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Ceph Pacific (v16)

This document lists known critical bugs affecting Ceph Pacific (v16) releases.

PG Splitting/Merging Causes OSD Out-Of-Memory​

Severity: High
Affected Versions: 16.2.[0-10] Bug Report: https://tracker.ceph.com/issues/53729

Description​

A bug in the PG splitting and merging code can cause the OSD to go out-of-memory, a condition which persists even after restart. Offline tools are available in fixed releases to workaround the issue.

Recommendation​

  • Do not change pg_num for any pool until after upgrade to a fixed release
  • Disable the pg autoscaler
  • Fixed in v16.2.11 and v17.2.4+

Pacific Broken Hotfixes​

Severity: High
Affected Versions: 16.2.11, 16.2.12

Description​

Version 16.2.11 has a bug in ceph-volume osd activation, which was meant to be hotfixed in 16.2.12 but that release was built incorrectly, including changes which did not pass the rigorous QA testing.

Recommendation​

It is recommended to upgrade to version 16.2.13 or later.