Hibernar> CLOB> Oracle :(

Eu estou tentando gravar em um campo de clob do Oracle um valor acima de 4000 caracteres. Isso parece ser um problema comum, mas as soluções parecem não funcionar. Então eu rezo por ajuda daqui.

Informação descendente e suja:
Usando o Oracle 9.2.0.8.0
Hibernate3 implementando o pojo com anotações
Tomcat 6.0.16
Drivers para Oracle 10.2.x
Provedor de pool de conexões C3P0

No meu persistence.xml eu tenho:

<persistence-unit name="DWEB" transaction-type="RESOURCE_LOCAL">
    <provider>org.hibernate.ejb.HibernatePersistence</provider>
    <properties>
        <property name="hibernate.archive.autodetection" value="class"/> 
        <property name="hibernate.connection.password" value="###" />
        <property name="hibernate.connection.username" value="###" />
        <property name="hibernate.default_schema" value="schema" />
        <property name="hibernate.dialect" value="org.hibernate.dialect.Oracle10gDialect" />
        <property name="hibernate.c3p0.min_size" value="5" />
        <property name="hibernate.c3p0.max_size" value="20" />
        <property name="hibernate.c3p0.timeout" value="300" />
        <property name="hibernate.c3p0.max_statements" value="50" />
        <property name="hibernate.c3p0.idle_test_period" value="3000" />
        <property name="show_sql" value="true" />
        <property name="format_sql" value="true" />
        <property name="use_sql_comments" value="true" />
        <property name="SetBigStringTryClob" value="true"/>
        <property name="hibernate.jdbc.batch_size" value="0"/>
        <property name="hibernate.connection.url" value="jdbc:oracle:thin:@server.ss.com:1521:DDD"/>
        <property name="hibernate.connection.driver_class" value="oracle.jdbc.driver.OracleDriver"/>
    </properties>
</persistence-unit>

O getter e setter se parece com:

@Lob 
@Column(name="COMMENT_DOC")
public String getDocument(){
    return get("Document");
}
public void setDocument(String s){
    put("Document",s);
}

A exceção que estou recebendo é:

SEVERE: Servlet.service() for servlet SW threw exception
java.sql.SQLException: Io exception: Software caused connection abort: socket write error
    at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:134)
    at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:179)
    at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:334)
    at oracle.jdbc.ttc7.TTC7Protocol.handleIOException(TTC7Protocol.java:3678)
    at oracle.jdbc.ttc7.TTC7Protocol.doOall7(TTC7Protocol.java:1999)
    at oracle.jdbc.ttc7.TTC7Protocol.parseExecuteFetch(TTC7Protocol.java:1144)
    at oracle.jdbc.driver.OracleStatement.executeNonQuery(OracleStatement.java:2152)
    at oracle.jdbc.driver.OracleStatement.doExecuteOther(OracleStatement.java:2035)
    at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:2876)
    at oracle.jdbc.driver.OraclePreparedStatement.executeUpdate(OraclePreparedStatement.java:609)
    at org.hibernate.jdbc.NonBatchingBatcher.addToBatch(NonBatchingBatcher.java:46)
    at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2275)
    at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2688)
    at org.hibernate.action.EntityInsertAction.execute(EntityInsertAction.java:79)
    at org.hibernate.engine.ActionQueue.execute(ActionQueue.java:279)
    at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:263)
    at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:167)
    at org.hibernate.event.def.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:321)
    at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:50)
    at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1027)
    at org.hibernate.ejb.AbstractEntityManagerImpl.flush(AbstractEntityManagerImpl.java:304)
    at org.sw.website.actions.content.AddComment.performAction(AddComment.java:60)
...

Se eu precisar dar mais informações, pergunte. Tudo funciona até que o limite temido seja excedido.