Problems enabling automatic balancer

[Massimo Sgaravatto <massimo.sgaravatto@xxxxxxxxx>]

I am trying to enable the automatic balancer in my Luminous ceph cluster, following the documentation at:

http://docs.ceph.com/docs/luminous/mgr/balancer/

[root@ceph-mon-01 ~]# ceph balancer status

{

    "active": true, 

    "plans": [], 

    "mode": "crush-compat"

}

After having issued the command:

[root@ceph-mon-01 ~]# ceph balancer on

in the manager log file I see:

2019-01-11 15:50:43.087370 7f1afd496700  0 mgr[balancer] Error creating compat weight-set

Any hints how to  debug this ?

Thanks, Massimo

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