2025 Changelog

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

Improvement

• Backported in #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 (Julia Kartseva).

Bug Fix (user-visible misbehavior in an official stable release)

• Backported in #85141: Refresh credentials in delta-kernel in storage DeltaLake. #84751 (Kseniia Sumarokova).
• Backported in #85156: Fixed double-free in AzureIteratorAsync. #85064 (Nikita Taranov).

NOT FOR CHANGELOG / INSIGNIFICANT

• Backported in #85104: Maybe this will fix the crashes like this:. #84887 (Mikhail Artemenko).