You can try start on the volume. Since the volume is already started, this will do a force start to get back the offline bricks.
Also, can you check if it's an issue with monitoring from engine?
what does "gluster volume status" from one of the gluster server's CLI return?

If the brick is offline, even after the force start, you'll need to attach the glusterd logs and brick logs to troubleshoot

On Tue, Sep 24, 2019 at 1:15 PM Amit Bawer <abawer@redhat.com> wrote:
it is preferable to have all GFS nodes online and running first, you can follow troubleshooting here:
 
https://www.ovirt.org/documentation/gluster-hyperconverged/chap-Troubleshooting.html


On Tue, Sep 24, 2019 at 7:18 AM zhouhao@vip.friendtimes.net <zhouhao@vip.friendtimes.net> wrote:


 
Date: 2019-09-24 11:41
Subject: Re: [ovirt-users] One of the brick in the GFS is down ,How can I slove it?
Can I click The 'start' button??


 
Date: 2019-09-24 11:36
To: users
Subject: [ovirt-users] One of the brick in the GFS is down ,How can I slove it?
How can I slove it safely? There are 50 vms running in this GFS


the mail messages below:

Time: 2019-09-24 04:47:20.511
Message: Detected change in status of brick 192.168.3.16:/vmdata/gfs of volume bojoy-GFS of cluster bojoy-cluster from UP to DOWN via cli.
Severity: WARNING

status below:


GFS service status
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