Some restore operations fail after running gc

[Yusuf Tran]

Hi,

I'm using the latest version of zbackup on a central backup server (1.4.4) and recently ran gc on my repo's with default 'fast' setting.

Now when I try to restore I'm getting errors reporting certain bundle files are missing, just wondering if anyone else has had this problem?

If it helps, the backup server is CentOS 7.

Yusuf

[Yusuf Tran]

if it helps, I've been using zbackup since the 1.4.1 so some old backups were done with that version!

[Vladimir Stackov]

Greetings,

can you rebuild zbackup with debug enabled (cmake -DCMAKE_BUILD_TYPE=Debug) and post complete output of failing restore?

Have you interrupted garbage collection process?

2015-11-07 0:20 GMT+03:00 Yusuf Tran <linh...@gmail.com>:

if it helps, I've been using zbackup since the 1.4.1 so some old backups were done with that version!

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Kind regards,
Vladimir.

[Yusuf Tran]

Hi Vlad,

I think the GC failed on one of the repo's if I recall correctly, error couldn't open file, apologies, this may be why restore is failing.

Does this mean the repo is unrecoverable now?

Would you still like me to build a debug version and run a restore?

[Vladimir Stackov]

>I think the GC failed on one of the repo's if I recall correctly, error couldn't open file, apologies, this may be why restore is failing.

I don't get it.

What error have you seen when was failed?

[Vladimir Stackov]

*When GC was failed

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Kind regards,
Vladimir.

[yusuf...@cognolink.com]

Apologies Vlad, I've lost track of the error, I know, not much help, in the mean time I've made a new repository and going to test gc again to try and catch the error.

[yusuf...@cognolink.com]

ok, testing again on another old repo (without running gc yet), errors when restoring:

error: size of the encrypted file is incorrect
...
error: Bad padding encountered
...
[libprotobuf ERROR google/protobuf/message_lite.cc:123] Can't parse message of type "FileHeader" because it is missing re
quired fields: version
...
error: Can't parse message FileHeader

I think backups made with 1.4.1 are incompatible with 1.4.4, gonna test with a few more backups and gc process

[Vladimir Stackov]

Looks like one of your bundles is damaged (by some external force) before GC.

ZBackup currently does not support bundle recovering and there is an issue so you can track progress: https://github.com/zbackup/zbackup/issues/31

Backups of 1.4.1 are compatible with 1.4.4, all released versions was backward-compatible.

Anyway I've raised an issue to eliminate some risks of GC: https://github.com/zbackup/zbackup/issues/104

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Kind regards,
Vladimir.

[Yusuf Tran]

ok, thanks Vlad