Ceph

555ed048e73024687fc8b106a570db4f osd-20_osdmap.13258__0_4E62BB79__none
6037911f31dc3c18b05499d24dcdbe5c osd-23_osdmap.13258__0_4E62BB79__none

~/logs » for i in 20 23; do ../ceph/src/osdmaptool --export-crush
/tmp/crush$i osd-$i*; ../ceph/src/crushtool -d /tmp/crush$i >
/tmp/crush$i.d; done; diff /tmp/crush20.d /tmp/crush23.d
../ceph/src/osdmaptool: osdmap file 'osd-20_osdmap.13258__0_4E62BB79__none'
../ceph/src/osdmaptool: exported crush map to /tmp/crush20
../ceph/src/osdmaptool: osdmap file 'osd-23_osdmap.13258__0_4E62BB79__none'
../ceph/src/osdmaptool: exported crush map to /tmp/crush23
6d5
< tunable chooseleaf_vary_r 1

Looks like the chooseleaf_vary_r tunable somehow ended up divergent?

From ceph-users thread: [ceph-users] Some OSD and MDS crash

I suspect most of the peering state machine crashes after upgrade we have seen recently are due to this bug.