Re: rocksdb corruption with 16.2.6

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 I also ran into this with v16. In my case, trying to run a repair totally
exhausted the RAM on the box, and was unable to complete.

After removing/recreating the OSD, I did notice that it has a drastically
 smaller OMAP size than the other OSDs. I don’t know if that actually means
anything, but just wanted to mention it in case it does.

ID   CLASS  WEIGHT     REWEIGHT  SIZE     RAW USE  DATA     OMAP     META
  AVAIL    %USE   VAR   PGS  STATUS  TYPE NAME
14   hdd    10.91409   1.00000   11 TiB  3.3 TiB  3.2 TiB  4.6 MiB  5.4 GiB
 7.7 TiB  29.81  1.02   34      up    osd.14
16   hdd    10.91409   1.00000   11 TiB  3.3 TiB  3.3 TiB   20 KiB  9.4 GiB
 7.6 TiB  30.03  1.03   35      up    osd.16

~ Sean


On Sep 20, 2021 at 8:27:39 AM, Paul Mezzanini <pfmeec@xxxxxxx> wrote:

> I got the exact same error on one of my OSDs when upgrading to 16.  I
> used it as an exercise on trying to fix a corrupt rocksdb. A spent a few
> days of poking with no success.  I got mostly tool crashes like you are
> seeing with no forward progress.
>
> I eventually just gave up, purged the OSD, did a smart long test on the
> drive to be sure and then threw it back in the mix.  Been HEALTH OK for
> a week now after it finished refilling the drive.
>
>
> On 9/19/21 10:47 AM, Andrej Filipcic wrote:
>
> 2021-09-19T15:47:13.610+0200 7f8bc1f0e700  2 rocksdb:
>
> [db_impl/db_impl_compaction_flush.cc:2344] Waiting after background
>
> compaction error: Corruption: block checksum mismatch: expected
>
> 2427092066, got 4051549320  in db/251935.sst offset 18414386 size
>
> 4032, Accumulated background error counts: 1
>
> 2021-09-19T15:47:13.636+0200 7f8bbacf1700 -1 rocksdb: submit_common
>
> error: Corruption: block checksum mismatch: expected 2427092066, got
>
> 4051549320  in db/251935.sst offset 18414386 size 4032 code = 2
>
> Rocksdb transaction:
>
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