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  1. XWiki Platform
  2. XWIKI-7775

Deleting and recreating a subwiki does not work (throws exception)

    Details

    • Type: Bug
    • Status: Closed
    • Priority: Critical
    • Resolution: Duplicate
    • Affects Version/s: 3.5, 4.0-rc-1
    • Fix Version/s: None
    • Component/s: Old Core
    • Labels:
      None
    • Difficulty:
      Unknown
    • Similar issues:

      Description

      To reproduce, in a multiwiki instance:

      • create a subwiki (I used WikiManager.CreateNewWiki but I don't think workspaces changes anything)
      • delete it
      • re-create the same subwiki: you won't be able to complete, you'll get an error.
        The exception is something like this
        La création du wiki "wikitemplate" a échoué : Error number 50035 in 5: Exception in plugin xpn.xwiki.plugin.wikimanager.Wiki Manager Plugin?: Wiki wikitemplate? database update failed Wrapped Exception: Error number 3202 in 3: Exception while reading document name = [XWiki Preferences?, type = DOCUMENT?, parent = name = [XWiki?, type = SPACE?, parent = name = [wikitemplate?, type = WIKI?, parent = null?]]] Wrapped Exception: could not load an entity: xpn.xwiki.doc.XWiki Document?.
        

        and in the logs there is something like this

        2012-04-30 15:42:11,057 [http://localhost:8080/xwiki/bin/view/WikiManager/CreateNewWiki?wikiname=wikitemplate&XWiki.XWikiServerClass_0_wikiprettyname=Wikitemplate&XWiki.XWikiServerClass_0_description=Template+de+wiki&XWiki.XWikiServerClass_0_server=wikitemplate&XWiki.XWikiServerClass_0_owner=XWiki.Admin&XWiki.XWikiServerClass_0_owner=&form_token=xzmqd1ltxjjhsN56v4ccLw&actioncreate=Cr%C3%A9er] ERROR o.h.u.JDBCExceptionReporter    - Table 'wikitemplate.xwikidoc' doesn't exist 
        

      This is caused because the subwiki database schema is not initialized, so initializeXWikiClasses() which is done upon creation of the subwiki, is trying to get a table which doesn't exist.

      The reason for which the subwiki schema is not initialized is because, in the function

      com.xpn.xwiki.store.migration.AbstractDataMigrationManager.checkDatabase()

      , where a new database should be initialized, the newly re-created wiki fails to be seen as new database, because of the database version cache. The function com.xpn.xwiki.store.migration.AbstractDataMigrationManager.getDBVersion() will get the version of the wikitemplate database from the cache, and will think it's great and up to date. The fix would be to clear this cache when a subwiki is deleted.

      Note that, of course, since this it's a cache issue, a server restart between the delete and the re-create will work perfectly fine as a workaround.

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              • Assignee:
                enygma Eduard Moraru
                Reporter:
                lucaa Anca Luca
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                • Created:
                  Updated:
                  Resolved: