Thanks for your quick response!
The ceph-common version is 18.2.0 (Ubuntu Jammy). I tried the same
within cephadm shell (19.2.3) and there I get a "operation not
permitted":
root@ceph-osd-1:/# ceph -v
ceph version 19.2.3 (c92aebb279828e9c3c1f5d24613efca272649e62) squid (stable)
root@ceph-osd-1:/# cephfs-journal-tool --rank=cephfs:0 event get list
Error ((1) Operation not permitted2026-06-19T09:26:02.373+0000
7f25d078b380 -1 main: Cannot run cephfs-journal-tool on an active file
system!
)
Why can I list events from outside the shell? I'm a bit surprised.
Zitat von Venky Shankar <[email protected]>:
Hi Eugen,
On Fri, Jun 19, 2026 at 2:27 PM Eugen Block via ceph-users
<[email protected]> wrote:
Hi,
I am currently looking into MDS warnings (behind on trimming) on a
customer cluster. They recently upgraded to Squid 19.2.3 which seems
to have fixed a bug with trimming, so the warning doesn't come that
often anymore (if at all currently). But when digging a bit deeper, I
noticed these messages in the event get list output:
cephfs-journal-tool --rank=cephfs:0 event get list | head
2026-06-18T13:12:22.821+0000 7fec1b5ff280 0 uh oh, unknown log event
type 100 length 14
2026-06-18T13:12:22.833+0000 7fec1b5ff280 0 uh oh, unknown log event
type 100 length 14
What version is cephfs-journal-tool (--version) and is it the same
version as (or close to) the ceph cluster?
That message is repeated 118 times or so before dumping the actual
event list. I looked at the code for 19.2.0 [0] and 19.2.3 [1], in
both cases event type 100 seems to be defined:
#define EVENT_SEGMENT 100
So why is it unknown? It doesn't appear to have any negative impact,
at least noone has complained yet, but I still wanted to ask what this
is about. Can I ignore this? Will that go away on its own at some point?
Any pointers are appreciated!
Thanks!
Eugen
[0] https://github.com/ceph/ceph/blob/v19.2.0/src/mds/LogEvent.h#L45
[1] https://github.com/ceph/ceph/blob/v19.2.3/src/mds/LogEvent.h#L45
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