[[release-notes-8.2.1]]
== {es} version 8.2.1

Also see <<breaking-changes-8.2,Breaking changes in 8.2>>.
[[known-issues-8.2.1]]
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=== Known issues

include::8.0.0.asciidoc[tag=jackson-filtering-bug]
[[bug-8.2.1]]
[float]
=== Bug fixes

Aggregations::
* Fix `AdaptingAggregator` `toString` method {es-pull}86042[#86042]
* Less complexity in after-key parsing for unmapped fields {es-pull}86359[#86359] (issue: {es-issue}85928[#85928])

Authentication::
* Ensure authentication is wire compatible when setting user {es-pull}86741[#86741] (issue: {es-issue}86716[#86716])

Cluster Coordination::
* Avoid breaking add/clear voting exclusions {es-pull}86657[#86657]

Geo::
* Fix bounded hexagonal grids when they contain the bin on one of the poles {es-pull}86460[#86460]
* Fix mvt polygon orientation {es-pull}86555[#86555] (issue: {es-issue}86560[#86560])

ILM+SLM::
* Fix `max_primary_shard_size` resize factor math {es-pull}86897[#86897]
* Reroute after migrating to data tiers routing {es-pull}86574[#86574] (issue: {es-issue}86572[#86572])

Infra/Core::
* Fix `assertDefaultThreadContext` enumerating allowed headers {es-pull}86262[#86262]
* Forward port MDP deprecation info API {es-pull}86103[#86103]
* Make data directories work with symlinks again {es-pull}85878[#85878] (issue: {es-issue}85701[#85701])
* Set autoexpand replicas on Fleet actions data stream {es-pull}85511[#85511]
* Do not autocreate alias for non-primary system indices {es-pull}85977[#85977] (issue: {es-issue}85072[#85072])

Ingest::
* Don't download geoip databases if geoip system index is blocked {es-pull}86842[#86842]
* Fix NPE when using object field as match field for enrich policy {es-pull}86089[#86089] (issue: {es-issue}86058[#86058])
* Handle `.geoip_databases` being an alias or a concrete index {es-pull}85792[#85792] (issue: {es-issue}85756[#85756])

Machine Learning::
* Adjust memory overhead for `PyTorch` models {es-pull}86416[#86416]
* Fix `max_model_memory_limit` reported by `_ml/info` when autoscaling is enabled {es-pull}86660[#86660]
* Improve reliability of job stats in larger clusters {es-pull}86305[#86305]
* Make autoscaling and task assignment use same memory staleness definition {es-pull}86632[#86632] (issue: {es-issue}86616[#86616])
* Fix edge case which could cause the model bounds to inflate after detecting seasonality {ml-pull}2261[#2261]

Packaging::
* Fix edge case where user-defined heap settings are ignored {es-pull}86438[#86438] (issue: {es-issue}86431[#86431])

Security::
* Authentication.token now uses version from the existing authentication {es-pull}85978[#85978]

Snapshot/Restore::
* Better failure for source-only snapshots of partially/fully mounted indices {es-pull}86207[#86207]
* Check if searchable snapshots cache pre-allocation is successful in Windows {es-pull}86192[#86192] (issue: {es-issue}85725[#85725])
* Delay searchable snapshot allocation during shutdown {es-pull}86153[#86153] (issue: {es-issue}85052[#85052])
* Support generating AWS role session name in case it's not provided {es-pull}86255[#86255]

Stats::
* Correctly calculate disk usage for frozen data tier telemetry {es-pull}86580[#86580] (issue: {es-issue}86055[#86055])

[[upgrade-8.2.1]]
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=== Upgrades

Packaging::
* Switch to OpenJDK and upgrade to 18.0.1 {es-pull}86554[#86554]