SOLVED!: Urbackup crashes with segfault in liburbackupser

general discussion
1

Hi all,

since Sunday this week I’m testing if urbackup would be the perfect backup solution for our non profit club.
I’m running urbackup on a Debian 7.2 Wheezy Server with Gnome desktop and i have 8 Windows7 client’s to be backuped.

Urbackup did run from Sunday to Wednesday on the server without problems, :D but since today it crashes always in a library. :cry:

I have collected 3 logs since urbackup crashed:

/var/log/urbackup.log
2013-10-31 13:13:55: ERROR: Database “urbackup/backup_server.db” couldn’t be opened

/var/log/syslog
Oct 31 13:13:55 debian-server kernel: [ 288.340649] urbackup_srv[5161]: segfault at 0 ip 00007f756e077636 sp 00007fff8ce0b860 error 4 in liburbackupserver.so.0.0.0[7f756e03c000+157000]

I have already checked the integrety of the database as found in the documentation,
i have already defragmented the database and made an export/import of the database.

No changes after restarting Urbackup.

Oct 31 13:35:26 debian-server kernel: [ 1579.167631] urbackup_srv[5724]: segfault at 0 ip 00007f273cc73636 sp 00007fffe98488f0 error 4 in liburbackupserver.so.0.0.0[7f273cc38000+157000]

How could I help the developper to solve this problem?

Best Regards,
Stefan

2

Hi all,
I have a new log with log level set to debug and i get the following in urbackup.log:

2013-10-31 14:19:52: Changing user…
2013-10-31 14:19:52: done.
2013-10-31 14:19:52: Loaded -pychart- plugin
2013-10-31 14:19:52: Loaded -url- plugin
2013-10-31 14:19:52: Loaded -cryptoplugin- plugin
2013-10-31 14:19:52: Loaded -download- plugin
2013-10-31 14:19:52: Loaded -fsimageplugin- plugin
2013-10-31 14:19:52: Starting HTTP-Server on port 55414
2013-10-31 14:19:52: HTTP: Server started up sucessfully!
2013-10-31 14:19:52: Generating Server identity…
2013-10-31 14:19:52: Generating Server token…
2013-10-31 14:19:52: Destroying all databases…
2013-10-31 14:19:52: Destroying all databases…
2013-10-31 14:19:52: Could not open db [urbackup/backup_server.db]
2013-10-31 14:19:52: ERROR: Database “urbackup/backup_server.db” couldn’t be opened

…
/var/log/sylog:
Oct 31 14:19:52 debian-server kernel: [ 4245.109874] urbackup_srv[7364]: segfault at 0 ip 00007f15983be636 sp 00007fff423e2520 error 4 in liburbackupserver.so.0.0.0[7f1598383000+157000]

But the datebase backup_server.db exists and is readable and the integrity of the database is o.k.

Regards,
Stefan

3

Yes, it unfortunately crashes, if it cannot open the database.

Only one idea: Have you checked if the “urbackup” user has the permission to open/write to backup_server.db (and the -wal and -shm files)?

4

Yup, thanks for the help:

permission was the problem. I don’t really know what happend on my server and why this happened, but the urbackup_srv didn’t have
permission to open the database. So this is solved. :D :D :D

Regards,
Stefan