See http://extranet.atlassian.com/display/CONFMON/com.atlassian.hibernate.HibernateObjectDao for details, but in short we have a lot of lines like:

      2008-10-20 17:05:40,896 ERROR [TP-Processor16] [com.atlassian.hibernate.HibernateObjectDao] findSingleObject Uh oh - found more than one object when single object requested: 
         [blogpost: Confluence 2.9 M5 Milestone notes v.8 (1646297385), blogpost: Confluence 2.9 M5 Milestone notes v.3 (1646297386)]
       -- referer: http://extranet.atlassian.com/display/PMM/What%27s+New+in+Confluence+2.10?showComments=true&showCommentArea=true | 
         url: /dwr/call/plaincall/WysiwygConverter.convertWikiMarkupToXHtmlWithoutPage.dwr | userName: achowdhury
      

      in the EAC logs.

            [CONFSERVER-13480] "Uh oh" HibernateObjectDao errors

            Hi There

            Thanks for taking the time to raise this issue. As you are no doubt aware this ticket has been on our backlog now for quite some time with very little progress being made. Rather than leaving this issue here I'm going to close this out as won't fix, I believe this better reflects the status of it.

            If the problem is raised again in the future we'll readdress it.

            Regards
            Steve Haffenden
            Confluence Bugmaster

            Steve Haffenden (Inactive) added a comment - Hi There Thanks for taking the time to raise this issue. As you are no doubt aware this ticket has been on our backlog now for quite some time with very little progress being made. Rather than leaving this issue here I'm going to close this out as won't fix, I believe this better reflects the status of it. If the problem is raised again in the future we'll readdress it. Regards Steve Haffenden Confluence Bugmaster

            Seeing this for mail queue objects, causing mail not to flush:

              90 2013-01-17 08:13:39,897 ERROR [http-xxx] [com.atlassian.hibernate.HibernateObjectDao] findSingleObject Uh oh - found more than one object when single object requested: [com.atlassian.confluence.mail.notification.Notification@26c00ce, com.atlassian.confluence.mail.notification.Notification@26c00cf]
            

            Version 4.2

            Ryan Goodwin (Inactive) added a comment - Seeing this for mail queue objects, causing mail not to flush: 90 2013-01-17 08:13:39,897 ERROR [http-xxx] [com.atlassian.hibernate.HibernateObjectDao] findSingleObject Uh oh - found more than one object when single object requested: [com.atlassian.confluence.mail.notification.Notification@26c00ce, com.atlassian.confluence.mail.notification.Notification@26c00cf] Version 4.2

            Still occurring in 3.0 RCs.

            David Taylor (Inactive) added a comment - Still occurring in 3.0 RCs.

            Still occurring, CAC report shows:

            187 ERROR [com.atlassian.hibernate.HibernateObjectDao.findSingleObject] Uh oh - found more than one object when single object requested: [Attachment: DownloadButtonSmall.jpg v.1 (184713237) alui, Attachment: DownloadButtonSmall.jpg v.1 (184713236) alui, Attachment: DownloadButtonSmall.jpg v.1 (184713235) alui]

            in a short period after restart.

            David Taylor (Inactive) added a comment - Still occurring, CAC report shows: 187 ERROR [com.atlassian.hibernate.HibernateObjectDao.findSingleObject] Uh oh - found more than one object when single object requested: [Attachment: DownloadButtonSmall.jpg v.1 (184713237) alui, Attachment: DownloadButtonSmall.jpg v.1 (184713236) alui, Attachment: DownloadButtonSmall.jpg v.1 (184713235) alui] in a short period after restart.

              shaffenden Steve Haffenden (Inactive)
              dtaylor David Taylor (Inactive)
              Affected customers:
              4 This affects my team
              Watchers:
              4 Start watching this issue

                Created:
                Updated:
                Resolved: