I recently turned log4j's root category of my xwiki to info and I get  
floods of the following exceptions:

2010-08-21 22:21:00,381 INFO  def.DefaultLoadEventListener  - Error  
performing load command
org.hibernate.ObjectNotFoundException: No row with the given  
identifier exists: [com.xpn.xwiki.doc.XWikiDocument#2524421]
         at org.hibernate.impl.SessionFactoryImpl 
$1.handleEntityNotFound(SessionFactoryImpl.java:377)
         at  
org 
.hibernate 
.event.def.DefaultLoadEventListener.load(DefaultLoadEventListener.java: 
145)
         at  
org 
.hibernate 
.event 
.def 
.DefaultLoadEventListener.proxyOrLoad(DefaultLoadEventListener.java:195)
         at  
org 
.hibernate 
.event 
.def.DefaultLoadEventListener.onLoad(DefaultLoadEventListener.java:103)
         at org.hibernate.impl.SessionImpl.fireLoad(SessionImpl.java: 
878)
         at org.hibernate.impl.SessionImpl.load(SessionImpl.java:784)
         at  
com 
.xpn 
.xwiki.store.XWikiHibernateStore.loadXWikiDoc(XWikiHibernateStore.java: 
611)


this sounds dark and probably a performance eater (exceptions always  
are even if not stacktraced). Can anyone suggest me a method to  
identify how to avoid such errors or what they uncover?

thanks in advance

paul
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