[lvm-devel] transaction_manager::new_block() couldn't allocate new block

[Eric Wheeler]

On Sun, 20 Oct 2019, Eric Wheeler wrote:
> On Sat, 19 Oct 2019, Eric Wheeler wrote:
> 
> > Hello all, 
> > 
> > We are attempting to repair a thin meta volume and get the following 
> > error after it runs for a while:
> > 
> > ~]# thin_repair -V
> > 0.8.5
> > 
> > ~]# thin_repair -i /dev/mapper/data-data--pool_tmeta -o /dev/data/tmeta-dest 
> > truncating metadata device to 4161600 4k blocks
> > terminate called after throwing an instance of 'std::runtime_error'
> >   what():  transaction_manager::new_block() couldn't allocate new block
> > Aborted (core dumped)
> > 
> > How I can troubleshoot this further?
> > 
> > I'm happy to try patches against thin_repair if you would like.  I'm also 
> > trying thin_dump/thin_restore, so we will see how that goes
> 
> Same problem with thin_dump/restore:
> 
> ~]# thin_dump --repair /dev/mapper/data-data--pool_tmeta -o /mnt/tmp/tmeta.xml
> ~]# thin_restore -i /mnt/tmp/tmeta.xml -o /dev/data/tmeta-dest
> truncating metadata device to 4161600 4k blocks
> Restoring: [====>                                             ] | 11%
> transaction_manager::new_block() couldn't allocate new block
> 
> I added a print of dev_id in xml_format.cc:parse_device() so maybe I can 
> skip the "bad" device, but I'm not really sure what the problem is so that 
> might not help.
> 
> Suggestions and patches welcome.  I'll post the meta XML when its done 
> bzipping (109GB) if that is helpful.

bz# 1763895

Here is the meta XML: 
  https://www.duetsolution.com/static/tmeta.xml.bz2

If someone can reproduce this and propose a fix or patch I would greatly 
appreciate it!

--
Eric Wheeler


> 
> --
> Eric Wheeler
> 
> 
> 
> 
> > ---but I 
> > thought you might want to know in case there is a bug in thin_repair that 
> > could be fixed while I have the metadata in this state.
> > 
> > --
> > Eric Wheeler
> > 
> > --
> > lvm-devel mailing list
> > lvm-devel at redhat.com
> > https://www.redhat.com/mailman/listinfo/lvm-devel
> > 
> 
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