Re: [Monotone-devel] Invariant violation in server

[Jon Bright]

Peter Simons wrote:

> The server frequently crashes with the following error:
>
>   processing 16350 byte input buffer from peer 213.146.112.87:49586
>   netio.hh:31: invariant 'I(pos < str.size())' violated
>   db.execute("ROLLBACK")
>
> The complete output with --verbose can be found here:
>
>   http://peti.cryp.to/log-server
>
> Any idea what triggers this? 

If it's the same as my recent problem with the same assertion, it's the 
client sending a 0-size delta to the server.  Try this on the client side:

monotone --db=blah.db debug 'select * from file_deltas where base=id;'

If this turns up rows, that's probably the problem.  Furthermore, if the 
source for the repository that's getting pushed to the server was an 
import from a CVS repository, it's probably *exactly* the same problem. 
 CVS sometimes puts 0-size deltas - i.e. deltas that don't change 
anything - in its RCS files (possibly it does this when the keyword 
substitution options are changed? - this is just a suspicion).  Monotone 
faithfully imports these, where it in fact shouldn't, since the concept 
of a 0-size delta is a) silly and b) not handled by the Monotone code.

For me, running the following command sorted the problem out:

monotone --db=blah.db debug 'delete from file_deltas where base=id;'

--
Jon Bright
Silicon Circus Ltd.
http://www.siliconcircus.com