From: Laura Flores Date: Thu, 18 Jul 2024 22:50:17 +0000 (-0500) Subject: doc/releases: add release note about thread creation incompatibility X-Git-Url: http://git.apps.os.sepia.ceph.com/?a=commitdiff_plain;h=3d94fa67106d5103a5819b835aed7a05f37de478;p=ceph.git doc/releases: add release note about thread creation incompatibility Signed-off-by: Laura Flores --- diff --git a/doc/releases/reef.rst b/doc/releases/reef.rst index 702b11b400b2d..a59862ca27b69 100644 --- a/doc/releases/reef.rst +++ b/doc/releases/reef.rst @@ -15,13 +15,19 @@ An early build of this release was accidentally exposed and packaged as 18.2.3 b That 18.2.3 release should not be used. The official release was re-tagged as v18.2.4 to avoid further confusion. +v18.2.4 container images, now based on CentOS 9, may be incompatible on older kernels (e.g., Ubuntu 18.04) due +to differences in thread creation methods. Users upgrading to v18.2.4 container images on older OS versions +may encounter crashes during pthread_create. For workarounds, refer to the related tracker. However, we recommend +upgrading your OS to avoid this unsupported combination. +Related tracker: https://tracker.ceph.com/issues/66989 + Notable Changes --------------- * RADOS: This release fixes a bug (https://tracker.ceph.com/issues/61948) where pre-reef clients were allowed to connect to the `pg-upmap-primary` (https://docs.ceph.com/en/reef/rados/operations/read-balancer/) interface despite users having set `require-min-compat-client=reef`, leading to an assert in the osds - and mons. You are susceptible to this bug in reef versions prior to 18.2.3 if 1) you are using an osdmap + and mons. You are susceptible to this bug in reef versions prior to 18.2.4 if 1) you are using an osdmap generated via the offline osdmaptool with the `--read` option or 2) you have explicitly generated pg-upmap-primary mappings with the CLI command. Please note that the fix is minimal and does not address corner cases such as adding a mapping in the middle of an upgrade or in a partially upgraded cluster (related trackers linked