Server crashes on start since last reboot

Server
1

tl;dr: After a soft reboot of my Ubuntu server, UrBackup server fails to start.

I updated urbackup-server (package from urbackup ppa) recently to 2.1.18 and everything seemed fine. Then I rebooted the server for a kernel update and UrBackup server does not start anymore. It seems to have a problem with a non-existent backup, so I tried to run urbackupsrv remove-unknown but that crashed as well with this:

2017-02-21 10:17:55: Deleting incremental file backup ( id=75, backuptime=2016-11-22 12:42:50, path=161122-1341 ) from client "S****" ( id=2 ) ... ERROR: cannot access subvolume /srv/urbackup/S****/161122-1341: No such file or directory 2017-02-21 10:17:55: ERROR: No permission to access "/srv/urbackup/S****/161122-1341" 2017-02-21 10:17:55: WARNING: Warning: Directory doesn't exist: "/srv/urbackup/S****/161122-1341" *** Error in 'urbackupsrv': corrupted double-linked list: 0x00000000016f5b10 ***

Running urbackup run to see learn more lead to this error:

2017-02-21 10:05:23: WARNING: File backup [id=412, path=170221-0543, backuptime=2017-02-21 04:44:23, clientid=1, client=e****] is incomplete. Deleting it. 2017-02-21 10:05:23: WARNING: Deleting file backup [id=412, path=170221-0543, backuptime=2017-02-21 04:44:23, clientid=1, client=e****]... ERROR: cannot access subvolume /srv/urbackup/e****/170221-0543: No such file or directory 2017-02-21 10:05:23: ERROR: No permission to access "/srv/urbackup/e****/170221-0543" 2017-02-21 10:05:23: WARNING: Warning: Directory doesn't exist: "/srv/urbackup/e****/170221-0543" *** Error in 'urbackupsrv': double free or corruption (!prev): 0x00000000026b2fc0 ***

A complete output of urbackupsrv run can be found in output.log.zip (3,7 KB)

I hope you can help me get the server back up again.

2

Sorry for the problems! The Ubuntu packages unfortunately do not have debug info. Could you compile it and run it in gdb? https://urbackup.atlassian.net/wiki/display/US/Debugging+with+gdb+on+Linux

3

Running it in debugger seems easy enough, but the guide for compiling seems a bit brief (at least to me).
There’s no mention of what I need to do it. Obvoiusly make but what compiler? Or does build-essentials on Ubuntu cover what’s needed?
Isn’t there some other way to get the binary for debugging?
Sorry, I really don’t know how to do this, I’m just and admin.

4

@uroni:
I managed to compile urbackup server with the same paths as the packaged version so I could run it in debugger it in the same environmnet that experiences the problem. I hope the attached logs can help with solving this problem.
logs.zip (9,9 KB)

5

Could you try if 2.1.19 fixes this? Thanks!

6

Upgrade to 2.1.19 fixed it. Thank you Uroni!