Re: Cluster blacklists MDS, can't start

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On Wed, Mar 11, 2020 at 10:41 PM Robert LeBlanc <robert@xxxxxxxxxxxxx> wrote:
>
> This is the second time this happened in a couple of weeks. The MDS locks
> up and the stand-by can't take over so the Montiors black list them. I try
> to unblack list them, but they still say this in the logs
>
> mds.0.1184394 waiting for osdmap 234947 (which blacklists prior instance)

Do not *ever* unblacklist an MDS. Restart the daemon.

> Looking at a pg dump, it looks like the epoch is passed that.
>
> $ ceph pg map 3.756
> osdmap e234953 pg 3.756 (3.756) -> up [113,180,115] acting [113,180,115]
>
> Last time, it seemed to just recover after about an hour all by it's self.
> Any way to speed this up?

We need more cluster information, error messages, client
versions/types, etc. to help.

-- 
Patrick Donnelly, Ph.D.
He / Him / His
Senior Software Engineer
Red Hat Sunnyvale, CA
GPG: 19F28A586F808C2402351B93C3301A3E258DD79D
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