Rsnapshot and bug with cp ?

Frédéric BERNOUD · Guest

It seems there is a BUG with cp !

I regularly encounter a problem with the order "cp - al " on several of backup under CENTOS. I m using rsnapshot for the backup.

My safeguard or backup works with Rsnapshot application , which using "cp. -al" command

This is reproductible *each time*. Note the bizarre error message
above (hardlinking over itself : ./daily.HARD_COPY" --> "./daily.HARD_COPY"... and not "./daily.0" ---> "./daily.HARD_COPY") :

.snapshots]# cp -al daily.0 daily.HARD_COPY
cp: cannot create hard link `daily.HARD_COPY/localhost/home/sauvegardes/sauvegarde_microlog/copacu/COUREVEN/00001284.doc' to `daily.HARD_COPY/localhost/home/sauvegardes/sauvegarde_microlog/copacu/COUREVEN/00001284.doc': No such file or directory
.snapshots]#

Yes, that file is missing on the copy.

.snapshots]# ls -l daily.HARD_COPY/localhost/home/sauvegardes/sauvegarde_microlog/copacu/COUREVEN/00001284.doc
ls: daily.HARD_COPY/localhost/home/sauvegardes/sauvegarde_microlog/copacu/COUREVEN/00001284.doc: No such file or directory
.snapshots]#

And the file is not corrupted

.snapshots]# mv daily.0/localhost/home/sauvegardes/sauvegarde_microlog/copacu/COUREVEN/00001284.doc ./
.snapshots]# cp -al 00001284.doc 00001284.doc-hard-link
.snapshots]# ls -l 00001284.doc-hard-link
-rwxr--r-- 27 nobody nobody 30720 Jun 28 2006 00001284.doc-hard-link
.snapshots]#

It is working if we remove the file:

.snapshots]# cp -al daily.0 daily.HARD_COPY2
.snapshots]# echo $?
0
.snapshots]#

This is reproductible:

.snapshots]# cp -al daily.0 daily.HARD_COPY3
cp: cannot create hard link `daily.HARD_COPY3/localhost/home/sauvegardes/sauvegarde_microlog/copacu/COUREVEN/00001284.doc' to `daily.HARD_COPY3/localhost/home/sauvegardes/sauvegarde_microlog/copacu/COUREVEN/00001284.doc': No such file or directory
.snapshots]# ls -l daily.HARD_COPY3/localhost/home/sauvegardes/sauvegarde_microlog/copacu/COUREVEN/00001284.doc
ls: daily.HARD_COPY3/localhost/home/sauvegardes/sauvegarde_microlog/copacu/COUREVEN/00001284.doc: No such file or directory
.snapshots]# ls -l daily.0/localhost/home/sauvegardes/sauvegarde_microlog/copacu/COUREVEN/00001284.doc
-rwxr--r-- 27 nobody nobody 30720 Jun 28 2006 daily.0/localhost/home/sauvegardes/sauvegarde_microlog/copacu/COUREVEN/00001284.doc
.snapshots]#

with coreutils 8.4 it is the same thing with another error message. But the file is coping:

.snapshots]# /usr/bin/cp-8.4 --version
cp (GNU coreutils) 8.4

.snapshots]# /usr/bin/cp-8.4 -al daily.0 daily.HARD_COPY4
/usr/bin/cp-8.4: cannot create link `daily.HARD_COPY4/localhost/home/sauvegardes/sauvegarde_microlog/copacu/COUREVEN/00001284.doc': File exists
.snapshots]# ls -l daily.HARD_COPY4/localhost/home/sauvegardes/sauvegarde_microlog/copacu/COUREVEN/00001284.doc
-rwxr--r-- 28 nobody nobody 30720 Jun 28 2006 daily.HARD_COPY4/localhost/home/sauvegardes/sauvegarde_microlog/copacu/COUREVEN/00001284.doc
.snapshots]#

Someone have the same bug on debian:

http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=512831

Please help!

.snapshots]# rpm -qa rsnapshot
rsnapshot-1.3.0-1.el5.rf
.snapshots]#

.snapshots]# cp --version
cp (GNU coreutils) 5.97

.snapshots]# cat /etc/redhat-release
CentOS release 5 (Final)
.snapshots]#

.snapshots]# rpm -qa coreutils
coreutils-5.97-23.el5_4.1
.snapshots]#

# uname -a
Linux sageetbellierbackup.altiva.org 2.6.18-8.1.14.el5 #1 SMP Thu Sep 27 18:58:54 EDT 2007 i686 i686 i386 GNU/Linux

.snapshots]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/md0 4.8G 308M 4.2G 7% /
tmpfs 247M 0 247M 0% /dev/shm
/dev/md5 434G 106G 306G 26% /home
/dev/md4 965M 18M 898M 2% /tmp
/dev/md2 4.8G 1.5G 3.1G 33% /usr
/dev/md3 5.7G 501M 4.9G 10% /var
.snapshots]#

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David Cantrell · Guest

Frédéric BERNOUD wrote:

Frédéric BERNOUD · Guest

Thanks David Cantrell.

I've try to comment out the cmd_cp line and I've got a similar error "ERROR: Warning! Could not link"

Note, this is on another server always on centos 5.

Any idea?

Regards,

Frederic Bernoud

LOGS:

[root < at > Serveur .snapshots]# rsnapshot -v daily
echo 25025 > /var/run/rsnapshot.pid
/bin/rm -rf /mnt/RAID1T/.snapshots/daily.14/
mv /mnt/RAID1T/.snapshots/daily.13/ /mnt/RAID1T/.snapshots/daily.14/
mv /mnt/RAID1T/.snapshots/daily.12/ /mnt/RAID1T/.snapshots/daily.13/
mv /mnt/RAID1T/.snapshots/daily.11/ /mnt/RAID1T/.snapshots/daily.12/
mv /mnt/RAID1T/.snapshots/daily.10/ /mnt/RAID1T/.snapshots/daily.11/
mv /mnt/RAID1T/.snapshots/daily.9/ /mnt/RAID1T/.snapshots/daily.10/
mv /mnt/RAID1T/.snapshots/daily.8/ /mnt/RAID1T/.snapshots/daily.9/
mv /mnt/RAID1T/.snapshots/daily.7/ /mnt/RAID1T/.snapshots/daily.8/
mv /mnt/RAID1T/.snapshots/daily.6/ /mnt/RAID1T/.snapshots/daily.7/
mv /mnt/RAID1T/.snapshots/daily.5/ /mnt/RAID1T/.snapshots/daily.6/
mv /mnt/RAID1T/.snapshots/daily.4/ /mnt/RAID1T/.snapshots/daily.5/
mv /mnt/RAID1T/.snapshots/daily.3/ /mnt/RAID1T/.snapshots/daily.4/
mv /mnt/RAID1T/.snapshots/daily.2/ /mnt/RAID1T/.snapshots/daily.3/
mv /mnt/RAID1T/.snapshots/daily.1/ /mnt/RAID1T/.snapshots/daily.2/
native_cp_al("/mnt/RAID1T/.snapshots/daily.0", \
"/mnt/RAID1T/.snapshots/daily.1")
----------------------------------------------------------------------------
rsnapshot encountered an error! The program was invoked with these options:
/usr/bin/rsnapshot -v daily
----------------------------------------------------------------------------
ERROR: Warning! Could not link("/mnt/RAID1T/.snapshots/daily.0/localhost/mnt/RAID1T/sauvegardes/Sauvegarde-Servlin/home/servlin1/microlog/copacu/COUREVEN/00011464.doc", "/mnt/RAID1T/.snapshots/daily.1/localhost/mnt/RAID1T/sauvegardes/Sauvegarde-Servlin/home/servlin1/microlog/copacu/COUREVEN/00011464.doc") : File exists
/usr/bin/rsync -a --delete --numeric-ids /mnt/RAID1T/.snapshots/daily.0/ \
/mnt/RAID1T/.snapshots/daily.1/
/usr/bin/rsync -a --delete --numeric-ids --relative --delete-excluded \
--exclude=??? /home/vpopmail /mnt/RAID1T/.snapshots/daily.0/localhost/
/usr/bin/rsync -a --delete --numeric-ids --relative --delete-excluded \
--exclude=??? /etc /mnt/RAID1T/.snapshots/daily.0/localhost/
touch /mnt/RAID1T/.snapshots/daily.0/
rm -f /var/run/rsnapshot.pid
------------------------------------------------------------------------------
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Stay online with enterprise data centers and the best network in the business
Choose flexible plans and management services without long-term contracts
Personal 24x7 support from experience hosting pros just a phone call away.
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