Re: [BackupPC-devel] BackupPC_Dump not reaping child processes when they finish.

[Franky V. L. <lie...@te...>]

Hi,

I mentioned the same issue about 3 days ago ... the sf.net mailarchive is a
bit behind though

Franky

On 10/25/07, John Rouillard <rou...@re...> wrote:
>
> Hi all:
>
> I just installed BackupPC last night and I think I have an issue with
> defunct processes caused by lack of a sigchld handler.
>
> In my process table I see:
>
>   backup    7186 28665 44 13:35 ?        00:05:30 /usr/bin/perl
>      /tools/BackupPC-3.1.0beta0/bin/BackupPC_dump -f hostname
>
>   backup    7279  7186  0 13:35 ?        00:00:00 [ssh] <defunct>
>   backup    7344  7186  0 13:35 ?        00:00:03 [BackupPC_dump]
> <defunct>
>
>   backup    7822  7186  0 13:36 ?        00:00:00 [ssh] <defunct>
>   backup    7831  7186  0 13:36 ?        00:00:00 [BackupPC_dump]
> <defunct>
>
>   backup    7837  7186  0 13:36 ?        00:00:00 /usr/bin/ssh -q -x -l
>     root hostname /usr/bin/rsync --server --sender
>     --numeric-ids --perms --owner --group -D --links --hard-links --times
>     --block-size=2048 --recursive --one-file-system --checksum-seed=32761
>     --ignore-times . /var/log/
>   backup    7848  7186  0 13:36 ?        00:00:00 /usr/bin/perl
>     /tools/BackupPC-3.1.0beta0/bin/BackupPC_dump -f hostname
>
> It looks to me like the parent BackupPC_Dump (pid 7186) isn't wait(2)ing
> for the child processes when it received a SIG_CHLD. I don't see a
> child signal handler in the /tools/BackupPC-3.1.0beta0/bin/BackupPC_dump
> file either.
>
> The config that produces this is:
>
>   $Conf{XferMethod} = 'rsync';
>
>   $Conf{RsyncShareName} = [
>     '/etc',
>     '/var/bak',
>     '/var/log',
>     '/usr/local',
>   ];
>
> So it would appear the defunct backupPC_Dump and ssh pairs are from
> the /etc and /var/bak backups and /var/log is running currently.
>
> Can anybody confirm my diagnosis and add a SIGCHLD handler, or tell
> why there shouldn't be one? Ultimately we will have some systems with
> 10 shares, and be running multiple hosts in parallel and this will
> defintely trip the zombie process monitoring that we do as well as
> looking bad and taking up space.
>
> I didn't see any mention of this fix in the 3.1.0beta1 release notes,
> so I assume the problem still exists. If people agree it's a bug, I'll
> file it on sourceforge.
>
> Some specs:
>
> OS: centos 4.2
> kernel: 2.6.9-42.0.10.ELsmp i686
> BackupPC ver: 3.1.0beta0
>
> --
>                                 -- rouilj
>
> John Rouillard
> System Administrator
> Renesys Corporation
> 603-643-9300 x 111
>
> -------------------------------------------------------------------------
> This SF.net email is sponsored by: Splunk Inc.
> Still grepping through log files to find problems?  Stop.
> Now Search log events and configuration files using AJAX and a browser.
> Download your FREE copy of Splunk now >> http://get.splunk.com/
> _______________________________________________
> BackupPC-devel mailing list
> Bac...@li...
> List:    https://lists.sourceforge.net/lists/listinfo/backuppc-devel
> Wiki:    http://backuppc.wiki.sourceforge.net
> Project: http://backuppc.sourceforge.net/
>
>