Re: [rdiff-backup-users] "Found too many current_mirror incs!"

[Ron Leach]

On 02/05/2017 18:06, Yves Bellefeuille wrote:
> >   But I must have done something wrong in the new set up.  The first
> >   attempt to check that mail backup would continue working failed with
> >
> >   Exception 'Found too many current_mirror incs!' raised of class
> > '<type 'exceptions.AssertionError'>':
>
> Does this thread help?
>
> https://lists.nongnu.org/archive/html/rdiff-backup-users/2003-11/msg00035.html
Yves, thank you, yes, very helpful.  I hadn't thought to search for 
the error.

In that thread, Ben Escoto had said:

> > The current_mirror.* files are just 0 length regular files that
> > rdiff-backup touches so later version know when the last backup was.
> > I call them "increment files" because their filenames have that form,
> > and that is how the computer thinks of them.
> >
> > So you can have as many old increments.<time>.dir files as you want,
> > but there should only be 1 "current_mirror.<time>.data|snapshot" file,
> > because the current mirror should only have one time.

I have 3 'current_mirror.*' files which indicates a fault (Ben earlier 
mentioned that 1 file is normal, 2 files mean the last backup went 
wrong, and 3 files is just bad).

But renaming one or another - so that it wasn't a current_mirror.* 
file - resulted in this error:

Server5:/home/ron# rdiff-backup --check-destination-dir 
--print-statistics -v3 address@hidden::/srv/Data/101vmail
Fatal Error: Destination dir /srv/Data/101vmail does not need checking
Server5:/home/ron# Fatal Error: Lost connection to the remote system

I had to ^C to get a prompt back.

I was very surprised, because I thought that --check-dest... would 
regress if the check failed, and *not* error if the check passed.  To 
crash is worrying.

I searched for this new error and, in this archive,

http://www.backupcentral.com/forum/17/213517

Dominic announces what I imagine is an early version of his regress 
script which overcomes this second error.

But I am unsure whether to run it here because - really - I don't know 
which of these current_mirror.* files I can, safely, remove.  (And I 
need to remove one to get to the 'doesn't need checking' state.) 
Because the backups are incremental, I don't want to cause an 
intermediate diff item to be deleted as a result of my deleting a 
current_mirror.* file.  (This is the same dilemma that the OP in the 
thread you posted also faced - but the thread doesn't say what he 
finally decided.)

regards, and thanks - again - for posting that link,

Ron