This release restores correct retention for metrics and diagnostics in mixed-age partitions and brings back actionable TLS hints when ClickHouse connections fail due to a TLS/plaintext mismatch.
🐞 Bug Fixes
Section titled “🐞 Bug Fixes”ClickHouse TLS mismatch diagnostics
Section titled “ClickHouse TLS mismatch diagnostics”Apr 29, 2026 · @mavam, @codex · #6098
ClickHouse connection errors caused by TLS/plaintext mismatches now include the TLS notes and hint again. This helps identify when to_clickhouse is using TLS against a plaintext ClickHouse endpoint and suggests setting tls=false when appropriate.
Retention for mixed-age metrics partitions
Section titled “Retention for mixed-age metrics partitions”Apr 28, 2026 · @tobim, @codex · #6086
Default retention policies now continue deleting metrics and diagnostics as their timestamps age into the retention window, even when older and newer events share a partition.
Previously, a partition that still contained newer events after retention could be skipped by later retention runs, leaving those events behind after they expired.