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List:       jboss-user
Subject:    [JBoss-user] [Management, JMX/JBoss] - NPE in UnifiedClassLoader3 -- UnifiedLoaderRepository3 is nu
From:       Squeak <nukes () jboss ! org>
Date:       2004-04-30 16:18:25
Message-ID: 18307877.1083341905151.JavaMail.root () nukes ! jboss ! org
[Download RAW message or body]

I have had this error creep up on me a couple times here. I can't seem to get a \
consistent pattern to why it is happening. The only thing I do know is that once I \
get it, I have to reboot JBoss to make it go away.

here is the exception stack I get:


  | ROOT CAUSE
  | java.lang.NullPointerException
  |         at org.jboss.mx.loading.LoadMgr3.beginLoadTask(LoadMgr3.java:119)
  |         at org.jboss.mx.loading.UnifiedClassLoader3.loadClassImpl(UnifiedClassLoader3.java:169)
  |         at org.jboss.mx.loading.UnifiedClassLoader3.loadClass(UnifiedClassLoader3.java:123)
  |         at java.lang.ClassLoader.loadClass(ClassLoader.java:235)
  |         at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:302)
  |         at com.inet.tds.a.a(Unknown Source)
  |         at com.inet.tds.u.getObject(Unknown Source)
  |         at com.inet.tds.u.getDouble(Unknown Source)
  |         at com.inet.tds.u.getDouble(Unknown Source)
  |         at org.apache.ojb.broker.util.JdbcTypesHelper$T_Float.readValueFromResultSet(JdbcTypesHelper.java:770)
  |         at org.apache.ojb.broker.util.JdbcTypesHelper$BaseType.getObjectFromColumn(JdbcTypesHelper.java:298)
  |         at org.apache.ojb.broker.util.JdbcTypesHelper$BaseType.getObjectFromColumn(JdbcTypesHelper.java:277)
  |         at org.apache.ojb.broker.accesslayer.RowReaderDefaultImpl.readObjectArrayFrom(RowReaderDefaultImpl.java:123)
  |         at org.apache.ojb.broker.accesslayer.JdbcAccessImpl.materializeObject(JdbcAccessImpl.java:548)
  |         at org.apache.ojb.broker.core.PersistenceBrokerImpl.getDBObject(PersistenceBrokerImpl.java:1232)
  |         at org.apache.ojb.broker.core.PersistenceBrokerImpl.doGetObjectByIdentity(PersistenceBrokerImpl.java:1355)
  |         at org.apache.ojb.broker.core.QueryReferenceBroker.getReferencedObject(QueryReferenceBroker.java:467)
  |         at org.apache.ojb.broker.core.QueryReferenceBroker.retrieveReference(QueryReferenceBroker.java:347)
  |         at org.apache.ojb.broker.core.QueryReferenceBroker.retrieveReferences(QueryReferenceBroker.java:389)
  |         at org.apache.ojb.broker.accesslayer.RsIterator.getObjectFromResultSet(RsIterator.java:470)
  |         at org.apache.ojb.broker.accesslayer.RsIterator.next(RsIterator.java:265)
  |         at org.osn.persistence.PersistenceSessionPBImpl.executeCollectionQuery(PersistenceSessionPBImpl.java:597)
  |         at org.osn.persistence.PersistenceSessionPBImpl.findCollectionByCriteria(PersistenceSessionPBImpl.java:534)
  |         at org.osn.persistence.PersistenceSessionPBImpl.findCollectionByCriteria(PersistenceSessionPBImpl.java:508)
  |         at org.osn.ejb.PersistenceServiceBean.findCollectionByCriteria(PersistenceServiceBean.java:156)
  |         at sun.reflect.GeneratedMethodAccessor57.invoke(Unknown Source)
  |         at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
  |         at java.lang.reflect.Method.invoke(Method.java:324)
  |         at org.jboss.ejb.StatelessSessionContainer$ContainerInterceptor.invoke(StatelessSessionContainer.java:683)
  |         at org.jboss.resource.connectionmanager.CachedConnectionInterceptor.invoke(CachedConnectionInterceptor.java:185)
  |         at org.jboss.ejb.plugins.StatelessSessionInstanceInterceptor.invoke(StatelessSessionInstanceInterceptor.java:72)
  | 

For some reason, the UnifiedLoaderRepository3 that is passed into beginLoadTask has \
become null.

Any thoughts on why this may be?

View the original post : \
http://www.jboss.org/index.html?module=bb&op=viewtopic&p=3833261#3833261

Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&p=3833261



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