I am having again "1 clients failing to respond to capability release"
and "1 MDSs report slow requests"
It looks like if I stop nfs-ganesha these disappear and if I start
ganesha they reappear. However when you look at the sessions[0] they are
all quite low the sessions with 10120, 2012 and 1816 are direct cephfs
mounts.
The only thing I changed recently is that I increased the pg of some
pools. Updating nfs-ganesha from 2.6 to 2.7 does not resolve this issue.
I have been running this setup for many months without issues.
1. does this affect other clients?
2. why do I have this suddenly, did not even reboot the servers 127
days?
[0]
[@c01 ~]# ceph daemon mds.a session ls | egrep 'num_leases|num_caps'
"num_leases": 0,
"num_caps": 2,
"num_leases": 0,
"num_caps": 48,
"num_leases": 0,
"num_caps": 4,
"num_leases": 0,
"num_caps": 1,
"num_leases": 0,
"num_caps": 9,
"num_leases": 0,
"num_caps": 4,
"num_leases": 0,
"num_caps": 26,
"num_leases": 0,
"num_caps": 2,
"num_leases": 0,
"num_caps": 2012,
"num_leases": 0,
"num_caps": 10120,
"num_leases": 0,
"num_caps": 1816,
"num_leases": 0,
"num_caps": 8,
"num_leases": 0,
"num_caps": 7,
-----Original Message-----
Subject: Re: Luminous 12.2.12 "clients failing to respond
to capability release" & "MDSs report slow requests" error
Worked around it by doing a fail of the mds because I read somewhere
about restarting it. However would be nice to know what causes this and
how to prevent it.
ceph mds fail c
-----Original Message-----
Subject: Re: Luminous 12.2.12 "clients failing to respond
to capability release" & "MDSs report slow requests" error
These are not excessive values, are they? How to resolve this?
[@~]# ceph daemon mds.c cache status
{
"pool": {
"items": 266303962,
"bytes": 7599982391
}
}
[@~]# ceph daemon mds.c objecter_requests {
"ops": [],
"linger_ops": [],
"pool_ops": [],
"pool_stat_ops": [],
"statfs_ops": [],
"command_ops": []
}
-----Original Message-----
Subject: Re: Luminous 12.2.12 "clients failing to respond
to capability release"
On the client I have this
[@~]# cat /proc/sys/fs/file-nr
10368 0 381649
-----Original Message-----
Subject: Luminous 12.2.12 "clients failing to respond to
capability release"
I am getting this error
I have in two sessions[0] num_caps high ( I assume the error is about
num_caps ). I am using a default luminous and a default centos7 with
default kernel 3.10.
Do I really still need to change to a not stock kernel to resolve this?
I read this in posts of 2016 and 2019, yet I also saw some post on
tuning the mds.
[0]
ceph daemon mds.c session ls
{
"id": 3634861,
"num_leases": 0,
"num_caps": 2183,
"state": "open",
"request_load_avg": 181,
"uptime": 2545057.775869,
"replay_requests": 0,
"completed_requests": 0,
"reconnecting": false,
{
"id": 3644756,
"num_leases": 0,
"num_caps": 2080,
"state": "open",
"request_load_avg": 32,
"uptime": 2545057.775869,
"replay_requests": 0,
"completed_requests": 0,
"reconnecting": false,
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