Re: [rdiff-backup-users] Connection Read Error

[Andrew Ferguson]

Bob,

Run your command with higher verbosity. There's an error, but it's not  
clear why it's happening.

Also, the regression will not start if the previous backup did  
succeed, so one earlier must have failed. Since you are using --print- 
statistics, you can use the fact that if the statistics were printed,  
then the backup was successful, and if they were not, then the backup  
failed.


Andrew


On Apr 2, 2009, at 4:31 PM, Bob Mead wrote:

> Hello list:
>
> I'm almost afraid to post this, but here goes. I have another backup  
> which is now failing. This one last worked on 3/30 and has since  
> given only "Previous backup seems to have failed, regressing  
> destination now messages". If I understand the expected behavior of  
> rdiff correctly, I should only see this if the previous attempt to  
> backup has failed. Why do I get these messages immediately after a  
> successful backup, i.e. the next attempt to backup fails? And,  
> lastly: is there a mechanism in rdiff to tell me that the regression  
> has completed successfully? I've never seen any messages regarding  
> the completion of the regression. I'm going to guess that repeated  
> attempts to backup have failed and that is the reason why I am still  
> seeing 'regressing now' messages.
>
> The scenario: 'push' style backup, origin server is Linux 2.6.7- 
> gentoo-r5 #5 SMP Mon Feb 6 16:54:19 PST 2006 i686 Intel(R) Xeon(TM)  
> CPU 2.40GHz GenuineIntel GNU/Linux running rdiff v1.0.4, destination  
> server is Linux 2.6.15-51-amd64-server #1 SMP Tue Feb 12 17:08:38  
> UTC 2008 x86_64 GNU/Linux running rdiff v1.0.4.
>
> Destination directory is NFS mounted to the destination server  
> (original server ran out of space). I've set both rsize and wsize to  
> 16384 and timeo to 50 for the nfs mount to improve performance and  
> these settings have not changed since the backup last worked. Other  
> backups I run daily using this exact scenario (same destination  
> server [also using the nfs mount], different origin servers using  
> the same version of rdiff) are working just fine.
>
> Rdiff runs as a cron job daily using the following script/commands:
> rdiff-backup --print-statistics --exclude-special-files --exclude  
> '**tmp' --exclude /var/log --include /etc --include /home --include / 
> var --include /root --exclude / / root@<server name>::/home/space/ 
> backups/oak
> rdiff-backup --remove-older-than 2M root@<server name>::/home/space/ 
> backups/oak
>
> output:
> Previous backup seems to have failed, regressing destination now.
> Traceback (most recent call last):
> File "/usr/bin/rdiff-backup", line 23, in ?
>   rdiff_backup.Main.Main(sys.argv[1:])
> File "/usr/lib/python2.4/site-packages/rdiff_backup/Main.py", line  
> 285, in Main
>   take_action(rps)
> File "/usr/lib/python2.4/site-packages/rdiff_backup/Main.py", line  
> 255, in take_action
>   elif action == "backup": Backup(rps[0], rps[1])
> File "/usr/lib/python2.4/site-packages/rdiff_backup/Main.py", line  
> 299, in Backup
>   backup_final_init(rpout)
> File "/usr/lib/python2.4/site-packages/rdiff_backup/Main.py", line  
> 396, in backup_final_init
>   checkdest_if_necessary(rpout)
> File "/usr/lib/python2.4/site-packages/rdiff_backup/Main.py", line  
> 903, in checkdest_if_necessary
>   dest_rp.conn.regress.Regress(dest_rp)
> File "/usr/lib/python2.4/site-packages/rdiff_backup/connection.py",  
> line 445, in __call__
>   return apply(self.connection.reval, (self.name,) + args)
> File "/usr/lib/python2.4/site-packages/rdiff_backup/connection.py",  
> line 367, in reval
>   if isinstance(result, Exception): raise result
> OSError: [Errno 17] File exists: '/home/space/backups/oak/home/ 
> kstewa11'
> Traceback (most recent call last):
> File "/usr/bin/rdiff-backup", line 23, in ?
>   rdiff_backup.Main.Main(sys.argv[1:])
> File "/usr/lib/python2.4/site-packages/rdiff_backup/Main.py", line  
> 285, in Main
>   take_action(rps)
> File "/usr/lib/python2.4/site-packages/rdiff_backup/Main.py", line  
> 253, in take_action
>   connection.PipeConnection(sys.stdin, sys.stdout).Server()
> File "/usr/lib/python2.4/site-packages/rdiff_backup/connection.py",  
> line 352, in Server
>   self.get_response(-1)
> File "/usr/lib/python2.4/site-packages/rdiff_backup/connection.py",  
> line 314, in get_response
>   try: req_num, object = self._get()
> File "/usr/lib/python2.4/site-packages/rdiff_backup/connection.py",  
> line 230, in _get
>   raise ConnectionReadError("Truncated header string (problem "
> rdiff_backup.connection.ConnectionReadError: Truncated header string  
> (problem probably originated remotely)
>
> Thanks,
>   ~bob
>
>
>
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