Hibernate version:
Hibernate 2.1.6

Full stack trace of any exception that occurs:

Name and version of the database you are using:

Firebird 1.5.1 + JayBird JDBC driver 1.5.1 for JDK 1.4



Here is the hibernate.cfg.xml

<?xml version='1.0' encoding='utf-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 2.0//EN"

"http://hibernate.sourceforge.net/hibernate-configuration-2.0.dtd">

<hibernate-configuration>
<session-factory>
<property name="connection.username">sysdba</property>
<property name="connection.password">masterkey</property>
<property name="connection.url">jdbc:firebirdsql://127.0.0.1/c:/db/forum.gdb</property>
<property name="connection.driver_class">org.firebirdsql.jdbc.FBDriver</property>
<property name="dialect">net.sf.hibernate.dialect.FirebirdDialect</property>

<mapping resource="....................."
</session-factory>
</hibernate-configuration>



, ok i have following exception:
2004-09-24 17:30:36,850: ERROR [net.sf.hibernate.collection.PersistentCollection] Failed to lazily initialize a collection
java.lang.NullPointerException: charsetName
at java.io.InputStreamReader.<init>(InputStreamReader.java:82)
at org.firebirdsql.jdbc.field.FBField.getCharacterStream(FBField.java:603)
at org.firebirdsql.jdbc.FBResultSet.getCharacterStream(FBResultSet.java:754)
at net.sf.hibernate.type.TextType.get(TextType.java:29)
at net.sf.hibernate.type.NullableType.nullSafeGet(NullableType.java:62)
at net.sf.hibernate.type.NullableType.nullSafeGet(NullableType.java:53)
at net.sf.hibernate.type.AbstractType.hydrate(AbstractType.java:66)
at net.sf.hibernate.loader.Loader.hydrate(Loader.java:611)
at net.sf.hibernate.loader.Loader.loadFromResultSet(Loader.java:552)
at net.sf.hibernate.loader.Loader.instanceNotYetLoaded(Loader.java:511)
at net.sf.hibernate.loader.Loader.getRow(Loader.java:426)
at net.sf.hibernate.loader.Loader.doQuery(Loader.java:209)
at net.sf.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:133)
at net.sf.hibernate.loader.Loader.loadCollection(Loader.java:915)
at net.sf.hibernate.loader.Loader.loadCollection(Loader.java:890)
at net.sf.hibernate.loader.OneToManyLoader.initialize(OneToManyLoader.java:93)
at net.sf.hibernate.collection.AbstractCollectionPersister.initialize(AbstractCollectionPersister.java:284)
at net.sf.hibernate.impl.SessionImpl.initializeCollection(SessionImpl.java:3264)
at net.sf.hibernate.collection.PersistentCollection.initialize(PersistentCollection.java:195)
at net.sf.hibernate.collection.PersistentCollection.read(PersistentCollection.java:71)
at net.sf.hibernate.collection.Bag.iterator(Bag.java:256)
at org.apache.struts.taglib.logic.IterateTag.doStartTag(IterateTag.java:302)
at org.apache.jsp.messagelist_jsp._jspService(messagelist_jsp.java:158)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:94)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:324)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:237)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157)
at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:704)




did i missed something with Firebird configuration?

i isolate the problem.

This exception, concerning charSet appears only when we are using "text" mapping . Hibernate 2.1.6 generate BLOB type 1 for Firebird.

May be there are some problem with huge text type on Firebird?

I have the same problem with firebird 1.5.
I think i can't use blob field.
That is a big problem!

i've solved this problem by rewriting JetBird driver, so it uses only my custom enconding, and therefore, no NullPoiterException can occur.

Hi!

i have the same problem today and here my solution:

A much better fix for this problem is to set the encoding property for Firebird/Jaybird:



Put it in your hibernate.cfg.xml / hibernate.properties

Now works the text-mapping with firebird blob sub_type 1

greetings
Sergius

OK, my solution was not perfect :(

The Nullpointer was fixed in the newest JayBird driver 2.0.1, this is the best solution!
Driver 1.5.6 has the same bug.