Aw: Re: Re: rsync 3.0.9 segmentation fault

Fri, 27 Mar 2015 06:17:20 -0700

>build and about 1.5GB is used during the actual transfer. The client has 16GB of RAM with a peak usage of 8.5GB. 
 
1.5GB + 8.5GB of systems memory, including buffers etc?
give it a closer look to the rsync process with ps (as mentioned below)
 
also have a look at:
 
but what is mentioned there does not really fit to your problem with <8M files - as that theoretically should sum up to <1GB rsync memory requirement (if things mentioned in the faq are still valid)
 
are your rsync binares 32 or 64 bit ?
 
regards
roland
 
 
 
Gesendet: Freitag, 27. März 2015 um 12:19 Uhr
Von: "Aron Rotteveel" <rotteveel.a...@gmail.com>
An: devz...@web.de
Cc: rsync@lists.samba.org
Betreff: Re: Re: rsync 3.0.9 segmentation fault
Hi Roland,
 
Thanks for the reply. Memory usage on both machines seem fine. The server has 4GB's of RAM, of which about 3GB is used during the file list build and about 1.5GB is used during the actual transfer. The client has 16GB of RAM with a peak usage of 8.5GB. 
 
I just tried three transfers in a row and it consistently breaks at a certain point, after which I get the "ERROR: out of memory in flist_expand [sender]" error. There is not much special to mention regarding the file on which it breaks: it's a 22KB JPEG file with no special attributes.
 
The backup server is running Debian 7.8, the client runs on CentOS 5.11.
 
A `find . | wc -l` in the backup directory results in 7434013 files.
 
--
Best regards / Met vriendelijke groet,

Aron Rotteveel
 
2015-03-19 20:10 GMT+01:00 <devz...@web.de>:
Hi Aron,
 
i hope it`s ok for you if i bring this back on-list. Your issue and the way or possible fix to resolve it may be interesting for others too (that may include future searches etc)
 
so with 3.1.1 we are a step further....
 
i don`t really have a clue what`s happening here but my next step would be taking a closer look on how the memory usage of rsync on the client and server grows.
 
you could log it like this:
while true;do ps -eo vsz,rss,sz,rsync|grep cron;sleep 10;done >logfile
 
does it grow continuously? does the oom situation reproducibly happen at a certain size ?
what`s the client and server platform?
how many files? (-> https://rsync.samba.org/FAQ.html#5 ! )
 
regards
roland
 
Gesendet: Donnerstag, 19. März 2015 um 12:24 Uhr
Von: "Aron Rotteveel" <rotteveel.a...@gmail.com>
An: devz...@web.de
Betreff: Re: rsync 3.0.9 segmentation fault
In addition to my last message:
  • Client (sender) has 16GB's or RAM, of which only 6.5GB is used during peak.
  • I tried using --no-inc-recursive, but it does not solve the issue.
What currrently is puzzling me is the question of why I am receiving these errors when my server seems to have plenty of memory to spare.
 
--
Best regards / Met vriendelijke groet,

Aron Rotteveel
 
2015-03-19 11:52 GMT+01:00 Aron Rotteveel <rotteveel.a...@gmail.com>:
Hi Roland,
 
I just upgrade both the client and host to 3.1.1 and seem to memory related issues now:
 
ERROR: out of memory in make_file [sender]
rsync error: error allocating core memory buffers (code 22) at util2.c(102) [sender=3.1.1]
[sender] _exit_cleanup(code=22, file=util2.c, line=102): about to call exit(22)
[Receiver] _exit_cleanup(code=22, file=io.c, line=1633): about to call exit(22)
----------------------------------------------------------------------------
rsnapshot encountered an error! The program was invoked with these options:
/usr/bin/rsnapshot -c \
    /home/remotebackup/hosts/<redacted>/rsnapshot.conf sync
----------------------------------------------------------------------------
 
--
Best regards / Met vriendelijke groet,

Aron Rotteveel
 
2015-03-18 23:43 GMT+01:00 <devz...@web.de>:
Hi,
 
rsync 3.0.9 is quite ancient, more than 3 years old. A lot of bugs have been fixed since then.
 
Is there a chance to update to the latest rsync version and retry with that ?
 
regards
Roland
 
Gesendet: Dienstag, 17. März 2015 um 11:51 Uhr
Von: "Aron Rotteveel" <rotteveel.a...@gmail.com>
An: rsync@lists.samba.org
Betreff: rsync 3.0.9 segmentation fault
Hi,
 
I am experiencing segfaults when transferring files via rsync though sudo.
Setup:
 
- Backupserver initiates the rsync command with --delete -vvv --no-inc-recursive --numeric-ids --delete-excluded --relative --rsync-path=/home/backupuser/rsync-wrapper.sh
- rsync-wrapper.sh (on the client) contains /usr/bin/sudo /usr/bin/rsync "$@";
- user "backupuser" has sudo access to the rsync command
- Both host and client are running 3.0.9
 
The transfer starts and some files are actually transferred. Once a certain file is reached (plain PHP file, no special characters or any other peculiarities) it segfaults.
 
rsync host output:
 
[sender] make_file(<redacted>/libraries/phputf8/mbstring/strlen.php,*,2)
rsync: connection unexpectedly closed (51261222 bytes received so far) [Receiver]
rsync error: unexplained error (code 139) at io.c(605) [Receiver=3.0.9]
[Receiver] _exit_cleanup(code=12, file=io.c, line=605): about to call exit(139)
----------------------------------------------------------------------------
rsnapshot encountered an error! The program was invoked with these options:
/usr/bin/rsnapshot -c \
    /home/remotebackup/hosts/<redacted>/rsnapshot.conf sync
----------------------------------------------------------------------------
ERROR: /usr/bin/rsync returned 139 while processing backupuser@<redacted>:/backup/
 
Client output when using gdb to debug the coredump:
 
warning: no loadable sections found in added symbol-file system-supplied DSO at 0x7fff015fd000
Core was generated by `/usr/bin/rsync --server --sender -vvvlogDtprRe.Lsf --numeric-ids . /backup'.
Program terminated with signal 11, Segmentation fault.
#0  0x00000035cda7b441 in memcpy () from /lib64/libc.so.6
 
Any help would be greatly appreciated. Please let me know if additional info is required to properly debug this issue.
--
Best regards / Met vriendelijke groet,

Aron Rotteveel
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