NewDreamNetwork/ceph — comment on commit 47013c289e6ad6638b0f77152dafbc9f4723c032
File:  line 0
By liewegas:

The osdmap fsid is either zeros (still on osdmap epoch 0) or it matches the monmap (we don't accept osdmaps from other clusters). This patch was to fix a race where an MPGStats was sent with a zeroed fsid because we were on osdmap epoch 0 on the osd. It seems appropriate to switch all get_fsid() callers to the monmap at the same time, tho strictly not required.

Maybe the MPGStats wasn't needed at all (i didn't consider the osd keepalive aspect) but it's at worst harmless, and now doesn't generate an error on the monitor.