroll::
- Fix single shard scroll within a cluster with nodes in version `>=
  5.3` and `<= 5.3`

Search::
- Fix ExpandSearchPhase when response contains no hits
- Include all aliases including non-filtering in  `_search_shards`
  response

Settings::
- Allow resetting settings that use an IP validator

Snapshot/Restore::
- Removes completed snapshot from cluster state on master change
- Fix inefficient (worst case exponential) loading of snapshot
  repository

=== Upgrades

Core::
- Upgrade to Lucene 6.5.1

Network::
- Upgrade to Netty 4.1.11.Final
- Upgrade Netty to 4.1.10.Final
   2017-05-11 10:36:30 by Filip Hajny | Files touched by this commit (3) | Package updated
Log message:
Update databases/elasticsearch to 5.4.0.

=== Breaking changes

Settings::
- Remove support for default settings

=== Breaking Java changes

Aggregations::
- Move getProperty method out of MultiBucketsAggregation.Bucket
  interface
- Remove getProperty method from Aggregations interface and impl
- Move getProperty method out of Aggregation interface

Java API::
- Fold InternalSearchHits and friends into their interfaces

=== Deprecations

Aggregations::
- Deprecate Stats#getCountAsString

Java API::
- Add BulkProcessor methods with XContentType parameter

Network::
- Deprecate Netty 3

Packaging::
- Add deprecation warnings for $ES_USER and $ES_GROUP

Plugin Delete By Query::
- Deprecate delete_by_query requests without an explicit query

Plugin Repository Azure::
- Deprecate global `repositories.azure` settings

Plugin Repository S3::
- Deprecate repositories.s3 settings

REST::
- Deprecate ldjson support and document ndjson for bulk/msearch

Stats::
- Deprecate `_field_stats` endpoint

=== New features

Analysis::
- Adds pattern keyword marker filter support
- Expose WordDelimiterGraphTokenFilter

Index APIs::
- Add FieldCapabilities (`_field_caps`) API

Search::
- Introduce incremental reduction of TopDocs

Similarities::
- Adds boolean similarity to Elasticsearch

=== Enhancements

Aggregations::
- Add BucketMetricValue interface
- Move aggs CommonFields and TYPED_KEYS_DELIMITER from
  InternalAggregation to Aggregation
- Use ParseField for aggs CommonFields rather than String
- Share XContent rendering code in terms aggs
- Add unit tests for ParentToChildAggregator
- First step towards incremental reduction of query responses

Allocation::
- Trigger replica recovery restarts by master when primary relocation
  completes
- Makes the same_shard host dynamically updatable

Analysis::
- Support Keyword type in Analyze API

Cluster::
- Prevent nodes from joining if newer indices exist in the cluster

Core::
- Detect remnants of path.data/default.path.data bug
- Await termination after shutting down executors
- Add early-access check
- Adapter action future should restore interrupts
- Disable bootstrap checks for single-node discovery
- Enable explicitly enforcing bootstrap checks
- Add equals/hashcode method to ReplicationResponse

Dates::
- Improve error handling for epoch format parser with time zone
  (#22621)

Discovery::
- Introduce single-node discovery
- UnicastZenPing shouldn't ping the address of the local node
- MasterFaultDetection can start after the initial cluster state has
  been processed

Highlighting::
- Add support for fragment_length in the unified highlighter
- Add BreakIteratorBoundaryScanner support

Index APIs::
- Wildcard cluster names for cross cluster search

Ingest::
- Lazy load the geoip databases

Internal::
- Add a dedicated TransportRemoteInfoAction for consistency
- Simplify sorted top docs merging in SearchPhaseController
- Synchronized CollapseTopFieldDocs with lucenes relatives
- Cleanup SearchPhaseController interface
- Do not create String instances in 'Strings' methods accepting
  StringBuilder

Java API::
- Added types options to DeleteByQueryRequest

Java High Level REST Client::
- Convert suggestion response parsing to use NamedXContentRegistry
- UpdateRequest implements ToXContent
- Add javadoc for DocWriteResponse.Builders
- Expose WriteRequest.RefreshPolicy string representation
- Use `typed_keys` parameter to prefix suggester names by type in
  search responses
- Add parsing methods to BulkItemResponse

Logging::
- Warn on not enough masters during election

Mapping::
- Improve error message for ipv6 on legacy ip fields

Nested Docs::
- Avoid adding unnecessary nested filters when ranges are used.

Network::
- Adjust default Netty receive predictor size to 64k
- Keep the pipeline handler queue small initially
- Set network receive predictor size to 32kb
- TransportService.connectToNode should validate remote node ID

Packaging::
- Introduce Java version check
- Cleanup some things after removal of joda-time hack

Percolator::
- Allowing range queries with now ranges inside percolator queries
- Add term extraction support for MultiPhraseQuery

Plugin Discovery EC2::
- Settings: Migrate ec2 discovery sensitive settings to elasticsearch
  keystore

Plugin Lang Painless::
- Allow painless to load stored fields
- Start on custom whitelists for Painless
- Fix Painless's implementation of interfaces returning primitives
- Allow painless to implement more interfaces

Plugin Repository Azure::
- Add Backoff policy to azure repository

Plugin Repository S3::
- Removes the retry mechanism from the S3 blob store
- S3 Repository: Eagerly load static settings

Plugins::
- Modify permissions dialog for plugins
- Plugins: Add plugin cli specific exit codes
- Plugins: Output better error message when existing plugin is
  incompatible

Query DSL::
- Make it possible to validate a query on all shards instead of a
  single random shard

REST::
- Validate top-level keys when parsing mget requests
- Cluster stats should not render empty http/transport types
- Add parameter to prefix aggs name with type in search responses

Search::
- Set shard count limit to unlimited
- Streamline shard index availability in all SearchPhaseResults
- Search took time should use a relative clock
- Prevent negative `from` parameter in SearchSourceBuilder
- Remove unnecessary result sorting in SearchPhaseController
- Expose `batched_reduce_size` via `_search`
- Adding fromXContent to Suggest and Suggestion class
- Adding fromXContent to Suggestion.Entry and subclasses
- Add CollapseSearchPhase as a successor for the FetchSearchPhase
- Integrate IndexOrDocValuesQuery.
- Detach SearchPhases from AbstractSearchAsyncAction
- Fix GraphQuery expectation after Lucene upgrade to 6.5
- Nested queries should avoid adding unnecessary filters when
  possible.
- Add xcontent parsing to completion suggestion option
- Add xcontent parsing to suggestion options
- Separate reduce (aggs, suggest and profile) from merging fetched
  hits

Settings::
- Add secure file setting to keystore
- Add a setting which specifies a list of setting
- Add a property to mark setting as final
- Remove obsolete index setting `index.version.minimum_compatible`.
- Provide a method to retrieve a closeable char[] from a SecureString
- Update indices settings api to support CBOR and SMILE format
- Improve setting deprecation message

Snapshot/Restore::
- Change snapshot status error to use generic SnapshotException

Stats::
- Add cross-cluster search remote cluster info API

Task Manager::
- Allow task to be unregistered by ClusterStateApplier
- Limit IndexRequest toString() length

=== Bug fixes

Aggregations::
- Align behavior HDR percentiles iterator with percentile() method
- The `filter` and `significant_terms` aggregations should parse the
  `filter` as a filter, not a query.
- Completion suggestion should also consider text if prefix/regex is
  missing
- Fixes the per term error in the terms aggregation
- Fixes terms error count for multiple reduce phases
- Restore support for the `include/pattern` syntax.

Bulk::
- Reject empty IDs

CRUD::
- Fix backport executing ops as single item bulk

Cluster::
- Don't set local node on cluster state used for node join validation
- Allow a cluster state applier to create an observer and wait for a
  better state
- Cluster allocation explain to never return empty response body

Core::
- Check for default.path.data included in path.data
- Improve performance of extracting warning value
- Reject duplicate settings on the command line
- Restrict build info loading to ES jar, not any jar

Discovery::
- ZenDiscovery - only validate min_master_nodes values if local node
  is master

Index APIs::
- Fixes restore of a shrunken index when initial recovery node is gone
- Honor update request timeout

Ingest::
- Improve missing ingest processor error
- update _ingest.timestamp to use new ZonedDateTime

Inner Hits::
- Replace NestedChildrenQuery with ParentChildrenBlockJoinQuery
- Changed DisMaxQueryBuilder to extract inner hits from leaf queries

Internal::
- Add infrastructure to mark contexts as system contexts
- Always restore the ThreadContext for operations delayed due to a
  block

Java High Level REST Client::
- Correctly parse BulkItemResponse.Failure's status

Java REST Client::
- Make buffer limit configurable in HeapBufferedConsumerFactory
- RestClient asynchronous execution should not throw exceptions

Mapping::
- Preserve response headers when creating an index
- Improves disabled fielddata error message
- Switch include_in_all in multifield to warning
- Fix MapperService StackOverflowError
- Fix NPE with scaled floats stats when field is not indexed

Network::
- Fix possible hang in local transport when nodes get concurrently
  disconnected
- Respect promises on pipelined responses
- Ensure that releasing listener is called

Packaging::
- Fall back to non-atomic move when removing plugins

Percolator::
- Fix memory leak when percolator uses bitset or field data cache

Plugin Ingest Attachment::
- Remove support for Visio and potm files

Plugin Lang Painless::
- Fix painless's regex lexer and error messages
- Replace Painless's Cast with casting strategies
- Fix Bad Casts In Painless

Plugin Repository Azure::
- Azure blob store's readBlob() method first checks if the blob exists

Plugin Repository S3::
- Handle BlobPath's trailing separator case. Add test cases to
  BlobPathTests.java

Plugins::
- Fix delete of plugin directory on remove plugin
- Use a marker file when removing a plugin

Query DSL::
- FuzzyQueryBuilder should error when parsing array of values

REST::
- [API] change wait_for_completion default according to docs
- Deprecate request_cache for clear-cache
- HTTP transport stashes the ThreadContext instead of the
  RestController
- Ensure we try to autodetect content type for handlers that support
  plain text
- Fix date format in warning headers
- Align REST specs for HEAD requests
- Correct warning header to be compliant
- Fix get HEAD requests
- Fix search scroll request with a plain text body
- Handle bad HTTP requests
- Fix get source HEAD requests
- Properly encode location header
- Fix template HEAD requests
- Fix index HEAD requests
- Fix alias HEAD requests

Recovery::
- Provide target allocation id as part of start recovery request

Reindex API::
- Fix throttled reindex_from_remote
- Fix reindex with a remote source on a version before 2.0.0
- Make reindex wait for cleanup before responding

Scripting::
- Remove unnecessary Groovy deprecation logging
- Convert script/template objects to json format internally
- Script: Fix value of `ctx._now` to be current epoch time in
  milliseconds

Search::
- Cross Cluster Search: propagate original indices per cluster
- Query string default field
- Speed up parsing of large `terms` queries.
- IndicesQueryCache should delegate the scorerSupplier method.
- Fork LRUQueryCache from Lucene to work around LUCENE-7749
- Disable graph analysis at query time for shingle and cjk filters
  producing tokens of different size
- Fix cross-cluster remote node gateway attributes
- Use a fixed seed for computing term hashCode in TermsSliceQuery
- Honor max concurrent searches in multi-search
- Avoid stack overflow in multi-search
- Fix query_string_query to transform "foo:*" in an exists query on
  the field name
- Factor out filling of TopDocs in SearchPhaseController
- Replace blocking calls in ExpandCollapseSearchResponseListener by
  asynchronous requests

Search Templates::
- No longer add illegal content type option to stored search templates

Settings::
- Do not set path.data in environment if not set
- Correct handling of default and array settings
- Fix merge scheduler config settings
- Settings: Fix keystore cli prompting for yes/no to handle console
  returning null

Similarities::
- Fix similarity upgrade when "default" similarity is overridden

Snapshot/Restore::
- Fixes maintaining the shards a snapshot is waiting on
- Fixes snapshot status on failed snapshots
- Fixes snapshot deletion handling on in-progress snapshot failure
- Prioritize listing index-N blobs over index.latest in reading
  snapshots

Stats::
- Avoid overflow when computing total FS stats
- Handle existence of cgroup version 2 hierarchy
- Handle long overflow when adding paths' totals
- Fix control group pattern
- Fix total disk bytes returning negative value

=== Regressions

Bulk::
- Fix _bulk response when it can't create an index

=== Upgrades

Aggregations::
- Upgrade HDRHistogram to 2.1.9

Core::
- Upgrade to Lucene 6.5.0
- Upgrade from JNA 4.2.2 to JNA 4.4.0
- Upgrade to lucene-6.5.0-snapshot-d00c5ca
- Upgrade to lucene-6.5.0-snapshot-f919485.

Logging::
- Upgrade to Log4j 2.8.2

Network::
- Upgrade to Netty 4.1.9
- Upgrade to Netty 4.1.8

Plugin Repository Azure::
- Update to Azure Storage 5.0.0
   2017-04-22 19:20:55 by Filip Hajny | Files touched by this commit (3) | Package updated
Log message:
Update databases/elasticsearch to 5.3.1

=== Breaking changes

Settings::
- Remove support for default settings

=== Enhancements

Core::
- Detect remnants of path.data/default.path.data bug

Network::
- Adjust default Netty receive predictor size to 64k

REST::
- Cluster stats should not render empty http/transport types

=== Bug fixes

Aggregations::
- The `filter` and `significant_terms` aggregations should parse the
  `filter` as a filter, not a query.
- Restore support for the `include/pattern` syntax.

Bulk::
- Reject empty IDs

Core::
- Improve performance of extracting warning value
- Restrict build info loading to ES jar, not any jar

Discovery::
- ZenDiscovery - only validate min_master_nodes values if local node
  is master

Index APIs::
- Honor update request timeout

Inner Hits::
- Replace `NestedChildrenQuery` with `ParentChildrenBlockJoinQuery`

Internal::
- Add infrastructure to mark contexts as system contexts

Java REST Client::
- Make buffer limit configurable in HeapBufferedConsumerFactory

Mapping::
- Preserve response headers when creating an index
- Fix NPE with scaled floats stats when field is not indexed

Network::
- Fix possible hang in local transport when nodes get concurrently
  disconnected

Plugin Repository Azure::
- Azure blob store's readBlob() method first checks if the blob exists

Reindex API::
- Fix reindex with a remote source on a version before 2.0.0

Search::
- Disable graph analysis at query time for shingle and cjk filters
  producing tokens of different size
- Fix cross-cluster remote node gateway attributes
- Use a fixed seed for computing term hashCode in TermsSliceQuery

Settings::
- Do not set path.data in environment if not set
- Correct handling of default and array settings

Stats::
- Handle existence of cgroup version 2 hierarchy

=== Upgrades

Internal::
- upgrade to Lucene 6.4.2
   2017-03-30 17:23:50 by Filip Hajny | Files touched by this commit (3) | Package updated
Log message:
Update databases/elasticsearch to 5.3.0

=== Breaking changes

Query DSL::
- Fix name of `enabled_position_increments`

Search::
- Remove DFS_QUERY_AND_FETCH as a search type

=== Breaking Java changes

CRUD::
- Make index and delete operation execute as single bulk item
  (backport of #21964)

Internal::
- Replace SearchExtRegistry with namedObject
- Replace Suggesters with namedObject

Network::
- Remove HttpServer and HttpServerAdapter in favor of a simple
  dispatch method

Plugins::
- Deguice rest handlers

Search::
- Remove QUERY_AND_FETCH search type

=== Deprecations

Core::
- Deprecate lenient booleans

Geo::
- Geo distance range deprecation

Java API::
- Add BulkProcessor methods with XContentType parameter

Mapping::
- Deprecate the include_in_all mapping parameter

Network::
- Deprecate Netty 3
- Deprecate Netty 3

Plugin Repository Azure::
- Deprecate auto creation of container for azure repository

Plugin Repository S3::
- S3 Repository: Deprecate specifying region
- S3 Repository: Deprecate auto creation of s3 bucket for repository
- Deprecate specifying credentials through env vars, sys props, and
  remove profile files

REST::
- Deprecate ldjson support and document ndjson for bulk/msearch
- Optionally require a valid content type for all rest requests with
  content

Scripting::
- Change Namespace for Stored Script to Only Use Id

=== New features

Aggregations::
- Initial version of an adjacency matrix using the Filters aggregation

CRUD::
- Allow an index to be partitioned with custom routing

Highlighting::
- Integrate UnifiedHighlighter

Search::
- Add federated cross cluster search capabilities
- Add field collapsing for search request

Settings::
- Add infrastructure for elasticsearch keystore

=== Enhancements

Allocation::
- Include stale replica shard info when explaining an unassigned
  primary

Analysis::
- Analyze API Position Length Support

CRUD::
- Make index and delete operation execute as a single bulk item

Circuit Breakers::
- Add used memory amount to CircuitBreakingException message (#22521)

Cluster::
- Connect to new nodes concurrently

Core::
- Simplify write failure handling (backport of #19105)
- Simplify ElasticsearchException rendering as a XContent
- Remove setLocalNode from ClusterService and TransportService

Engine::
- Replace EngineClosedException with AlreadyClosedExcpetion

Index APIs::
- Indexing: Add shard id to indexing operation listener
- Better error when can't auto create index

Ingest::
- Lazy load the geoip databases

Internal::
- Improve connection closing in `RemoteClusterConnection`
- Remove some more usages of ParseFieldMatcher
- Introduce ToXContentObject interface

Java API::
- prevent NPE when trying to uncompress a null BytesReference

Java High Level REST Client::
- Add parsing from xContent to MainResponse
- Parse elasticsearch exception's root causes
- Add parsing method to BytesRestResponse's error
- Add parsing method for
  ElasticsearchException.generateThrowableXContent()
- Add fromxcontent methods to delete response
- Add parsing methods for UpdateResponse
- Add parsing from xContent to InternalSearchHit and
  InternalSearchHits
- Add fromxcontent methods to index response

Java REST Client::
- move ignore parameter support from yaml test client to low level
  rest client
- Support Preemptive Authentication with RestClient

Logging::
- Expose logs base path

Mapping::
- Improve error message for ipv6 on legacy ip fields

Network::
- Keep the pipeline handler queue small initially

Packaging::
- Introduce Java version check

Plugin Discovery EC2::
- Read ec2 discovery address from aws instance tags

Plugin Lang Painless::
- Generate reference links for painless API
- Painless: Add augmentation to String for base 64

Plugin Repository S3::
- S3 repository: Add named configurations

Plugins::
- Add the ability to define search response listeners in search plugin

Query DSL::
- QueryString and SimpleQueryString Graph Support
- Additional Graph Support in Match Query
- RangeQuery WITHIN case now normalises query

Reindex API::
- Increase visibility of doExecute so it can be used directly
- Improve error message when reindex-from-remote gets bad json

Scripting::
- Expose multi-valued dates to scripts and document painless's date
  functions

Search::
- Add a setting to disable remote cluster connections on a node
- First step towards separating individual search phases
- Add parsing from xContent to SearchProfileShardResults and nested
  classes
- ProfileResult and CollectorResult should print machine readable
  timing information

Settings::
- Improve setting deprecation message
- Add secure settings validation on startup
- Allow comma delimited array settings to have a space after each
  entry
- Allow affix settings to be dynamic / updatable
- Allow affix settings to delegate to actual settings
- Make s3 repository sensitive settings use secure settings

Snapshot/Restore::
- Duplicate snapshot name throws InvalidSnapshotNameException
- Use general cluster state batching mechanism for snapshot state
  updates

Stats::
- Add geo_point to FieldStats

=== Bug fixes

CRUD::
- Fix backport executing ops as single item bulk

Cache::
- Invalidate cached query results if query timed out

Cluster::
- Don't set local node on cluster state used for node join validation
- Allow a cluster state applier to create an observer and wait for a
  better state
- Cluster allocation explain to never return empty response body

Exceptions::
- Stop returning "es." internal exception headers as http response
  headers

Ingest::
- Improve missing ingest processor error
- fix date-processor to a new default year for every new pipeline
  execution

Internal::
- Always restore the ThreadContext for operations delayed due to a
  block
- Fix handling of document failure exception in InternalEngine
  (backport #22718)

Java REST Client::
- RestClient asynchronous execution should not throw exceptions

Mapping::
- Switch include_in_all in multifield to warning
- Fix MapperService StackOverflowError
- Range types causing `GetFieldMappingsIndexRequest` to fail due to
  `NullPointerException` in `RangeFieldMapper.doXContentBody` when
`include_defaults=true` is on the query string
- Disallow introducing illegal object mappings (double '..')

Network::
- Respect promises on pipelined responses
- Ensure that releasing listener is called

Packaging::
- Fall back to non-atomic move when removing plugins

Parent/Child::
- Add null check in case of orphan child document

Plugin Ingest Attachment::
- Remove support for Visio and potm files
- Add missing mime4j library

Plugin Lang Painless::
- Fix Bad Casts In Painless
- Don't allow casting from void to def in painless
- Fix def invoked qualified method refs

Plugins::
- Add check for null pluginName in remove command

Query DSL::
- Fix parsing for `max_determinized_states`

REST::
- [API] change wait_for_completion default according to docs
- HTTP transport stashes the ThreadContext instead of the
  RestController
- Ensure we try to autodetect content type for handlers that support
  plain text
- Fix date format in warning headers
- Correct warning header to be compliant
- Fix search scroll request with a plain text body
- Handle bad HTTP requests
- Properly encode location header

Reindex API::
- Reindex: do not log when can't clear old scroll
- Fix reindex-from-remote from <2.0

Scripting::
- Remove unnecessary Groovy deprecation logging
- Script: Fix value of `ctx._now` to be current epoch time in
  milliseconds

Search::
- Honor max concurrent searches in multi-search
- Avoid stack overflow in multi-search
- Replace blocking calls in ExpandCollapseSearchResponseListener by
  asynchronous requests
- Ensure fixed serialization order of InnerHitBuilder

Settings::
- Fix merge scheduler config settings
- Settings: Fix keystore cli prompting for yes/no to handle console
  returning null
- Expose `search.highlight.term_vector_multi_value` as a node level
  setting
- NPE when no setting name passed to elasticsearch-keystore

Similarities::
- Fix similarity upgrade when "default" similarity is overridden

Stats::
- Avoid overflow when computing total FS stats
- Handle long overflow when adding paths' totals
- Fix control group pattern
- Fix total disk bytes returning negative value

Task Manager::
- Fix hanging cancelling task with no children
- Fix broken TaskInfo.toString()

=== Regressions

Core::
- Source filtering: only accept array items if the previous include
  pattern matches

=== Upgrades

Internal::
- Upgrade to Lucene 6.4.1.
   2017-03-01 15:19:27 by Filip Hajny | Files touched by this commit (3) | Package updated
Log message:
Update databases/elasticsearch to 5.2.2.

5.2.2

- The request circuit breaker, which track the size of in-flight
  requests, was not decrementing its counter when the connection was
  closed by the client before the response could be returned. This could
  result in no further requests being accepted until the node has been
  restarted. All users should upgrade to take advantage of this bug fix.
- The cgroup functionality (for reading OS stats for containers) had a
  bug in the regex for parsing /proc/self/cgroup which prevented nodes
  with multiple hierarchies from starting up.
- Requests which have been delayed by a shard lock might be executed
  later on a different thread which lacks the request context, resulting
  in the requests being incorrectly rejected as unauthorised.
- Removal of an undocumented syntax for include/exclude parameters in
  the terms aggregation broke certain aggregations in Kibana.

5.2.1

- When stored fields are configured with best_compression, we rely on
  JVM garbage collection to reclaim Deflater/Inflater instances. However
  these classes use little JVM memory but may use significant native
  memory, so if may happen that the OS runs out of native memory before
  the JVM collects these unreachable Deflater/Inflater instances.
- Certain queries can hold a reference to the IndexReader that was used
  to build them. When these queries are cached, this reference causes
  Lucene to hold onto segments long after they should have been deleted.