On 7/1/11 4:25 PM, Aleksey Tsalolikhin wrote:
> On Fri, Jul 1, 2011 at 11:56 AM, Aleksey Tsalolikhin
> <atsaloli.tech AT gmail DOT com>  wrote:
>> I just noticed one of my servers has not had a successful full backup
>> for over 60 days.  Incremental backups still succeed.
>>
>> Full backups fail after 2-4 hours with:
>>
>>   Got fatal error during xfer (Child exited prematurely)
>>
>> Right now I've got a full backup running (according to the Web UI)
>> but if I look on the server, I can see the ssh process that is the
>> child of the BackupPC dump process is defunct:
>>
>> ps shows:
>>
>> backuppc  PID  PPID  0  Jun30  ?  00:00:03 [ssh]<defunct>
>>
>> So I know this full backup will fail as well once BackupPC realizes
>> the child is dead.
>>
>> BackupPC version 3.1.0 on CentOS 5.5 (64-bit)
>>
>>
>> I'm going to update to CentOS 5.6 and restart the full backup,
>> and put an strace on the ssh process...  trying to figure out
>> why it goes defunct.
>
> I've updated to CentOS 5.6.
>
> I'm running an strace on both SSH's processes (on the BackupPC
> server and the BackupPC client).    I also added an strace on the
> rsync on the BackupPC client.
>
> Let me know if you have any other suggestions, please...

Is there a NAT router, stateful firewall, or similar device between them? 
Backups with few changes can let the connection time out leaving both ends 
waiting for the other.

-- 
   Les Mikesell
     lesmikesell AT gmail DOT com


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