Hi all, I just upgraded the first node of our cluster to Ubuntu 24.04 (Noble) from 23.10 (Mantic). Unfortunately Ceph doesnt work anymore on the new node: === ceph version 19.2.0~git20240301.4c76c50 (4c76c50a73f63ba48ccdf0adccce03b00d1d80c7) squid (dev) 1: /lib/x86_64-linux-gnu/libc.so.6(+0x45320) [0x7c7da3c45320] 2: pthread_kill() 3: gsignal() 4: abort() 5: /lib/x86_64-linux-gnu/libstdc++.so.6(+0xa5ffe) [0x7c7da40a5ffe] 6: /lib/x86_64-linux-gnu/libstdc++.so.6(+0xbae9c) [0x7c7da40bae9c] 7: (std::unexpected()+0) [0x7c7da40a5a49] 8: /lib/x86_64-linux-gnu/libstdc++.so.6(+0xbb128) [0x7c7da40bb128] 9: (ceph::buffer::v15_2_0::list::iterator_impl<true>::copy(unsigned int, char*)+0xc4) [0x7c7da4a6e414] 10: (MDSMap::decode(ceph::buffer::v15_2_0::list::iterator_impl<true>&)+0xc74) [0x7c7da4c98fc4] 11: (MDSDaemon::handle_mds_map(boost::intrusive_ptr<MMDSMap const> const&)+0x2c6) [0x59124a7cd766] 12: (MDSDaemon::handle_core_message(boost::intrusive_ptr<Message const> const&)+0x2c9) [0x59124a7d0d79] 13: (MDSDaemon::ms_dispatch2(boost::intrusive_ptr<Message> const&)+0xe1) [0x59124a7d1341] 14: (Messenger::ms_deliver_dispatch(boost::intrusive_ptr<Message> const&)+0x3b8) [0x7c7da4930dd8] 15: (DispatchQueue::entry()+0x771) [0x7c7da492ecb1] 16: (DispatchQueue::DispatchThread::entry()+0x11) [0x7c7da49f3f81] 17: /lib/x86_64-linux-gnu/libc.so.6(+0x9ca94) [0x7c7da3c9ca94] 18: /lib/x86_64-linux-gnu/libc.so.6(+0x129c3c) [0x7c7da3d29c3c] NOTE: a copy of the executable, or `objdump -rdS <executable>` is needed to interpret this. === What's more APT says I now got a Ceph Version (19.2.0~git20240301.4c76c50-0ubuntu6) which doesn't even have any official release notes: https://docs.ceph.com/en/latest/releases/ How did I get here? What can I do to get back a working Ceph version? Until this is resolved, I obviously don't want to upgrade the other nodes. Thank you / BR Ranjan