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fix: Use group_by in Polars backend aggregation - #6965

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haoxu0 merged 4 commits into
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YHC66:fix-polars-backend-group-by
Oct 9, 2026
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fix: Use group_by in Polars backend aggregation#6965
haoxu0 merged 4 commits into
feast-dev:masterfrom
YHC66:fix-polars-backend-group-by

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@YHC66

@YHC66 YHC66 commented Oct 7, 2026

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What this PR does / why we need it:

PolarsBackend.groupby_agg calls df.groupby(...). polars renamed that method to group_by in 0.19 and removed the old name in 1.0, so with any current polars release (1.x and the new 2.0.0) the call raises:

AttributeError: 'DataFrame' object has no attribute 'groupby'. Did you mean: 'group_by'?

This means the local compute engine configured with backend: polars fails as soon as it runs a LocalAggregationNode. polars is not installed in CI, so the backend has no test coverage today (the factory tests mock it out).

The fix switches to group_by. A new test runs LocalAggregationNode with PolarsBackend (sum and nunique, so the n_unique mapping is covered too); it uses pytest.importorskip("polars"), so it is skipped where polars isn't installed.

Which issue(s) this PR fixes:

No existing issue; found while running the compute engine tests with polars installed.

Checks

  • I've made sure the tests are passing.
  • My commits are signed off (git commit -s)
  • My PR title follows conventional commits format

Testing Strategy

  • Unit tests
  • Integration tests
  • Manual tests
  • Testing is not required for this change

Local results (Python 3.12, CI requirements):

Setup Result
master + polars 2.0.0, new test fails with the AttributeError above
this branch + polars 2.0.0 tests/unit/infra/compute_engines: 117 passed
this branch + polars 1.34.0 local/test_nodes.py: 11 passed
this branch, polars not installed 116 passed, 1 skipped

ruff check, ruff format --check and mypy on the changed files pass.

Misc

While testing I also noticed that LocalFilterNode uses pandas-style boolean indexing (df[df[ts] <= df[entity_ts]]), which polars rejects, so historical retrieval with the polars backend still fails at that node. I kept this PR to the aggregation fix; happy to follow up on the filter node if that's useful.

@YHC66
fix: Use group_by in Polars backend aggregation
dea6862 
polars removed DataFrame.groupby in 1.0 in favour of group_by, so
PolarsBackend.groupby_agg raised AttributeError and any aggregation run
by the local compute engine with backend=polars failed.

Signed-off-by: Yihang Chen <yhc0720@berkeley.edu>
@YHC66
YHC66 requested a review from a team as a code owner October 7, 2026 17:19
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@haoxu0

haoxu0 commented Oct 8, 2026 •
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is this backward compatible?

@YHC66

YHC66 commented Oct 8, 2026

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Yes, for any polars version that still exists in practice. DataFrame.group_by was introduced in polars 0.19.0 (Aug 2023), and groupby was deprecated in that release and removed in 1.0. I checked locally:

  • polars 0.18.15: only groupby exists, so this change would break there
  • polars 0.19.0 / 0.20.31: both exist, group_by works, groupby emits a DeprecationWarning
  • polars >= 1.0: only group_by exists, so the current code raises AttributeError

So the change keeps working on 0.19+ and fixes 1.x; the only versions it drops are pre-0.19 releases from over three years ago. Feast doesn't declare polars as a dependency or set a minimum version. If you'd rather keep pre-0.19 support anyway, I can add a getattr fallback to groupby, just let me know.

The one failure in unit-test-python (3.10, ubuntu-latest) is test_chronon_online_store.py::test_online_read_http_retry_policy[1-500-2-True] timing out in server.shutdown(), which doesn't touch the polars backend.

@haoxu0
haoxu0 merged commit 7b9fad2 into feast-dev:master Oct 9, 2026
23 of 24 checks passed
@YHC66 YHC66 mentioned this pull request Oct 10, 2026
Merged
4 of 7 tasks
ntkathole pushed a commit that referenced this pull request Oct 13, 2026
@feast-ci-bot
chore(release): release 0.67.0
2dfb9e6 
# [0.67.0](v0.66.0...v0.67.0) (2026-10-13)

### Bug Fixes

* Allow dill 0.4 so UDF serialization works on Python 3.14 ([#6858](#6858)) ([139704f](139704f))
* Allow serving features while a feature view is MATERIALIZING ([#6789](#6789)) ([e2d7fe2](e2d7fe2)), closes [#6780](#6780)
* Allowlist the pinned commit SHA flagged by detect-secrets ([4b81d18](4b81d18))
* Apply point-in-time filter correctly with the Polars backend ([#6992](#6992)) ([01224d0](01224d0))
* Authorize registry server writes before deserializing UDFs ([e0ef16e](e0ef16e))
* Automate versioned documentation publication ([#6763](#6763)) ([5ad5592](5ad5592)), closes [#6762](#6762)
* Avoid NumPy generic-unit deprecation when importing feast.type_map ([5fea698](5fea698))
* Bind metrics, REST registry, ui, and lineage servers dual-stack ([#6886](#6886)) ([8d2773c](8d2773c))
* Bound Arrow Flight batch size in the offline server ([#6896](#6896)) ([d169238](d169238))
* Compute std and var correctly for tiled aggregations ([213a130](213a130))
* Convert PdfBytes values to protos like ImageBytes ([#6968](#6968)) ([af20fe4](af20fe4))
* Decode fixed_size_list as the matching Feast list value type ([#6944](#6944)) ([8cfe891](8cfe891))
* Do not log /metrics requests from the pre-fork metrics server thread ([7087f1f](7087f1f)), closes [#6928](#6928)
* Don't return from finally blocks in REST registry helpers ([d7cb4d0](d7cb4d0))
* Encode non-finite floats in feature server JSON responses ([#6930](#6930)) ([211ecb8](211ecb8))
* Feature freshness logic updated ([#6765](#6765)) ([f0bc070](f0bc070))
* Fix monitoring auth ([015cc84](015cc84))
* Handle non-nanosecond timestamps in tiled aggregations ([b8989cb](b8989cb))
* Improve feature list column sizing ([#6793](#6793)) ([2573693](2573693))
* Include vector attributes in Field equality ([#6934](#6934)) ([298c3f6](298c3f6))
* Increase feast container probe timeouts to avoid false restarts ([e8dbd50](e8dbd50))
* Infer the tensor type from retrieved values in to_tensor ([a03e323](a03e323))
* Infer timestamps for datetime columns in any unit or timezone ([810391f](810391f))
* Infer vector width when vector_length is undeclared ([0056565](0056565)), closes [#6907](#6907)
* Initialize auth managers in standalone lineage server ([#6873](#6873)) ([ecd0d38](ecd0d38))
* Keep a zero watermark delay threshold on a Kafka source ([e2e28c7](e2e28c7))
* Keep entity rows apart in the ibis point-in-time join ([a87c070](a87c070))
* Keep the BatchFeatureView type and settings when copying it ([#6989](#6989)) ([013fc57](013fc57))
* Keep tiling, offline and stream engine settings when copying a StreamFeatureView ([fac0f88](fac0f88))
* Limit tiled max and min aggregations to the window ([2583c45](2583c45))
* Load Milvus collections once instead of on every query ([#6882](#6882)) ([f9e91fa](f9e91fa))
* Make vector length validation reachable, schema-driven and vectorized ([#6909](#6909)) ([29af8c0](29af8c0)), closes [#6907](#6907)
* Map INT32_LIST, PDF_BYTES and IMAGE_BYTES type names to their ValueType ([8c1e825](8c1e825))
* Map narrow and unsigned Arrow integer types to Feast value types ([#6960](#6960)) ([ae74360](ae74360))
* Map Spark smallint and tinyint columns to INT32 ([9d42729](9d42729))
* Map SQL Server bigint to INT64 and float to DOUBLE ([6d15533](6d15533))
* Map Trino DECIMAL columns to pyarrow decimal128 ([155bc24](155bc24))
* Normalize Arrow-backed dtypes from Ray Dataset.to_pandas() for pyarrow >=25 compatibility ([#6916](#6916)) ([374f1d7](374f1d7))
* **operator:** Set grpc appProtocol on the offline Service port ([f9dcfb5](f9dcfb5))
* Pin expected tensor to same device in online retrieval test ([#6777](#6777)) ([1f2584d](1f2584d))
* Preserve an unset aggregation time window across a proto round-trip ([2000379](2000379))
* Preserve entity row order in precomputed reads ([ce37029](ce37029))
* Pull the MinIO test image from pgsty/minio ([fe27230](fe27230))
* Pull the MinIO test image from quay ([#6838](#6838)) ([367001b](367001b))
* Raise Trino monitoring query errors other than a missing table ([6161766](6161766))
* Read Kafka and Kinesis sources without a batch source from proto ([a620f5c](a620f5c))
* Read naive datetimes as UTC in UnixTimestamp values ([bc703d9](bc703d9))
* Record which storage class wrote a custom_storage payload ([#6988](#6988)) ([c0545f7](c0545f7))
* Refresh the SQL registry cache after deleting a data source ([66c55e3](66c55e3))
* Refresh the SQL registry cache after deleting a permission ([6b212f5](6b212f5))
* Reject unknown resource types and actions in the REST permission API ([a5eaa36](a5eaa36))
* Remove pip install command from Redis GLIDE docstring ([66ff990](66ff990))
* Remove runtime pip install hints from mlflow errors ([dd9f099](dd9f099))
* Remove unsupported vector_len from PostgreSQL tutorial config ([fcc9a85](fcc9a85))
* Repair Chronon operator validation and Pixi CI setup ([#6947](#6947)) ([3710f78](3710f78))
* Report Dask monitoring read errors instead of no data ([81673d9](81673d9))
* Resolve feature view batch source name against registry ([f8883d0](f8883d0))
* Restrict UI server CORS to trusted origins ([#6986](#6986)) ([5e7ef3e](5e7ef3e))
* Return feature_view_metadata from the REST feature server ([#6927](#6927)) ([bc5aeef](bc5aeef))
* Serve aliased on demand feature views in feature services ([823b92e](823b92e))
* Snapshot tag filters in registry cache keys ([81e1546](81e1546))
* Stabilize materialization checks across hour boundaries ([#6948](#6948)) ([acadb17](acadb17))
* Stop the Couchbase online store reporting failed writes as written ([b3f3c98](b3f3c98))
* Support SQL registry dump ([b60f9c7](b60f9c7))
* Treat datetimes with a None utcoffset as naive ([687bee8](687bee8))
* Unwrap SecretStr tokens when building Trino auth objects ([#6771](#6771)) ([922db5c](922db5c))
* Use a valid ShuffleStrategy for the Ray DatasetContext ([6259f5c](6259f5c))
* Use do_exchange for offline server reads to support HPA ([bae07fc](bae07fc))
* Use group_by in Polars backend aggregation ([#6965](#6965)) ([7b9fad2](7b9fad2))
* Use upstream kubectl image as feast-operator CronJob default ([d6cc1dc](d6cc1dc))
* Use UTC end bound and correct docs for disable_event_timestamp ([#6956](#6956)) ([cc07c82](cc07c82)), closes [#6936](#6936)

### Features

* Add a non-JVM read path for Lance data sources ([#6943](#6943)) ([e2a53bb](e2a53bb)), closes [#6925](#6925) [#5782](#5782) [#6909](#6909)
* Add a non-JVM write path for Lance data sources ([#6945](#6945)) ([f754323](f754323)), closes [#6943](#6943) [#6909](#6909)
* Add Chronon online and offline store integrations ([#6188](#6188)) ([dd059c6](dd059c6))
* Add consistency_level to the Milvus online store config ([97296c1](97296c1))
* Add dualStack server option to the Feast operator ([#6887](#6887)) ([725a147](725a147)), closes [#6977](#6977)
* Add Lance optional dependencies ([#6958](#6958)) ([20bc993](20bc993))
* Add LanceFormat table format with version/tag pinning ([1196e22](1196e22)), closes [#5650](#5650)
* Add MLflow as a first-class offline DataSource for Feast ([#6702](#6702)) ([3667772](3667772))
* Add optional GLIDE client for Redis online reads ([#6870](#6870)) ([6e9a532](6e9a532))
* Add quality monitoring features for Trino offline store ([#6779](#6779)) ([9340545](9340545))
* Add SavedDatasetLanceStorage ([1118d3e](1118d3e))
* Add standalone MCP server as a first-class component ([0efab5c](0efab5c)), closes [python-keycloak#623](https://github.com/python-keycloak/issues/623)
* Add structured audit logging for MCP feature server ([#6456](#6456)) ([640ac70](640ac70))
* Add Trino compute engine for batch retrieval and materialization ([#6898](#6898)) ([11a47b4](11a47b4))
* Batch Postgres online reads across feature views ([#6832](#6832)) ([514bee7](514bee7)), closes [#3259](#3259)
* **bigtable:** Make write batch size and concurrency configurable ([#6847](#6847)) ([5388522](5388522))
* Bucket feature count labels in latency metrics ([#6811](#6811)) ([d9ea120](d9ea120))
* Expose runtime version in Feast UI ([#6843](#6843)) ([fa8f06b](fa8f06b))
* Make Milvus index and search params configurable ([ef743ff](ef743ff))
* Offline write batch for IcebergSource ([5be5ed0](5be5ed0))
* OpenLineage consumer improvements - dataset versioning, column lineage, ownership ([69f294e](69f294e))
* **operator:** Add tolerations and nodeSelector to the FeatureStore CR ([#6741](#6741)) ([03dac6f](03dac6f))
* Serve the MCP server dual-stack on --host :: ([4fc9726](4fc9726))
* Support Milvus partition keys in the Milvus online store ([0ed3285](0ed3285))
* Support token, uri and db_name in the Milvus online store ([c5efecd](c5efecd))
* Version-pinning for FeatureService (online + offline) ([#6718](#6718)) ([787845a](787845a))

### Performance Improvements

* Avoid pandas copy in Spark reads ([#6878](#6878)) ([4771156](4771156))
* Decouple metrics HTTP server into a dedicated child process ([#6855](#6855)) ([0b621de](0b621de))
* Reduce online serving hot-path overhead from metrics and audit logging ([5ee7ee3](5ee7ee3))
@YHC66 YHC66 mentioned this pull request Oct 13, 2026
Open
4 of 7 tasks
ntkathole added a commit to opendatahub-io/feast that referenced this pull request Oct 14, 2026
@ntkathole @Srihari1192
@cursoragent @feast-ci-bot
fix: Merge upstream feast-dev/feast master - resolve CSV conflict (#247)
2b0b7d7 
* fix: Increase feast container probe timeouts to avoid false restarts

Signed-off-by: Srihari <svenkata@redhat.com>

* chore: Remove unused hermeto offline tree and sdist requirement locks (feast-dev#6987)

* chore: Remove unused multicloud hermeto offline build tree

Drop sdk/python/feast/infra/feature_servers/multicloud/offline/, which only
supported local hermeto/arrow-from-source and RPM lock offline image builds
and is unused by Makefile CI, GitHub Actions, or the standard feature-server
Dockerfiles. Also clear related .secrets.baseline entries.

Signed-off-by: ntkathole <nikhilkathole2683@gmail.com>
Co-authored-by: Cursor <cursoragent@cursor.com>

* chore: Drop unused minimal-sdist requirement locks

Remove py3.10–3.12 minimal-sdist(-build) lockfiles, stop generating them
in lock-python-dependencies-all, and delete the minimal-sdist-build extra.
They only supported hermeto build-from-sdist offline image builds.

Signed-off-by: ntkathole <nikhilkathole2683@gmail.com>
Co-authored-by: Cursor <cursoragent@cursor.com>

* chore: Refresh pixi.lock after removing minimal-sdist-build

Keep pixi install --locked in sync with the pyproject.toml optional
dependency change so ray/duckdb CI environments can install.

Signed-off-by: ntkathole <nikhilkathole2683@gmail.com>
Co-authored-by: Cursor <cursoragent@cursor.com>

---------

Signed-off-by: ntkathole <nikhilkathole2683@gmail.com>
Co-authored-by: Cursor <cursoragent@cursor.com>

* chore(release): release 0.67.0

# [0.67.0](feast-dev/feast@v0.66.0...v0.67.0) (2026-10-13)

### Bug Fixes

* Allow dill 0.4 so UDF serialization works on Python 3.14 ([feast-dev#6858](feast-dev#6858)) ([139704f](feast-dev@139704f))
* Allow serving features while a feature view is MATERIALIZING ([feast-dev#6789](feast-dev#6789)) ([e2d7fe2](feast-dev@e2d7fe2)), closes [feast-dev#6780](feast-dev#6780)
* Allowlist the pinned commit SHA flagged by detect-secrets ([4b81d18](feast-dev@4b81d18))
* Apply point-in-time filter correctly with the Polars backend ([feast-dev#6992](feast-dev#6992)) ([01224d0](feast-dev@01224d0))
* Authorize registry server writes before deserializing UDFs ([e0ef16e](feast-dev@e0ef16e))
* Automate versioned documentation publication ([feast-dev#6763](feast-dev#6763)) ([5ad5592](feast-dev@5ad5592)), closes [feast-dev#6762](feast-dev#6762)
* Avoid NumPy generic-unit deprecation when importing feast.type_map ([5fea698](feast-dev@5fea698))
* Bind metrics, REST registry, ui, and lineage servers dual-stack ([feast-dev#6886](feast-dev#6886)) ([8d2773c](feast-dev@8d2773c))
* Bound Arrow Flight batch size in the offline server ([feast-dev#6896](feast-dev#6896)) ([d169238](feast-dev@d169238))
* Compute std and var correctly for tiled aggregations ([213a130](feast-dev@213a130))
* Convert PdfBytes values to protos like ImageBytes ([feast-dev#6968](feast-dev#6968)) ([af20fe4](feast-dev@af20fe4))
* Decode fixed_size_list as the matching Feast list value type ([feast-dev#6944](feast-dev#6944)) ([8cfe891](feast-dev@8cfe891))
* Do not log /metrics requests from the pre-fork metrics server thread ([7087f1f](feast-dev@7087f1f)), closes [feast-dev#6928](feast-dev#6928)
* Don't return from finally blocks in REST registry helpers ([d7cb4d0](feast-dev@d7cb4d0))
* Encode non-finite floats in feature server JSON responses ([feast-dev#6930](feast-dev#6930)) ([211ecb8](feast-dev@211ecb8))
* Feature freshness logic updated ([feast-dev#6765](feast-dev#6765)) ([f0bc070](feast-dev@f0bc070))
* Fix monitoring auth ([015cc84](feast-dev@015cc84))
* Handle non-nanosecond timestamps in tiled aggregations ([b8989cb](feast-dev@b8989cb))
* Improve feature list column sizing ([feast-dev#6793](feast-dev#6793)) ([2573693](feast-dev@2573693))
* Include vector attributes in Field equality ([feast-dev#6934](feast-dev#6934)) ([298c3f6](feast-dev@298c3f6))
* Increase feast container probe timeouts to avoid false restarts ([e8dbd50](feast-dev@e8dbd50))
* Infer the tensor type from retrieved values in to_tensor ([a03e323](feast-dev@a03e323))
* Infer timestamps for datetime columns in any unit or timezone ([810391f](feast-dev@810391f))
* Infer vector width when vector_length is undeclared ([0056565](feast-dev@0056565)), closes [feast-dev#6907](feast-dev#6907)
* Initialize auth managers in standalone lineage server ([feast-dev#6873](feast-dev#6873)) ([ecd0d38](feast-dev@ecd0d38))
* Keep a zero watermark delay threshold on a Kafka source ([e2e28c7](feast-dev@e2e28c7))
* Keep entity rows apart in the ibis point-in-time join ([a87c070](feast-dev@a87c070))
* Keep the BatchFeatureView type and settings when copying it ([feast-dev#6989](feast-dev#6989)) ([013fc57](feast-dev@013fc57))
* Keep tiling, offline and stream engine settings when copying a StreamFeatureView ([fac0f88](feast-dev@fac0f88))
* Limit tiled max and min aggregations to the window ([2583c45](feast-dev@2583c45))
* Load Milvus collections once instead of on every query ([feast-dev#6882](feast-dev#6882)) ([f9e91fa](feast-dev@f9e91fa))
* Make vector length validation reachable, schema-driven and vectorized ([feast-dev#6909](feast-dev#6909)) ([29af8c0](feast-dev@29af8c0)), closes [feast-dev#6907](feast-dev#6907)
* Map INT32_LIST, PDF_BYTES and IMAGE_BYTES type names to their ValueType ([8c1e825](feast-dev@8c1e825))
* Map narrow and unsigned Arrow integer types to Feast value types ([feast-dev#6960](feast-dev#6960)) ([ae74360](feast-dev@ae74360))
* Map Spark smallint and tinyint columns to INT32 ([9d42729](feast-dev@9d42729))
* Map SQL Server bigint to INT64 and float to DOUBLE ([6d15533](feast-dev@6d15533))
* Map Trino DECIMAL columns to pyarrow decimal128 ([155bc24](feast-dev@155bc24))
* Normalize Arrow-backed dtypes from Ray Dataset.to_pandas() for pyarrow >=25 compatibility ([feast-dev#6916](feast-dev#6916)) ([374f1d7](feast-dev@374f1d7))
* **operator:** Set grpc appProtocol on the offline Service port ([f9dcfb5](feast-dev@f9dcfb5))
* Pin expected tensor to same device in online retrieval test ([feast-dev#6777](feast-dev#6777)) ([1f2584d](feast-dev@1f2584d))
* Preserve an unset aggregation time window across a proto round-trip ([2000379](feast-dev@2000379))
* Preserve entity row order in precomputed reads ([ce37029](feast-dev@ce37029))
* Pull the MinIO test image from pgsty/minio ([fe27230](feast-dev@fe27230))
* Pull the MinIO test image from quay ([feast-dev#6838](feast-dev#6838)) ([367001b](feast-dev@367001b))
* Raise Trino monitoring query errors other than a missing table ([6161766](feast-dev@6161766))
* Read Kafka and Kinesis sources without a batch source from proto ([a620f5c](feast-dev@a620f5c))
* Read naive datetimes as UTC in UnixTimestamp values ([bc703d9](feast-dev@bc703d9))
* Record which storage class wrote a custom_storage payload ([feast-dev#6988](feast-dev#6988)) ([c0545f7](feast-dev@c0545f7))
* Refresh the SQL registry cache after deleting a data source ([66c55e3](feast-dev@66c55e3))
* Refresh the SQL registry cache after deleting a permission ([6b212f5](feast-dev@6b212f5))
* Reject unknown resource types and actions in the REST permission API ([a5eaa36](feast-dev@a5eaa36))
* Remove pip install command from Redis GLIDE docstring ([66ff990](feast-dev@66ff990))
* Remove runtime pip install hints from mlflow errors ([dd9f099](feast-dev@dd9f099))
* Remove unsupported vector_len from PostgreSQL tutorial config ([fcc9a85](feast-dev@fcc9a85))
* Repair Chronon operator validation and Pixi CI setup ([feast-dev#6947](feast-dev#6947)) ([3710f78](feast-dev@3710f78))
* Report Dask monitoring read errors instead of no data ([81673d9](feast-dev@81673d9))
* Resolve feature view batch source name against registry ([f8883d0](feast-dev@f8883d0))
* Restrict UI server CORS to trusted origins ([feast-dev#6986](feast-dev#6986)) ([5e7ef3e](feast-dev@5e7ef3e))
* Return feature_view_metadata from the REST feature server ([feast-dev#6927](feast-dev#6927)) ([bc5aeef](feast-dev@bc5aeef))
* Serve aliased on demand feature views in feature services ([823b92e](feast-dev@823b92e))
* Snapshot tag filters in registry cache keys ([81e1546](feast-dev@81e1546))
* Stabilize materialization checks across hour boundaries ([feast-dev#6948](feast-dev#6948)) ([acadb17](feast-dev@acadb17))
* Stop the Couchbase online store reporting failed writes as written ([b3f3c98](feast-dev@b3f3c98))
* Support SQL registry dump ([b60f9c7](feast-dev@b60f9c7))
* Treat datetimes with a None utcoffset as naive ([687bee8](feast-dev@687bee8))
* Unwrap SecretStr tokens when building Trino auth objects ([feast-dev#6771](feast-dev#6771)) ([922db5c](feast-dev@922db5c))
* Use a valid ShuffleStrategy for the Ray DatasetContext ([6259f5c](feast-dev@6259f5c))
* Use do_exchange for offline server reads to support HPA ([bae07fc](feast-dev@bae07fc))
* Use group_by in Polars backend aggregation ([feast-dev#6965](feast-dev#6965)) ([7b9fad2](feast-dev@7b9fad2))
* Use upstream kubectl image as feast-operator CronJob default ([d6cc1dc](feast-dev@d6cc1dc))
* Use UTC end bound and correct docs for disable_event_timestamp ([feast-dev#6956](feast-dev#6956)) ([cc07c82](feast-dev@cc07c82)), closes [feast-dev#6936](feast-dev#6936)

### Features

* Add a non-JVM read path for Lance data sources ([feast-dev#6943](feast-dev#6943)) ([e2a53bb](feast-dev@e2a53bb)), closes [feast-dev#6925](feast-dev#6925) [feast-dev#5782](feast-dev#5782) [feast-dev#6909](feast-dev#6909)
* Add a non-JVM write path for Lance data sources ([feast-dev#6945](feast-dev#6945)) ([f754323](feast-dev@f754323)), closes [feast-dev#6943](feast-dev#6943) [feast-dev#6909](feast-dev#6909)
* Add Chronon online and offline store integrations ([feast-dev#6188](feast-dev#6188)) ([dd059c6](feast-dev@dd059c6))
* Add consistency_level to the Milvus online store config ([97296c1](feast-dev@97296c1))
* Add dualStack server option to the Feast operator ([feast-dev#6887](feast-dev#6887)) ([725a147](feast-dev@725a147)), closes [feast-dev#6977](feast-dev#6977)
* Add Lance optional dependencies ([feast-dev#6958](feast-dev#6958)) ([20bc993](feast-dev@20bc993))
* Add LanceFormat table format with version/tag pinning ([1196e22](feast-dev@1196e22)), closes [feast-dev#5650](feast-dev#5650)
* Add MLflow as a first-class offline DataSource for Feast ([feast-dev#6702](feast-dev#6702)) ([3667772](feast-dev@3667772))
* Add optional GLIDE client for Redis online reads ([feast-dev#6870](feast-dev#6870)) ([6e9a532](feast-dev@6e9a532))
* Add quality monitoring features for Trino offline store ([feast-dev#6779](feast-dev#6779)) ([9340545](feast-dev@9340545))
* Add SavedDatasetLanceStorage ([1118d3e](feast-dev@1118d3e))
* Add standalone MCP server as a first-class component ([0efab5c](feast-dev@0efab5c)), closes [python-keycloak#623](https://github.com/python-keycloak/issues/623)
* Add structured audit logging for MCP feature server ([feast-dev#6456](feast-dev#6456)) ([640ac70](feast-dev@640ac70))
* Add Trino compute engine for batch retrieval and materialization ([feast-dev#6898](feast-dev#6898)) ([11a47b4](feast-dev@11a47b4))
* Batch Postgres online reads across feature views ([feast-dev#6832](feast-dev#6832)) ([514bee7](feast-dev@514bee7)), closes [feast-dev#3259](feast-dev#3259)
* **bigtable:** Make write batch size and concurrency configurable ([feast-dev#6847](feast-dev#6847)) ([5388522](feast-dev@5388522))
* Bucket feature count labels in latency metrics ([feast-dev#6811](feast-dev#6811)) ([d9ea120](feast-dev@d9ea120))
* Expose runtime version in Feast UI ([feast-dev#6843](feast-dev#6843)) ([fa8f06b](feast-dev@fa8f06b))
* Make Milvus index and search params configurable ([ef743ff](feast-dev@ef743ff))
* Offline write batch for IcebergSource ([5be5ed0](feast-dev@5be5ed0))
* OpenLineage consumer improvements - dataset versioning, column lineage, ownership ([69f294e](feast-dev@69f294e))
* **operator:** Add tolerations and nodeSelector to the FeatureStore CR ([feast-dev#6741](feast-dev#6741)) ([03dac6f](feast-dev@03dac6f))
* Serve the MCP server dual-stack on --host :: ([4fc9726](feast-dev@4fc9726))
* Support Milvus partition keys in the Milvus online store ([0ed3285](feast-dev@0ed3285))
* Support token, uri and db_name in the Milvus online store ([c5efecd](feast-dev@c5efecd))
* Version-pinning for FeatureService (online + offline) ([feast-dev#6718](feast-dev#6718)) ([787845a](feast-dev@787845a))

### Performance Improvements

* Avoid pandas copy in Spark reads ([feast-dev#6878](feast-dev#6878)) ([4771156](feast-dev@4771156))
* Decouple metrics HTTP server into a dedicated child process ([feast-dev#6855](feast-dev#6855)) ([0b621de](feast-dev@0b621de))
* Reduce online serving hot-path overhead from metrics and audit logging ([5ee7ee3](feast-dev@5ee7ee3))

---------

Signed-off-by: Srihari <svenkata@redhat.com>
Signed-off-by: ntkathole <nikhilkathole2683@gmail.com>
Co-authored-by: Srihari <svenkata@redhat.com>
Co-authored-by: Cursor <cursoragent@cursor.com>
Co-authored-by: feast-ci-bot <feast-ci-bot@willem.co>
@rhods-devops-app rhods-devops-app Bot mentioned this pull request Oct 14, 2026
Merged
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@YHC66 @codecov-commenter @haoxu0