OSD Restart results in "unfound objects"

[Diego Castro <diego.castro@xxxxxxxxxxxxxx>]

Hello, i have a cluster running Jewel 10.2.0, 25 OSD's + 4 Mon.

Today my cluster suddenly went unhealth with lots of stuck pg's  due unfound objects, no disks failures nor node crashes, it just went bad.

I managed to put the cluster on health state again by marking lost objects to delete "ceph pg <id> mark_unfound_lost delete". 

Regarding the fact that i have no idea why the cluster gone bad, i realized restarting the osd' daemons to unlock stuck clients put the cluster on unhealth and pg gone stuck again due unfound objects.

Does anyone have this issue?

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Diego Castro / The CloudFather
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