[Xerte-dev] Re: Data Loss: Any idea?

[Julian Tenney]

The nodes aren't in the file.

From: xerte-dev-bounces at lists.nottingham.ac.uk [mailto:xerte-dev-bounces at lists.nottingham.ac.uk] On Behalf Of Pat L (pgogy)
Sent: 29 January 2014 14:18
To: For Xerte technical developers
Subject: [Xerte-dev] Re: Data Loss: Any idea?

The save code compares string lengths as well, so it might be possible the file saves fine, but then confuses itself on opening and omits nodes?

On Wed, Jan 29, 2014 at 2:06 PM, Julian Tenney <Julian.Tenney at nottingham.ac.uk<mailto:Julian.Tenney at nottingham.ac.uk>> wrote:
Both files are the same, both look legit. I can't see how it's possible to lose data and have both closing <learningObject> tags intact either. This has made me suspect the liveware... I always wonder about the liveware, but in this case I don't think it's the culprit. I have been surprised before though ;-)

We've not done anything on the server since this project started. I will check systems haven't done anything.

Cheers,

From: xerte-dev-bounces at lists.nottingham.ac.uk<mailto:xerte-dev-bounces at lists.nottingham.ac.uk> [mailto:xerte-dev-bounces at lists.nottingham.ac.uk<mailto:xerte-dev-bounces at lists.nottingham.ac.uk>] On Behalf Of Ron Mitchell
Sent: 29 January 2014 13:44
To: 'For Xerte technical developers'
Subject: [Xerte-dev] Re: Data Loss: Any idea?

Were you able to compare preview.xml and data.xml?
Is it defintely the same LO or could it me an older copy?
Anythng in the recycle bin of the same name?

As you say everytime I've seen this it's also been because the xml has been broken - never that whole pages have dissapeared without the xml being broken. Sometimes it's been possible to recover the lo by removing the broken preview.xml and replacing with a copy of data.xml or manually closing the broken section. I can't see how it's possible to lose pages without the xml being broken but sounds like it is?

A while back Alistair was having regular problems with broken xml and in the end it seemed to be due to broadband connection problems.

Any automated server backups? Indeed could someone have overwritten the later version during a restore?

HTH
Ron

From: xerte-dev-bounces at lists.nottingham.ac.uk<mailto:xerte-dev-bounces at lists.nottingham.ac.uk> [mailto:xerte-dev-bounces at lists.nottingham.ac.uk] On Behalf Of Julian Tenney
Sent: 29 January 2014 13:17
To: For Xerte technical developers (xerte-dev at lists.nottingham.ac.uk<mailto:xerte-dev at lists.nottingham.ac.uk>)
Subject: [Xerte-dev] Data Loss: Any idea?

I have a user who reports having 29 pages in an LO when she last closed it, now there are only 17.

The file is a complete xml file with opening / closing <learningObject> tags intact, and doesn't appear to be a fragment, or to be cut off in the middle. The XML passes the W3C validator.

Any idea what could have happened to cause the pages to get lost? This is a more advanced user, and the LO has some custom mark up in I (which I did) but I didn't experience any issues building the templates. Every other data loss situation I have come across has been with a file that just ends somewhere in the middle. I've never seen a fully intact xml file and have the user report lost data before.

I'm at a bit of a loss really.


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