6.6.2 release notes.
+[[release-notes-6.6.2]]
+== {es} version 6.6.1
+
+coming[6.6.2]
+
+Also see <<breaking-changes-6.6, Breaking changes in 6.6>>.
+
+[[breaking-6.6.2]]
+[float]
+=== Breaking changes
+
+Authentication::
+* Disable BWC mode in TokenService by default {pull}38881[#38881]
+
+
+
+[[enhancement-6.6.2]]
+[float]
+=== Enhancements
+
+SQL::
+* SQL: Enhance checks for inexact fields {pull}39427[#39427] (issue: {issue}38501[#38501])
+* SQL: add "validate.properties" property to JDBC's allowed list of settings {pull}39050[#39050] (issue: {issue}38068[#38068])
+
+
+
+[[bug-6.6.2]]
+[float]
+=== Bug fixes
+
+Authentication::
+* Use consistent view of realms for authentication {pull}38815[#38815] (issue: {issue}30301[#30301])
+
+Engine::
+* Bubble up exception when processing NoOp {pull}39338[#39338] (issue: {issue}38898[#38898])
+* Advance max_seq_no before add operation to Lucene {pull}38879[#38879] (issue: {issue}31629[#31629])
+
+Features/Watcher::
+* Only flush Watcher's bulk processor if Watcher is enabled {pull}38803[#38803] (issue: {issue}38798[#38798])
+
+Machine Learning::
+* [ML] Stop the ML memory tracker before closing node {pull}39111[#39111] (issue: {issue}37117[#37117])
+
+SQL::
+* SQL: Fix merging of incompatible multi-fields {pull}39560[#39560] (issue: {issue}39547[#39547])
+* SQL: ignore UNSUPPORTED fields for JDBC and ODBC modes in 'SYS COLUMNS' {pull}39518[#39518] (issue: {issue}39471[#39471])
+* SQL: Use underlying exact field for LIKE/RLIKE {pull}39443[#39443] (issue: {issue}39442[#39442])
+* SQL: enforce JDBC driver - ES server version parity {pull}38972[#38972] (issue: {issue}38775[#38775])
+* SQL: fall back to using the field name for column label {pull}38842[#38842] (issue: {issue}38831[#38831])
+* SQL: normalized keywords shouldn't be allowed for groupings and sorting [ISSUE] {pull}35203[#35203]
+
+Search::
+* Fix Fuzziness#asDistance(String) {pull}39643[#39643] (issue: {issue}39614[#39614])
+* Fix simple query string serialization conditional {pull}38960[#38960] (issues: {issue}21504[#21504], {issue}38889[#38889])
[[release-notes-6.6.1]]
== {es} version 6.6.1
