Hi Nicolas,
We have detected some issues regarding the migration of statistics tables
in all 4.x version.
We are working hard on fixing these for 4.1.3 which we expect to release
quickly.
If you do not care about statistics, you may empty stats tables, and the
migration should run fine.
Else, you need to wait for 4.1.3.
Sorry for the inconvenience.
On Wed, Jun 27, 2012 at 3:31 PM, CHENEAU-GREHALLE Nicolas <
nicolas.cheneau-grehalle(a)sesam-vitale.fr> wrote:
  Hi,
 I try to install the release 4.1.2 on 3.4.
 During the database migration, there is this error message :
 2012/06/27 13:26:54 [
http://172.24.1.135:8080/xem/bin/view/Main/] INFO
 c.x.x.s.m.h.R40000XWIKI6990DataMigration - [R40000XWIKI6990] -
 Converting 12568 document statistics IDs in 1 tables and 0 collection
 tables...
 2012/06/27 13:26:58 [
http://172.24.1.135:8080/xem/bin/view/Main/] WARN
 o.h.util.JDBCExceptionReporter - SQL Error: 1062, SQLState: 23000
 2012/06/27 13:26:58 [
http://172.24.1.135:8080/xem/bin/view/Main/] ERROR
 o.h.util.JDBCExceptionReporter - Duplicate entry '-5487128615380216001'
 for key 1
 2012/06/27 13:26:58 [
http://172.24.1.135:8080/xem/bin/view/Main/] INFO
 c.x.x.s.m.h.HibernateDataMigrationManager - Failed to migrate database
 [xwiki]...
 com.xpn.xwiki.store.migration.DataMigrationException: Data migration
 R40000XWIKI6990 failed
 Somebody could help me about this message ?
 Even in debug mode, I don't have any information about this duplicate
 entry (which table ? which column ?)
 Thank you for any help.
 Nicolas
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Denis Gervalle
SOFTEC sa - CEO
eGuilde sarl - CTO