On 11 Mar 2014 at 00:25:25, Denis Gervalle
([email protected](mailto:[email protected])) wrote:
> On Mon, Mar 10, 2014 at 11:37 PM, [email protected] wrote:
>
> > Hi Denis,
> >
> > On 10 Mar 2014 at 23:12:14, Denis Gervalle ([email protected](mailto:
> > [email protected])) wrote:
> >
> > > You are saying that users mismatch the DB and the permanent directory,
> > and
> > > you would like to have that fix automagically ? Not only the jobs status
> > > could be there, but also the attachments, and many other permanent data
> > > that will not match the DB.
> > >
> > > I completely agree that mixing inconstantly a DB and a permanent
> > directory
> > > is an annoying issue. I am not sure we could do any magic to fix it. What
> > > could be nice to have is a GUID on the main DB, and in the permanent
> > > directory, that in case of mismatch, prevent the wiki to start fully and
> > > inform the user.
> > >
> > > WDYT ?
> >
> > Indeed, each instance already has a unique id (GUID) stored in the DB :)
> >
>
> I forget about it, since I never get any in my DB... I am not a good xwiki
> citizen, I probably care too much about my privacy :)
>
>
> > So we could also store this value in the distribution’s status.xml file
> > and if the GUID changes (there’s an API to get it) then inform the user
> > that the DB has changed and explain with a nice message the out-of-sync
> > issue and what he has to do to fix it (most likely remove the data/
> > directory which must be in sync with the DB), and throw a servlet exception.
> >
>
> Not sure the status.xml is the perfect place for it. It should not be
> dependent of the DW. This check could probably be done directly in the
> instance id manger, when it could not reach a consistant state between the
> DB and the FS.
Yes I agree it should be independent of the DW files. It should be some new
file created and owned by the instance module to ensure synchronisation between
the data/ dir and the DB.
Cool, another use case for the instance module ;)
Thanks
-Vincent
> I agree it’s safer than trying to fix it automatically.
> >
> > Thanks
> > -Vincent
> >
> > > On Mon, Mar 10, 2014 at 3:45 PM, [email protected] wrote:
> > >
> > > > Hi devs,
> > > >
> > > > Some users are making the following mistake:
> > > > - download the zip/exe and install our standalone distribution
> > > > (jetty/hsqldb)
> > > > - then they configure xwiki to point to another DB (mysql or postgresql
> > > > typically)
> > > > - then they start XWiki and they get an empty page and no DW
> > > >
> > > > The problem is that they don’t/can’t understand that in the standalone
> > > > distribution the data/ directory already has a DW status.xml file that
> > says
> > > > the DW has already been executed and thus do not need to be executed
> > again…
> > > >
> > > > We need to find some strategy to avoid this potential error.
> > > >
> > > > Any idea?
> > > >
> > > > Some ideas:
> > > > - Idea 1: Improve documentation to explain the need to remove the data/
> > > > directory if you change DB
> > > > - Idea 2: In the status.xml, store the DW status along with the DB id
> > so
> > > > that if the DB changes, the DW can kick in again.
> > > > - other?
> > > >
> > > > I personally like idea 2. WDYT?
> > > >
> > > > Thanks
> > > > -Vincent
> > > >
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