[hibernate-issues] [Hibernate-JIRA] Commented: (HHH-5266) NullPointer in toString of PersistentBag

NullPointer in toString of PersistentBag ---------------------------------------- Key: HHH-5266 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-5266 Project: Hibernate Core Issue Type: Bug Components: core Affects Versions: 3.3.2 Reporter: Jan Stolze We have created an interceptor which keeps track of changes during a running transaction so in case of a rollback we can log which changes where issued before the rollback is performed. Now we sometimes see in case a rollback is issued the following stacktrace: exception in interceptor afterTransactionCompletion() java.lang.NullPointerException at org.hibernate.event.def.DefaultInitializeCollectionEventListener.initializeCollectionFromCache(DefaultInitializeCollectionEventListener.java:116) at org.hibernate.event.def.DefaultInitializeCollectionEventListener.onInitializeCollection(DefaultInitializeCollectionEventListener.java:71) at org.hibernate.impl.SessionImpl.initializeCollection(SessionImpl.java:1744) at org.hibernate.collection.AbstractPersistentCollection.initialize(AbstractPersistentCollection.java:366) at org.hibernate.collection.AbstractPersistentCollection.read(AbstractPersistentCollection.java:108) at org.hibernate.collection.PersistentBag.toString(PersistentBag.java:506) at java.lang.String.valueOf(String.java:2826) at java.lang.StringBuilder.append(StringBuilder.java:115) at gti.db.DbRollbackLogginInterceptor$LogEntry.toString(DbRollbackLogginInterceptor.java:246) at java.lang.String.valueOf(String.java:2826) at java.lang.StringBuilder.append(StringBuilder.java:115) at gti.db.DbRollbackLogginInterceptor.logRollback(DbRollbackLogginInterceptor.java:109) at gti.db.DbRollbackLogginInterceptor.afterTransactionCompletion(DbRollbackLogginInterceptor.java:70) at org.hibernate.impl.SessionImpl.afterTransactionCompletion(SessionImpl.java:455) at org.hibernate.jdbc.JDBCContext.afterTransactionCompletion(JDBCContext.java:252) at org.hibernate.transaction.JDBCTransaction.rollback(JDBCTransaction.java:208) at org.hibernate.ejb.TransactionImpl.rollback(TransactionImpl.java:85) We do not have (at this moment) a clear overview of what has happend and what the exact conditions are for this NPE to occur, but think it is still important enough to report.