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mikekonikoff
 Post subject: Oracle blob query returns data w/ hb 3.0.3, null w/ 3.1.3
PostPosted: Tue Jul 11, 2006 6:48 pm 
Newbie

Joined: Fri Oct 14, 2005 4:42 pm
Posts: 15
My web application is in production with hibernate 3.0.3. Trying to upgrade to 3.1.3, but having problems reading serialized blobs. The blob was read and written by my app using hibernate 3.0.3, and is not null, but hibernate 3.1.3 disagrees. SQL*Plus confirms the field has data.

Web Server:
Windows XP SP2
Tomcat 5.5.16 with DBCP 1.2.1
Apache 2.0.55

Hibernate version: 3.1.3

Mapping documents:
Code:
<hibernate-mapping>
    <class name="User" table="T_USERS">
        <cache usage="read-write" />
        <id name="id" type="int" unsaved-value="-1">
            <column name="PK_USER" sql-type="int" not-null="true" />
            <generator class="select">
                <param name="key">tempID</param>
            </generator>
        </id>
        <property name="username" column="USER_ID" />
        <property name="password" column="PASSWORD" />
        <property name="firstName" column="FIRST_NAME" />
        <property name="middleName" column="MIDDLE_NAME" />
        <property name="lastName" column="LAST_NAME" />
        <property name="tempID" column="TEMP_ID" />
        <many-to-one
            name="prefs"
            class="org.etdm.model.UserPrefs">
            <column name="FK_USER_PREFS" />
        </many-to-one>
    </class>

    <class name="UserPrefs" table="T_USER_PREFS" lazy="true">
        <cache usage="read-write" />
        <id name="id" type="int" unsaved-value="-1">
            <column name="PK_USER_PREFS" sql-type="int" not-null="true" />
            <generator class="select">
                <param name="key">tempID</param>
            </generator>
        </id>
        <property name="sessionState" column="SESSION_STATE" lazy="true"/>
        <property name="tempID" column="TEMP_ID" />
    </class>
</hibernate-mapping>


Code between sessionFactory.openSession() and session.close():
Code:
    SessionFactory sessionFactory;
    ThreadLocal hibernateSession;

    // called exactly once on web app startup
    public boolean startHibernate() {
        try {
            hibernateSession = new ThreadLocal();
            Configuration configuration = new Configuration();

            // add hbm files to configuration....

            configuration.configure(new File(application.getRealPath("/WEB-INF/hibernate/hibernate.cfg.xml")));
            sessionFactory = configuration.buildSessionFactory();
        } catch (Exception ex) {
            System.out.println(ex);
            hibernateException = ex;
            return false;
        }
        return true;
    }

    public Session newHibernateSession() throws HibernateException {
        if (hibernateSession.get() != null) {
            closeHibernateSession();
        }
        Session s = sessionFactory.openSession();
        hibernateSession.set(s);
        s.setCacheMode(CacheMode.NORMAL);
        return s;
    }

    // called by JSP to get hibernate session
    public Session currentHibernateSession() throws HibernateException {
        Session s = (Session)hibernateSession.get();
        if (s == null || !s.isOpen() || !s.isConnected()) {
            closeHibernateSession();
            return newHibernateSession();
        }
        return s;
    }

    // also called when HTTP session is destroyed
    public void closeHibernateSession() throws HibernateException {
        Session s = (Session)hibernateSession.get();
        hibernateSession.set(null);
        if (s != null)
            s.close();
    }


Full stack trace of any exception that occurs:
Jul 11, 2006 5:59:46 PM org.hibernate.type.NullableType nullSafeGet
INFO: could not read column value from result set: SESSION2_122_0_; null
Jul 11, 2006 5:59:46 PM org.hibernate.jdbc.AbstractBatcher closeQueryStatement
WARNING: exception clearing maxRows/queryTimeout
java.sql.SQLException: org.apache.tomcat.dbcp.dbcp.DelegatingPreparedStatement is closed.
at org.apache.tomcat.dbcp.dbcp.DelegatingStatement.checkOpen(DelegatingStatement.java:136)
at org.apache.tomcat.dbcp.dbcp.DelegatingStatement.getMaxRows(DelegatingStatement.java:234)
at org.hibernate.jdbc.AbstractBatcher.closeQueryStatement(AbstractBatcher.java:225)
at org.hibernate.jdbc.AbstractBatcher.closeQueryStatement(AbstractBatcher.java:162)
at org.hibernate.loader.Loader.doQuery(Loader.java:714)
at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:224)
at org.hibernate.loader.Loader.loadEntity(Loader.java:1785)
at org.hibernate.loader.entity.AbstractEntityLoader.load(AbstractEntityLoader.java:47)
at org.hibernate.loader.entity.AbstractEntityLoader.load(AbstractEntityLoader.java:41)
at org.hibernate.persister.entity.AbstractEntityPersister.load(AbstractEntityPersister.java:2730)
at org.hibernate.event.def.DefaultLoadEventListener.loadFromDatasource(DefaultLoadEventListener.java:365)
at org.hibernate.event.def.DefaultLoadEventListener.doLoad(DefaultLoadEventListener.java:346)
at org.hibernate.event.def.DefaultLoadEventListener.load(DefaultLoadEventListener.java:123)
at org.hibernate.event.def.DefaultLoadEventListener.proxyOrLoad(DefaultLoadEventListener.java:177)
at org.hibernate.event.def.DefaultLoadEventListener.onLoad(DefaultLoadEventListener.java:87)
at org.hibernate.impl.SessionImpl.fireLoad(SessionImpl.java:862)
at org.hibernate.impl.SessionImpl.internalLoad(SessionImpl.java:830)
at org.hibernate.type.EntityType.resolveIdentifier(EntityType.java:266)
at org.hibernate.type.EntityType.resolve(EntityType.java:303)
at org.hibernate.engine.TwoPhaseLoad.initializeEntity(TwoPhaseLoad.java:116)
at org.hibernate.loader.Loader.initializeEntitiesAndCollections(Loader.java:842)
at org.hibernate.loader.Loader.doQuery(Loader.java:717)
at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:224)
at org.hibernate.loader.Loader.doList(Loader.java:2145)
at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2029)
at org.hibernate.loader.Loader.list(Loader.java:2024)
at org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:375)
at org.hibernate.hql.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:308)
at org.hibernate.engine.query.HQLQueryPlan.performList(HQLQueryPlan.java:153)
at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1106)
at org.hibernate.impl.QueryImpl.list(QueryImpl.java:79)
at org.hibernate.impl.AbstractQueryImpl.uniqueResult(AbstractQueryImpl.java:749)
at org.more.do.SessionFilter.doFilter(SessionFilter.java:50)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:482)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
at org.apache.catalina.authenticator.SingleSignOn.invoke(SingleSignOn.java:365)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
at org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:307)
at org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:385)
at org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:748)
at org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java:678)
at org.apache.jk.common.SocketConnection.runIt(ChannelSocket.java:871)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
at java.lang.Thread.run(Thread.java:595)
Jul 11, 2006 5:59:46 PM org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Servlet.service() for servlet jsp threw exception
java.lang.NullPointerException
at oracle.jdbc.driver.OracleStatement.wasNullValue(OracleStatement.java:3016)
at oracle.jdbc.driver.OracleResultSetImpl.wasNull(OracleResultSetImpl.java:111)
at org.apache.tomcat.dbcp.dbcp.DelegatingResultSet.wasNull(DelegatingResultSet.java:171)
at org.hibernate.type.NullableType.nullSafeGet(NullableType.java:114)
at org.hibernate.type.NullableType.nullSafeGet(NullableType.java:102)
at org.hibernate.type.AbstractType.hydrate(AbstractType.java:81)
at org.hibernate.persister.entity.AbstractEntityPersister.hydrate(AbstractEntityPersister.java:1899)
at org.hibernate.loader.Loader.loadFromResultSet(Loader.java:1372)
at org.hibernate.loader.Loader.instanceNotYetLoaded(Loader.java:1300)
at org.hibernate.loader.Loader.getRow(Loader.java:1197)
at org.hibernate.loader.Loader.getRowFromResultSet(Loader.java:569)
at org.hibernate.loader.Loader.doQuery(Loader.java:689)
at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:224)
at org.hibernate.loader.Loader.loadEntity(Loader.java:1785)
at org.hibernate.loader.entity.AbstractEntityLoader.load(AbstractEntityLoader.java:47)
at org.hibernate.loader.entity.AbstractEntityLoader.load(AbstractEntityLoader.java:41)
at org.hibernate.persister.entity.AbstractEntityPersister.load(AbstractEntityPersister.java:2730)
at org.hibernate.event.def.DefaultLoadEventListener.loadFromDatasource(DefaultLoadEventListener.java:365)
at org.hibernate.event.def.DefaultLoadEventListener.doLoad(DefaultLoadEventListener.java:346)
at org.hibernate.event.def.DefaultLoadEventListener.load(DefaultLoadEventListener.java:123)
at org.hibernate.event.def.DefaultLoadEventListener.proxyOrLoad(DefaultLoadEventListener.java:177)
at org.hibernate.event.def.DefaultLoadEventListener.onLoad(DefaultLoadEventListener.java:87)
at org.hibernate.impl.SessionImpl.fireLoad(SessionImpl.java:862)
at org.hibernate.impl.SessionImpl.internalLoad(SessionImpl.java:830)
at org.hibernate.type.EntityType.resolveIdentifier(EntityType.java:266)
at org.hibernate.type.EntityType.resolve(EntityType.java:303)
at org.hibernate.engine.TwoPhaseLoad.initializeEntity(TwoPhaseLoad.java:116)
at org.hibernate.loader.Loader.initializeEntitiesAndCollections(Loader.java:842)
at org.hibernate.loader.Loader.doQuery(Loader.java:717)
at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:224)
at org.hibernate.loader.Loader.doList(Loader.java:2145)
at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2029)
at org.hibernate.loader.Loader.list(Loader.java:2024)
at org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:375)
at org.hibernate.hql.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:308)
at org.hibernate.engine.query.HQLQueryPlan.performList(HQLQueryPlan.java:153)
at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1106)
at org.hibernate.impl.QueryImpl.list(QueryImpl.java:79)
at org.hibernate.impl.AbstractQueryImpl.uniqueResult(AbstractQueryImpl.java:749)
at org.more.do.SessionFilter.doFilter(SessionFilter.java:50)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:482)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
at org.apache.catalina.authenticator.SingleSignOn.invoke(SingleSignOn.java:365)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
at org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:307)
at org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:385)
at org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:748)
at org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java:678)
at org.apache.jk.common.SocketConnection.runIt(ChannelSocket.java:871)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
at java.lang.Thread.run(Thread.java:595)

Name and version of the database you are using:
Oracle9i Enterprise Edition Release 9.2.0.1.0 - 64bit Production
JDBC driver: Oracle JDBC driver, version: 10.1.0.2.0

The generated SQL (show_sql=true):
Hibernate: select user0_.PK_USER as PK1_120_, user0_.USER_ID as USER2_120_, user0_.PASSWORD as PASSWORD120_, user0_.FIRST_NAME as FIRST4_120_, user0_.MIDDLE_NAME as MIDDLE5_120_, user0_.LAST_NAME as LAST6_120_, user0_.TEMP_ID as TEMP7_120_, user0_.FK_USER_PREFS as FK8_120_ from T_USERS user0_ where user0_.USER_ID=?
Hibernate: select userprefs0_.PK_USER_PREFS as PK1_122_0_, userprefs0_.SESSION_STATE as SESSION2_122_0_, userprefs0_.TEMP_ID as TEMP3_122_0_ from T_USER_PREFS userprefs0_ where userprefs0_.PK_USER_PREFS=?

SessionFilter does the following to generate the above SQL:
Code:
            // userID is set elsewhere. it's not null.
            Integer userID = (Integer)session.getAttribute("userID");
            Query q = appManager.currentHibernateSession().createQuery("from User where id = ?");
            q.setInteger(0,userID.intValue());
            currentUser = (User)q.uniqueResult();


Both the user record and user_prefs record exist and are not null. All I've changed is hibernate3.jar file.

Can anyone help?


Last edited by mikekonikoff on Wed Jul 12, 2006 12:59 pm, edited 5 times in total.

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mikekonikoff
 Post subject: ...more info
PostPosted: Tue Jul 11, 2006 7:10 pm 
Newbie

Joined: Fri Oct 14, 2005 4:42 pm
Posts: 15
Also, I have the system property set:

-Dhibernate.jdbc.use_streams_for_binary=true

And here are my POJOs:

Code:

import java.util.*;

public class User {
    private int id = -1;
    private String username;
    private String password;
    private String firstName;
    private String middleName;
    private String lastName;
    private UserPrefs prefs;
    private Long tempID = new Long(System.currentTimeMillis());

    public User() {
    }

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public String getFirstName() {
        return firstName;
    }

    public void setFirstName(String firstName) {
        this.firstName = firstName;
    }

    public String getMiddleName() {
        return middleName;
    }

    public void setMiddleName(String middleName) {
        this.middleName = middleName;
    }

    public String getLastName() {
        return lastName;
    }

    public void setLastName(String lastName) {
        this.lastName = lastName;
    }

    public String getName() {
        StringBuffer name = new StringBuffer(180);
        name.append(this.firstName).append(" ");
        if (this.middleName != null) name.append(this.middleName).append(" ");
        name.append(this.lastName);
        return name.toString();
    }

    public Long getTempID() {
        return tempID;
    }

    public void setTempID(Long tempID) {
        this.tempID = tempID;
    }

    public UserPrefs getPrefs() {
        return prefs;
    }

    public void setPrefs(UserPrefs prefs) {
        this.prefs = prefs;
    }

}




Code:
import SessionState;
import org.hibernate.Session;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.HashMap;

public class UserPrefs implements Serializable {
    private int id = -1;
    private HashMap storedState;
    private SessionState sessionState;
    private Long tempID = new Long(System.currentTimeMillis());

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public SessionState getSessionState() {
        return sessionState;
    }

    public void setSessionState(SessionState sessionState) {
        this.sessionState = sessionState;
    }

    public Long getTempID() {
        return tempID;
    }

    public void setTempID(Long tempID) {
        this.tempID = tempID;
    }
}




Code:

import ImmutableList;
import java.util.*;
import java.io.*;

public class SessionState implements Serializable {
    public ArrayList bookmarks;
    public ArrayList savedSelections;
    public ArrayList historySelections;

    public SessionState() { }

    public List getBookmarks() {
        return new ImmutableList(bookmarks);
    }

    public List getSavedSelections() {
        return new ImmutableList(savedSelections);
    }

    public List getHistorySelections() {
        return new ImmutableList(historySelections);
    }

    private void readObject(ObjectInputStream in) throws IOException, ClassNotFoundException {
        ObjectInputStream.GetField fields = in.readFields();
        bookmarks= (ArrayList)fields.get("bookmarks", new ArrayList());
        savedSelections = (ArrayList)fields.get("savedSelections",new ArrayList());
        historySelections = (ArrayList)fields.get("historySelections",new ArrayList());
    }

    private void writeObject(ObjectOutputStream out) throws IOException {
        ObjectOutputStream.PutField fields = out.putFields();
        fields.put("bookmarks", bookmarks);
        fields.put("savedSelections",savedSelections);
        fields.put("historySelections",historySelections);
        out.writeFields();
    }


Code:
import java.util.List;
import java.util.Iterator;
import java.util.Collection;
import java.util.ListIterator;

public class ImmutableList implements List {
    private List list;

    public ImmutableList(List list) {
        this.list = list;
    }

    public int size() {
        return list.size();
    }

    public boolean isEmpty() {
        return list.isEmpty();
    }

    public boolean contains(Object o) {
        return list.contains(o);
    }

    public Iterator iterator() {
        return new ImmutableIterator(list.iterator());
    }

    public Object[] toArray() {
        return list.toArray();
    }

    public Object[] toArray(Object[] a) throws ArrayStoreException {
        return list.toArray(a);
    }

    public boolean add(Object o) throws UnsupportedOperationException {
        throw new UnsupportedOperationException("The contents of an ImmutableList cannot be altered");
    }

    public boolean remove(Object o) throws UnsupportedOperationException {
        throw new UnsupportedOperationException("The contents of an ImmutableList cannot be altered");
    }

    public boolean containsAll(Collection c) {
        return list.containsAll(c);
    }

    public boolean addAll(Collection c) throws UnsupportedOperationException {
        throw new UnsupportedOperationException("The contents of an ImmutableList cannot be altered");
    }

    public boolean addAll(int index, Collection c) throws UnsupportedOperationException {
        throw new UnsupportedOperationException("The contents of an ImmutableList cannot be altered");
    }

    public boolean removeAll(Collection c) throws UnsupportedOperationException {
        throw new UnsupportedOperationException("The contents of an ImmutableList cannot be altered");
    }

    public boolean retainAll(Collection c) throws UnsupportedOperationException {
        throw new UnsupportedOperationException("The contents of an ImmutableList cannot be altered");
    }

    public void clear() throws UnsupportedOperationException {
        throw new UnsupportedOperationException("The contents of an ImmutableList cannot be altered");
    }

    public boolean equals(Object o) {
        return list.equals(o);
    }

    public int hashCode() {
        return list.hashCode();
    }

    public Object get(int index) throws IndexOutOfBoundsException {
        return list.get(index);
    }

    public Object set(int index, Object element) throws UnsupportedOperationException {
        throw new UnsupportedOperationException("The contents of an ImmutableList cannot be altered");
    }

    public void add(int index, Object element) throws UnsupportedOperationException {
        throw new UnsupportedOperationException("The contents of an ImmutableList cannot be altered");
    }

    public Object remove(int index) throws UnsupportedOperationException {
        throw new UnsupportedOperationException("The contents of an ImmutableList cannot be altered");
    }

    public int indexOf(Object o) {
        return list.indexOf(o);
    }

    public int lastIndexOf(Object o) {
        return list.lastIndexOf(o);
    }

    public ListIterator listIterator() {
        return new ImmutableListIterator(list.listIterator());
    }

    public ListIterator listIterator(int index) throws IndexOutOfBoundsException {
        return new ImmutableListIterator(list.listIterator(index));
    }

    public List subList(int fromIndex, int toIndex) throws IndexOutOfBoundsException {
        return new ImmutableList(list.subList(fromIndex,toIndex));
    }
}


And here is some DDL:
Code:
CREATE TABLE T_USERS (
    PK_USER NUMBER(10) NOT NULL,
    USER_ID VARCHAR2(20) NOT NULL,
    PASSWORD VARCHAR2(20) NOT NULL,
    TEMP_ID NUMBER(20),
    FIRST_NAME VARCHAR2(60) NOT NULL,
    MIDDLE_NAME VARCHAR2(60),
    LAST_NAME VARCHAR2(60) NOT NULL,
    FK_USER_PREFS NUMBER(10),
    CONSTRAINT T_USERS_PK PRIMARY KEY(PK_USER)
    CONSTRAINT T_USERS_FK1 FOREIGN KEY(FK_USER_PREFS)
    REFERENCES T_USER_PREFS(PK_USER_PREFS));

CREATE SEQUENCE T_USERS_SEQ INCREMENT BY 1 START WITH
    1 MAXVALUE 1.0E27 MINVALUE 1 NOCYCLE
    CACHE 20 NOORDER;

CREATE OR REPLACE TRIGGER PK_USER_TRIG BEFORE
INSERT ON T_USERS FOR EACH ROW BEGIN
SELECT T_USERS_SEQ.NEXTVAL INTO :NEW.PK_USER FROM DUAL;
END;
/

CREATE TABLE T_USER_PREFS (
    PK_USER_PREFS NUMBER(10) NOT NULL,
    TEMP_ID NUMBER(20),
    SESSION_STATE BLOB,
    CONSTRAINT T_USER_PREFS_PK PRIMARY KEY(PK_USER_PREFS));

CREATE SEQUENCE T_USER_PREFS_SEQ INCREMENT BY 1 START WITH
    1 MAXVALUE 1.0E27 MINVALUE 1 NOCYCLE
    CACHE 20 NOORDER;

CREATE OR REPLACE TRIGGER PK_USER_PREFS_TRIG BEFORE
INSERT ON T_USER_PREFS FOR EACH ROW BEGIN
SELECT T_USER_PREFS_SEQ.NEXTVAL INTO :NEW.PK_USER_PREFS FROM DUAL;
END;
/
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