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Ceph Tentacle (v20)

This document lists known critical bugs affecting Ceph Tentacle (v20) releases.

OSD Crash When Enabling EC Optimizations on CephFS​

Severity: High Affected Versions: 20.2.0 Bug Report: https://tracker.ceph.com/issues/71642

Description​

OSDs crash when allow_ec_optimizations is enabled on an existing CephFS Erasure Coded (EC) data pool that does not have allow_ec_overwrites explicitly enabled. The crash occurs in ECTransaction::WritePlanObj when accessing a non-existent transaction key.

Recommendation​

FastEC Scrub Errors After Recovery​

Severity: Medium Affected Versions: 20.2.0 Bug Report: https://tracker.ceph.com/issues/73184

Description​

After recovering from the EC optimization crash, clusters may experience excessive scrub errors with messages like candidate size X info size Y mismatch. This is a secondary issue related to the FastEC code path.

Recommendation​