Hi John, thanks a lot - I was indeed able to identify the machine in question. As for the kernel, we'll certainly update to a newer kernel (3.16 and later 3.19) for the Ubuntu 14.04 clients. For the 12.04 clients, we'll have to see, but these machines will be phased out over time anyhow. I'd like to avoid the FUSE client, as the performance is so much worse than with the kernel client. Thanks again! Oliver On 30.07.2015 09:50, John Spray wrote:
For sufficiently recent clients we do this for you (clients send some metadata like hostname, which is used in the MDS to generate an easier-to-understand identifier). To do it by hand, use the admin socket command "ceph daemon mds.<id> session ls" command, and look out for the client IP addresses in the address part of each entry. By the way, there have been various other bugs in 3.13-ish kernels, so you should consider using either a more recent kernel or a fuse client. John On 30/07/15 08:32, Oliver Schulz wrote:Hello Ceph Experts, lately, "ceph status" on our cluster often states: mds0: Client CLIENT_ID failing to respond to capability release How can I identify which client is at fault (hostname or IP address) from the CLIENT_ID? What could be the source of the "failing to respond to capability release" - Linux kernel on the client too old? We use ceph-0.94.2 on the cluster, and the CephFS kernel client on the clients (kernel 3.13.0 on Ubuntu 12.04 and Ubuntu 14.04). But it's possible that there's a machine with an older Kernel around somewhere ... Cheers and thanks, Oliver _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
_______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
