6.3. Ceph

Metadata server run out of memory and reports over-sized cache

Previously, metadata server (MDS) would run out of memory as the standby-replay MDS daemons would not trim their caches.

With this fix, the MDS trims its cache when in standby-replay. As a result MDS would not run out of memory.

(BZ#2141422)

Ceph is inaccessible after crash or shutdown tests are run

Previously, in a stretch cluster, when a monitor is revived and is in the probing stage for other monitors to receive the latest information such as MonitorMap or OSDMap, it is unable to enter stretch_mode. This prevents it from correctly setting the elector’s disallowed_leaders list, which leads to the Monitors getting stuck in election and Ceph eventually becomes unresponsive.

With this fix, the marked-down monitors are unconditionally added to the disallowed_leaders list. This fixes the problem of newly revived monitors having different disallowed_leaders set and getting stuck in an election.

(BZ#2241937)