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sidebar_position: 1
sidebar_label: 2025
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# 2025 Changelog

### ClickHouse release v25.6.8.10-stable (c54ce812cd4) FIXME as compared to v25.6.7.23-stable (4efdb9097eb)

#### Improvement
* Backported in [#85165](https://github.com/ClickHouse/ClickHouse/issues/85165): Introduce a new `backup_slow_all_threads_after_retryable_s3_error` setting to reduce pressure on S3 during retry storms caused by errors such as `SlowDown`, by slowing down all threads once a single retryable error is observed. [#84854](https://github.com/ClickHouse/ClickHouse/pull/84854) ([Julia Kartseva](https://github.com/jkartseva)).

#### Bug Fix (user-visible misbehavior in an official stable release)
* Backported in [#85141](https://github.com/ClickHouse/ClickHouse/issues/85141): Refresh credentials in delta-kernel in storage DeltaLake. [#84751](https://github.com/ClickHouse/ClickHouse/pull/84751) ([Kseniia Sumarokova](https://github.com/kssenii)).
* Backported in [#85156](https://github.com/ClickHouse/ClickHouse/issues/85156): Fixed double-free in `AzureIteratorAsync`. [#85064](https://github.com/ClickHouse/ClickHouse/pull/85064) ([Nikita Taranov](https://github.com/nickitat)).

#### NOT FOR CHANGELOG / INSIGNIFICANT

* Backported in [#85104](https://github.com/ClickHouse/ClickHouse/issues/85104): Maybe this will fix the crashes like this:. [#84887](https://github.com/ClickHouse/ClickHouse/pull/84887) ([Mikhail Artemenko](https://github.com/Michicosun)).

