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POGenericJDBCException: could not load an entity
 

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    <p>I am trying to read a lazy initialized entity <code>ProductUnits</code> which is a persistent set, and opened a new session for the same. </p> <pre><code>Session session = HibernateUtil.getSessionFactory().openSession(); session.update(stock.getProduct()); List&lt;ProductUnits&gt; units = new ArrayList&lt;ProductUnits&gt;(stock.getProduct().getUnits()); </code></pre> <p>The problem is during the run time it throws the exception</p> <pre><code>org.hibernate.exception.GenericJDBCException: could not load an entity: [hibernate.tables.plain.Product#1] </code></pre> <p>but while doing a <strong>step by step debug it runs perfectly fine</strong>. Is it that the session.update takes some time or am I missing something</p> <p>the exception stack is</p> <pre><code> Exception in thread "AWT-EventQueue-0" org.hibernate.exception.GenericJDBCException: could not load an entity: [hibernate.tables.plain.Product#2] at org.hibernate.exception.SQLStateConverter.handledNonSpecificException(SQLStateConverter.java:126) at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:114) at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:66) at org.hibernate.loader.Loader.loadEntity(Loader.java:1895) at org.hibernate.loader.entity.AbstractEntityLoader.load(AbstractEntityLoader.java:71) at org.hibernate.loader.entity.AbstractEntityLoader.load(AbstractEntityLoader.java:65) at org.hibernate.persister.entity.AbstractEntityPersister.load(AbstractEntityPersister.java:3072) at org.hibernate.event.def.DefaultLoadEventListener.loadFromDatasource(DefaultLoadEventListener.java:434) at org.hibernate.event.def.DefaultLoadEventListener.doLoad(DefaultLoadEventListener.java:415) at org.hibernate.event.def.DefaultLoadEventListener.load(DefaultLoadEventListener.java:165) at org.hibernate.event.def.DefaultLoadEventListener.onLoad(DefaultLoadEventListener.java:121) at org.hibernate.impl.SessionImpl.fireLoad(SessionImpl.java:905) at org.hibernate.impl.SessionImpl.immediateLoad(SessionImpl.java:863) at org.hibernate.proxy.AbstractLazyInitializer.initialize(AbstractLazyInitializer.java:95) at org.hibernate.proxy.AbstractLazyInitializer.getImplementation(AbstractLazyInitializer.java:140) at org.hibernate.proxy.pojo.javassist.JavassistLazyInitializer.invoke(JavassistLazyInitializer.java:190) at hibernate.tables.plain.Product_$$_javassist_15.getUnits(Product_$$_javassist_15.java) at bill.mainBill.InputProductsPanel.computeStockAvailablity(InputProductsPanel.java:278) at bill.mainBill.InputProductsPanel.findStock(InputProductsPanel.java:242) at bill.mainBill.ProductDetailPanel.setStats(ProductDetailPanel.java:315) at bill.mainBill.ProductDetailPanel$3.focusLost(ProductDetailPanel.java:187) at java.awt.AWTEventMulticaster.focusLost(Unknown Source) at java.awt.Component.processFocusEvent(Unknown Source) at java.awt.Component.processEvent(Unknown Source) at java.awt.Container.processEvent(Unknown Source) at java.awt.Component.dispatchEventImpl(Unknown Source) at java.awt.Container.dispatchEventImpl(Unknown Source) at java.awt.Component.dispatchEvent(Unknown Source) at java.awt.KeyboardFocusManager.redispatchEvent(Unknown Source) at java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(Unknown Source) at java.awt.DefaultKeyboardFocusManager.dispatchEvent(Unknown Source) at java.awt.Component.dispatchEventImpl(Unknown Source) at java.awt.Container.dispatchEventImpl(Unknown Source) at java.awt.Component.dispatchEvent(Unknown Source) at java.awt.EventQueue.dispatchEventImpl(Unknown Source) at java.awt.EventQueue.access$000(Unknown Source) at java.awt.EventQueue$3.run(Unknown Source) at java.awt.EventQueue$3.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source) at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source) at java.awt.EventQueue$4.run(Unknown Source) at java.awt.EventQueue$4.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source) at java.awt.EventQueue.dispatchEvent(Unknown Source) at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source) at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source) at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source) at java.awt.EventDispatchThread.pumpEvents(Unknown Source) at java.awt.EventDispatchThread.pumpEvents(Unknown Source) at java.awt.EventDispatchThread.run(Unknown Source) Caused by: java.sql.SQLException: Invalid value for getInt() - 'N' at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1073) at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:987) at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:982) at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:927) at com.mysql.jdbc.ResultSetImpl.getInt(ResultSetImpl.java:2727) at com.mysql.jdbc.ResultSetImpl.getInt(ResultSetImpl.java:2815) at org.hibernate.type.IntegerType.get(IntegerType.java:51) at org.hibernate.type.NullableType.nullSafeGet(NullableType.java:184) at org.hibernate.type.NullableType.nullSafeGet(NullableType.java:173) at org.hibernate.type.AbstractType.hydrate(AbstractType.java:105) at org.hibernate.persister.entity.AbstractEntityPersister.hydrate(AbstractEntityPersister.java:2124) at org.hibernate.loader.Loader.loadFromResultSet(Loader.java:1404) at org.hibernate.loader.Loader.instanceNotYetLoaded(Loader.java:1332) at org.hibernate.loader.Loader.getRow(Loader.java:1230) at org.hibernate.loader.Loader.getRowFromResultSet(Loader.java:603) at org.hibernate.loader.Loader.doQuery(Loader.java:724) at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:259) at org.hibernate.loader.Loader.loadEntity(Loader.java:1881) ... 48 more </code></pre> <p>then mapping file is as follows</p> <pre><code>&lt;?xml version="1.0"?&gt; &lt;!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd"&gt; &lt;!-- Generated Apr 3, 2012 1:21:15 PM by Hibernate Tools 3.4.0.CR1 --&gt; &lt;hibernate-mapping&gt; &lt;class name="hibernate.tables.plain.ProductUnits" table="PRODUCT_UNITS"&gt; &lt;composite-id mapped="false" unsaved-value="undefined"&gt; &lt;key-many-to-one class="hibernate.tables.plain.Product" column="Product_ID" name="product"/&gt; &lt;key-many-to-one class="hibernate.tables.plain.Unit" column="Unit_ID" name="unit"/&gt; &lt;/composite-id&gt; &lt;property generated="never" lazy="false" name="basePrice" type="java.lang.Double"&gt; &lt;column name="BASE_PRICE"/&gt; &lt;/property&gt; &lt;/class&gt; &lt;/hibernate-mapping&gt; </code></pre> <p>and the product mapping</p> <pre><code> &lt;class name="hibernate.tables.plain.Product" table="PRODUCT"&gt; &lt;id name="id" type="java.lang.Long"&gt; &lt;column name="ID" /&gt; &lt;generator class="assigned" /&gt; &lt;/id&gt; &lt;property name="name" type="java.lang.String"&gt; &lt;column name="NAME" /&gt; &lt;/property&gt; &lt;property name="recommendedHolding" type="java.lang.Double"&gt; &lt;column name="RECOMMENDED_HOLDING" /&gt; &lt;/property&gt; &lt;set name="units" table="Product_Units" inverse="false" lazy="true"&gt; &lt;key&gt; &lt;column name="Product_ID" /&gt; &lt;/key&gt; &lt;one-to-many class="hibernate.tables.plain.ProductUnits" /&gt; &lt;/set&gt; &lt;property name="active" type="java.lang.Character"&gt; &lt;column name="ACTIVE" /&gt; &lt;/property&gt; &lt;/class&gt; </code></pre>
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