[[release-notes-7.0.0-rc1]]
== {es} version 7.0.0-rc1

Also see <<breaking-changes-7.0,Breaking changes in 7.0.0-rc1>>.

[[breaking-7.0.0-rc1]]
[discrete]
=== Breaking changes

Distributed::
* Remove cluster state size {es-pull}40061[#40061] (issues: {es-issue}39806[#39806], {es-issue}39827[#39827], {es-issue}39951[#39951], {es-issue}40016[#40016])

Features/Features::
* Remove Migration Upgrade and Assistance APIs {es-pull}40075[#40075] (issue: {es-issue}40014[#40014])



[[deprecation-7.0.0-rc1]]
[discrete]
=== Deprecations

Cluster Coordination::
* Deprecate size in cluster state response {es-pull}39951[#39951] (issue: {es-issue}39806[#39806])

Infra/Packaging::
* Deprecate fallback to java on PATH {es-pull}37990[#37990]



[[feature-7.0.0-rc1]]
[discrete]
=== New features

Allocation::
* Node repurpose tool {es-pull}39403[#39403] (issues: {es-issue}37347[#37347], {es-issue}37748[#37748])

Security::
* Switch internal security index to ".security-7" {es-pull}39337[#39337] (issue: {es-issue}39284[#39284])



[[enhancement-7.0.0-rc1]]
[discrete]
=== Enhancements

CCR::
* Reduce retention lease sync intervals {es-pull}40302[#40302]
* Renew retention leases while following {es-pull}39335[#39335] (issues: {es-issue}37165[#37165], {es-issue}38718[#38718])
* Reduce refresh when lookup term in FollowingEngine {es-pull}39184[#39184]
* Integrate retention leases to recovery from remote {es-pull}38829[#38829] (issue: {es-issue}37165[#37165])
* Enable removal of retention leases {es-pull}38751[#38751] (issue: {es-issue}37165[#37165])

Client::
* Fixed required fields and paths list {es-pull}39358[#39358]

Discovery-Plugins::
* Adds connect and read timeouts to discovery-gce {es-pull}28193[#28193] (issue: {es-issue}24313[#24313])

Distributed::
* Introduce retention lease actions {es-pull}38756[#38756] (issue: {es-issue}37165[#37165])
* Add dedicated retention lease exceptions {es-pull}38754[#38754] (issue: {es-issue}37165[#37165])
* Copy retention leases when trim unsafe commits {es-pull}37995[#37995] (issue: {es-issue}37165[#37165])

Docs Infrastructure::
* Align generated release notes with doc standards {es-pull}39234[#39234] (issue: {es-issue}39155[#39155])

Engine::
* Explicitly advance max_seq_no before indexing {es-pull}39473[#39473] (issue: {es-issue}38879[#38879])

Infra/Core::
* Add details about what acquired the shard lock last {es-pull}38807[#38807] (issue: {es-issue}30290[#30290])

Infra/Packaging::
* Use bundled JDK in Docker images {es-pull}40238[#40238]
* Upgrade bundled JDK and Docker images to JDK 12 {es-pull}40229[#40229]
* Bundle java in distributions {es-pull}38013[#38013] (issue: {es-issue}31845[#31845])

Infra/Settings::
* Provide a clearer error message on keystore add {es-pull}39327[#39327] (issue: {es-issue}39324[#39324])

Percolator::
* Make the `type` parameter optional when percolating existing documents. {es-pull}39987[#39987] (issue: {es-issue}39963[#39963])
* Add support for selecting percolator query candidate matches containing geo_point based queries {es-pull}26040[#26040]

SQL::
* Enhance checks for inexact fields {es-pull}39427[#39427] (issue: {es-issue}38501[#38501])
* Change the default precision for CURRENT_TIMESTAMP function {es-pull}39391[#39391] (issue: {es-issue}39288[#39288])



[[bug-7.0.0-rc1]]
[discrete]
=== Bug fixes

Aggregations::
* Skip sibling pipeline aggregators reduction during non-final reduce {es-pull}40101[#40101] (issue: {es-issue}40059[#40059])
* Extend nextDoc to delegate to the wrapped doc-value iterator for date_nanos {es-pull}39176[#39176] (issue: {es-issue}39107[#39107])
* Only create MatrixStatsResults on final reduction {es-pull}38130[#38130] (issue: {es-issue}37587[#37587])

Authentication::
* Allow non super users to create API keys {es-pull}40028[#40028] (issue: {es-issue}40029[#40029])
* Use consistent view of realms for authentication {es-pull}38815[#38815] (issue: {es-issue}30301[#30301])

CCR::
* Safe publication of AutoFollowCoordinator {es-pull}40153[#40153] (issue: {es-issue}38560[#38560])
* Enable reading auto-follow patterns from x-content {es-pull}40130[#40130] (issue: {es-issue}40128[#40128])
* Stop auto-followers on shutdown {es-pull}40124[#40124]
* Protect against the leader index being removed {es-pull}39351[#39351] (issue: {es-issue}39308[#39308])
* Handle the fact that `ShardStats` instance may have no commit or seqno stats {es-pull}38782[#38782] (issue: {es-issue}38779[#38779])
* Fix LocalIndexFollowingIT#testRemoveRemoteConnection() test {es-pull}38709[#38709] (issue: {es-issue}38695[#38695])

CRUD::
* Cascading primary failure lead to MSU too low {es-pull}40249[#40249]

Cluster Coordination::
* Fix node tool cleanup {es-pull}39389[#39389]
* Avoid serialising state if it was already serialised {es-pull}39179[#39179]

Distributed::
* Ignore waitForActiveShards when syncing leases {es-pull}39224[#39224] (issue: {es-issue}39089[#39089])
* Fix synchronization in LocalCheckpointTracker#contains {es-pull}38755[#38755] (issues: {es-issue}33871[#33871], {es-issue}38633[#38633])

Engine::
* Bubble up exception when processing NoOp {es-pull}39338[#39338] (issue: {es-issue}38898[#38898])
* ReadOnlyEngine should update translog recovery state information {es-pull}39238[#39238]

Features/Features::
* Only count some fields types for deprecation check {es-pull}40166[#40166]

Features/ILM::
* Handle failure to release retention leases in ILM {es-pull}39281[#39281] (issue: {es-issue}39181[#39181])

Features/Watcher::
* Use non-ILM template setting up watch history template & ILM disabled {es-pull}39325[#39325] (issue: {es-issue}38805[#38805])
* Only flush Watcher's bulk processor if Watcher is enabled {es-pull}38803[#38803] (issue: {es-issue}38798[#38798])

Infra/Core::
* Correct name of basic_date_time_no_millis {es-pull}39367[#39367]

Infra/Packaging::
* Some elasticsearch-cli tools could not be run not from ES_HOME {es-pull}39937[#39937]
* Obsolete pre 7.0 noarch package in rpm {es-pull}39472[#39472] (issue: {es-issue}39414[#39414])
* Suppress error message when `/proc/sys/vm/max_map_count` is not exists. {es-pull}35933[#35933]

Infra/REST API::
* Fix #38623 remove xpack namespace REST API {es-pull}38625[#38625]
* Remove the "xpack" namespace from the REST API {es-pull}38623[#38623]

Recovery::
* Create retention leases file during recovery {es-pull}39359[#39359] (issue: {es-issue}37165[#37165])

SQL::
* Add missing handling of IP field in JDBC {es-pull}40384[#40384] (issue: {es-issue}40358[#40358])
* Fix metric aggs on date/time to not return double {es-pull}40377[#40377] (issues: {es-issue}39492[#39492], {es-issue}40376[#40376])
* CAST supports both SQL and ES types {es-pull}40365[#40365] (issue: {es-issue}40282[#40282])
* Fix RLIKE bug and improve testing for RLIKE statement {es-pull}40354[#40354] (issues: {es-issue}34609[#34609], {es-issue}39931[#39931])
* Unwrap the first value in an array in case of array leniency {es-pull}40318[#40318] (issue: {es-issue}40296[#40296])
* Preserve original source for cast/convert function {es-pull}40271[#40271] (issue: {es-issue}40239[#40239])
* Fix LIKE function equality by considering its pattern as well {es-pull}40260[#40260] (issue: {es-issue}39931[#39931])
* Fix issue with optimization on queries with ORDER BY/LIMIT {es-pull}40256[#40256] (issue: {es-issue}40211[#40211])
* Rewrite ROUND and TRUNCATE functions with a different optional parameter handling method {es-pull}40242[#40242] (issue: {es-issue}40001[#40001])
* Fix issue with getting DATE type in JDBC {es-pull}40207[#40207]
* Fix issue with date columns returned always in UTC {es-pull}40163[#40163] (issue: {es-issue}40152[#40152])
* Add multi_value_field_leniency inside FieldHitExtractor {es-pull}40113[#40113] (issue: {es-issue}39700[#39700])
* Fix incorrect ordering of groupings (GROUP BY) based on orderings (ORDER BY) {es-pull}40087[#40087] (issue: {es-issue}39956[#39956])
* Fix bug with JDBC timezone setting and DATE type {es-pull}39978[#39978] (issue: {es-issue}39915[#39915])
* Use underlying exact field for LIKE/RLIKE {es-pull}39443[#39443] (issue: {es-issue}39442[#39442])

Search::
* Serialize top-level pipeline aggs as part of InternalAggregations {es-pull}40177[#40177] (issues: {es-issue}40059[#40059], {es-issue}40101[#40101])
* CCS: Skip empty search hits when minimizing round-trips {es-pull}40098[#40098] (issues: {es-issue}32125[#32125], {es-issue}40067[#40067])
* CCS: Disable minimizing round-trips when dfs is requested {es-pull}40044[#40044] (issue: {es-issue}32125[#32125])



[[upgrade-7.0.0-rc1]]
[discrete]
=== Upgrades

Discovery-Plugins::
* Bump jackson-databind version for AWS SDK {es-pull}39183[#39183]

Engine::
* Upgrade to Lucene 8.0.0-snapshot-ff9509a8df {es-pull}39350[#39350]
* Upgrade to Lucene 8.0.0 {es-pull}39992[#39992] (issue: {es-issue}39640[#39640])

Features/Ingest::
* Bump jackson-databind version for ingest-geoip {es-pull}39182[#39182]

Security::
* Upgrade the bouncycastle dependency to 1.61 {es-pull}40017[#40017] (issue: {es-issue}40011[#40011])


