Erreur "JDBC Connection Exception"

**n@n¤u** · 28/02/2007, 09h37

Bonjour,

En développant ma première application J2EE (Struts, Hibernate), j'ai souvent une erreur qui concerne l'accès à ma BDD MySQL.

Voici l'erreur que j'ai :

org.hibernate.exception.JDBCConnectionException: could not execute query using iterate
at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:74)
at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:43)
at org.hibernate.loader.hql.QueryLoader.iterate(QueryLoader.java:420)
at org.hibernate.hql.ast.QueryTranslatorImpl.iterate(QueryTranslatorImpl.java:318)
at org.hibernate.engine.query.HQLQueryPlan.performIterate(HQLQueryPlan.java:177)
at org.hibernate.impl.SessionImpl.iterate(SessionImpl.java:1156)
at org.hibernate.impl.QueryImpl.iterate(QueryImpl.java:46)
at utils.LogIn.isAllowed(Unknown Source)
at utils.LogIn.execute(Unknown Source)
at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:419)
at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:224)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:432)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:763)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
at sun.reflect.GeneratedMethodAccessor99.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.apache.catalina.security.SecurityUtil$1.run(SecurityUtil.java:243)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAsPrivileged(Subject.java:517)
at org.apache.catalina.security.SecurityUtil.execute(SecurityUtil.java:275)
at org.apache.catalina.security.SecurityUtil.doAsPrivilege(SecurityUtil.java:161)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:245)
at org.apache.catalina.core.ApplicationFilterChain.access$000(ApplicationFilterChain.java:50)
at org.apache.catalina.core.ApplicationFilterChain$1.run(ApplicationFilterChain.java:156)
at java.security.AccessController.doPrivileged(Native Method)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:152)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
at org.objectweb.jonas.web.catalina55.ResetAuthenticationValve.invoke(ResetAuthenticationValve.java:62)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:667)
at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
at java.lang.Thread.run(Thread.java:595)
Caused by: java.sql.SQLException: No operations allowed after connection closed.Connection was implicitly closed due to underlying exception/
error:

** BEGIN NESTED EXCEPTION **

com.mysql.jdbc.CommunicationsException
MESSAGE: Communications link failure due to underlying exception:

** BEGIN NESTED EXCEPTION **

java.net.SocketException
MESSAGE: Software caused connection abort: socket write error

STACKTRACE:

java.net.SocketException: Software caused connection abort: socket write error
at java.net.SocketOutputStream.socketWrite0(Native Method)
at java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:92)
at java.net.SocketOutputStream.write(SocketOutputStream.java:136)
at java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:65)
at java.io.BufferedOutputStream.flush(BufferedOutputStream.java:123)
at com.mysql.jdbc.MysqlIO.send(MysqlIO.java:2692)
at com.mysql.jdbc.MysqlIO.send(MysqlIO.java:2621)
at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1552)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1666)
at com.mysql.jdbc.Connection.execSQL(Connection.java:2994)
at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:936)
at com.mysql.jdbc.PreparedStatement.executeQuery(PreparedStatement.java:1030)
at org.hibernate.jdbc.AbstractBatcher.getResultSet(AbstractBatcher.java:139)
at org.hibernate.loader.Loader.getResultSet(Loader.java:1669)
at org.hibernate.loader.hql.QueryLoader.iterate(QueryLoader.java:397)
at org.hibernate.hql.ast.QueryTranslatorImpl.iterate(QueryTranslatorImpl.java:318)
at org.hibernate.engine.query.HQLQueryPlan.performIterate(HQLQueryPlan.java:177)
at org.hibernate.impl.SessionImpl.iterate(SessionImpl.java:1156)
at org.hibernate.impl.QueryImpl.iterate(QueryImpl.java:46)
at utils.LogIn.isAllowed(Unknown Source)
at utils.LogIn.execute(Unknown Source)
at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:419)
at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:224)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:432)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:763)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
at sun.reflect.GeneratedMethodAccessor99.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.apache.catalina.security.SecurityUtil$1.run(SecurityUtil.java:243)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAsPrivileged(Subject.java:517)
at org.apache.catalina.security.SecurityUtil.execute(SecurityUtil.java:275)
at org.apache.catalina.security.SecurityUtil.doAsPrivilege(SecurityUtil.java:161)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:245)
at org.apache.catalina.core.ApplicationFilterChain.access$000(ApplicationFilterChain.java:50)
at org.apache.catalina.core.ApplicationFilterChain$1.run(ApplicationFilterChain.java:156)
at java.security.AccessController.doPrivileged(Native Method)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:152)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
at org.objectweb.jonas.web.catalina55.ResetAuthenticationValve.invoke(ResetAuthenticationValve.java:62)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:667)
at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
at java.lang.Thread.run(Thread.java:595)

** END NESTED EXCEPTION **

Last packet sent to the server was 0 ms ago.

STACKTRACE:

com.mysql.jdbc.CommunicationsException: Communications link failure due to underlying exception:

** BEGIN NESTED EXCEPTION **

java.net.SocketException
MESSAGE: Software caused connection abort: socket write error

STACKTRACE:

java.net.SocketException: Software caused connection abort: socket write error
at java.net.SocketOutputStream.socketWrite0(Native Method)
at java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:92)
at java.net.SocketOutputStream.write(SocketOutputStream.java:136)
at java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:65)
at java.io.BufferedOutputStream.flush(BufferedOutputStream.java:123)
at com.mysql.jdbc.MysqlIO.send(MysqlIO.java:2692)
at com.mysql.jdbc.MysqlIO.send(MysqlIO.java:2621)
at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1552)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1666)
at com.mysql.jdbc.Connection.execSQL(Connection.java:2994)
at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:936)
at com.mysql.jdbc.PreparedStatement.executeQuery(PreparedStatement.java:1030)
at org.hibernate.jdbc.AbstractBatcher.getResultSet(AbstractBatcher.java:139)
at org.hibernate.loader.Loader.getResultSet(Loader.java:1669)
at org.hibernate.loader.hql.QueryLoader.iterate(QueryLoader.java:397)
at org.hibernate.hql.ast.QueryTranslatorImpl.iterate(QueryTranslatorImpl.java:318)
at org.hibernate.engine.query.HQLQueryPlan.performIterate(HQLQueryPlan.java:177)
at org.hibernate.impl.SessionImpl.iterate(SessionImpl.java:1156)
at org.hibernate.impl.QueryImpl.iterate(QueryImpl.java:46)
at utils.LogIn.isAllowed(Unknown Source)
at utils.LogIn.execute(Unknown Source)
at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:419)
at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:224)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:432)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:763)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
at sun.reflect.GeneratedMethodAccessor99.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.apache.catalina.security.SecurityUtil$1.run(SecurityUtil.java:243)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAsPrivileged(Subject.java:517)
at org.apache.catalina.security.SecurityUtil.execute(SecurityUtil.java:275)
at org.apache.catalina.security.SecurityUtil.doAsPrivilege(SecurityUtil.java:161)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:245)
at org.apache.catalina.core.ApplicationFilterChain.access$000(ApplicationFilterChain.java:50)
at org.apache.catalina.core.ApplicationFilterChain$1.run(ApplicationFilterChain.java:156)
at java.security.AccessController.doPrivileged(Native Method)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:152)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
at org.objectweb.jonas.web.catalina55.ResetAuthenticationValve.invoke(ResetAuthenticationValve.java:62)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:667)
at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
at java.lang.Thread.run(Thread.java:595)

** END NESTED EXCEPTION **

Last packet sent to the server was 0 ms ago.
at com.mysql.jdbc.MysqlIO.send(MysqlIO.java:2710)
at com.mysql.jdbc.MysqlIO.send(MysqlIO.java:2621)
at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1552)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1666)
at com.mysql.jdbc.Connection.execSQL(Connection.java:2994)
at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:936)
at com.mysql.jdbc.PreparedStatement.executeQuery(PreparedStatement.java:1030)
at org.hibernate.jdbc.AbstractBatcher.getResultSet(AbstractBatcher.java:139)
at org.hibernate.loader.Loader.getResultSet(Loader.java:1669)
at org.hibernate.loader.hql.QueryLoader.iterate(QueryLoader.java:397)
at org.hibernate.hql.ast.QueryTranslatorImpl.iterate(QueryTranslatorImpl.java:318)
at org.hibernate.engine.query.HQLQueryPlan.performIterate(HQLQueryPlan.java:177)
at org.hibernate.impl.SessionImpl.iterate(SessionImpl.java:1156)
at org.hibernate.impl.QueryImpl.iterate(QueryImpl.java:46)
at utils.LogIn.isAllowed(Unknown Source)
at utils.LogIn.execute(Unknown Source)
at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:419)
at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:224)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:432)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:763)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
at sun.reflect.GeneratedMethodAccessor99.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.apache.catalina.security.SecurityUtil$1.run(SecurityUtil.java:243)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAsPrivileged(Subject.java:517)
at org.apache.catalina.security.SecurityUtil.execute(SecurityUtil.java:275)
at org.apache.catalina.security.SecurityUtil.doAsPrivilege(SecurityUtil.java:161)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:245)
at org.apache.catalina.core.ApplicationFilterChain.access$000(ApplicationFilterChain.java:50)
at org.apache.catalina.core.ApplicationFilterChain$1.run(ApplicationFilterChain.java:156)
at java.security.AccessController.doPrivileged(Native Method)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:152)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
at org.objectweb.jonas.web.catalina55.ResetAuthenticationValve.invoke(ResetAuthenticationValve.java:62)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:667)
at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
at java.lang.Thread.run(Thread.java:595)

** END NESTED EXCEPTION **

at com.mysql.jdbc.Connection.checkClosed(Connection.java:1842)
at com.mysql.jdbc.Connection.prepareStatement(Connection.java:4260)
at com.mysql.jdbc.Connection.prepareStatement(Connection.java:4226)
at org.hibernate.jdbc.AbstractBatcher.getPreparedStatement(AbstractBatcher.java:442)
at org.hibernate.jdbc.AbstractBatcher.getPreparedStatement(AbstractBatcher.java:368)
at org.hibernate.jdbc.AbstractBatcher.prepareQueryStatement(AbstractBatcher.java:105)
at org.hibernate.loader.Loader.prepareQueryStatement(Loader.java:1561)
at org.hibernate.loader.hql.QueryLoader.iterate(QueryLoader.java:392)
... 38 more

Etant encore nouveau, j'ai surement oublié de configurer quelques params...

Quelqu'un saurait-il m'indiquer comment résoudre ce problème ?

Merci d'avance pour votre aide.

**willoi** · 28/02/2007, 09h41

Bonjour,

Si tu nous montre pas le code où tu effectues ta connexion, on ne va pas pouvoir t'aider.

Ca se situe dans le fichier config d'Hibernate normalement : hibernate.cfg.xml

**n@n¤u** · 28/02/2007, 10h46

Oups, désolé.
Le voici :

Code :

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<?xml version='1.0' encoding='utf-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
 
<hibernate-configuration>
	<session-factory>
		<property name="hibernate.connection.driver_class">
			com.mysql.jdbc.Driver
		</property>
		<property name="hibernate.connection.url">
			jdbc:mysql://localhost/suivi_activite
		</property>
		<property name="hibernate.connection.username">root</property>
		<property name="hibernate.connection.password"></property>
		<property name="hibernate.connection.pool_size">1</property>
 
		<property name="show_sql">false</property>
		<property name="dialect">
			org.hibernate.dialect.MySQLDialect
		</property>
		<property name="hibernate.hbm2ddl.auto">update</property>
 
		<!-- Mapping files -->
		<mapping resource="mapping_tables.hbm.xml" />
		<mapping resource="mapping_soutien.hbm.xml" />
		<mapping resource="mapping_os.hbm.xml" />
	</session-factory>
</hibernate-configuration>

**OButterlin** · 28/02/2007, 10h49

Tu peux montrer le code de l'appelant (utils.LogIn.isAllowed)

**n@n¤u** · 28/02/2007, 10h53

Le voici, (merci pour votre implication)

Code :

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public boolean isAllowed(String userName) {
 
        Session session = HibernateUtil.getCurrentSession();
 
        String SQL_QUERY = "SELECT t_intervenant.idIntervenant, t_intervenant.libIntervenant FROM T_Intervenant ";
        SQL_QUERY += "t_intervenant WHERE t_intervenant.idIntervenant='"
                + userName + "'";
 
        Query query = session.createQuery(SQL_QUERY);
        for (Iterator it = query.iterate(); it.hasNext();) {
            Object[] row = (Object[]) it.next();
            if (((String) row[0]).toUpperCase().equals(userName.toUpperCase())) {
                Utils.Syso(Utils.getCurrentTime() + " : " + (String) row[1]
                        + " signed in !");
                return true;
            }
        }
        session.flush();
        session.clear();
 
        return false;
    }

**Gardyen** · 28/02/2007, 11h04

tu ne devrais pas utiliser session.createSQLQuery() plutot ?

**n@n¤u** · 28/02/2007, 11h28

Oui, mais je ne sais pas quelle est la différence entre elles...

**willoi** · 28/02/2007, 11h40

createSQLQuery pour ecrire des requetes en sql
createQuery pour ecrire en hql

**OButterlin** · 28/02/2007, 11h48

Quand tu utilises Query, la syntaxe est
Query query = session.createQuery("from leNomDeMappingDeLaTable where ...");
Tu récupères un (ou une liste) d'objets (pojo)

Quand tu utilises SQLQuery, c'est du SQL natif, dans le genre "select * from nom_physique_de_table where ...".
Perso, si déjà, je préfère passer par un PreparedStatement et un bon vieux ResultSet en retour, dans le genre :

Code :

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PreparedStatement pstmt = session.connection().prepareStatement("select colonne1, colonne2 from table where cle=?");
pstmt.setString(1, "la valeur");
ResultSet rs = pstmt.executeQuery();
while ( rs.next() )
{
   ...
   String c1 = rs.getString("colonne1");
   ...
}

**n@n¤u** · 28/02/2007, 19h33

Ok, je fais les modifs nécessaires et je vous tiens au courant.

Par contre, j'ai une petite question : c'est quoi un pool de connexion, à quoi ça sert et est-ce je peux l'utiliser ?

Merci pour vos infos.

**OButterlin** · 01/03/2007, 09h27

Un pool de connexions est une sorte de réservoire de connexions.
Plutôt que de créer une connexion à chaque fois, tu "demandes" une connexion au pool.

Avantages (pour ceux qui me viennent à l'esprit) :
- les connexions sont pré-existantes (donc plus rapide)
- tu as généralement un outil (au niveau des serveur d'application) qui permet de gérer le pool
- tu peux fixer un timeout sur une connexion ou sur l'acquisition d'une connexion
- tu as une sorte d'abstraction entre hibernate et la base de données (tu fais tes développements avec une base, et tu déploies sur un serveur qui en utilise une autre sans changements)

Pour l'utiliser, il faut modifier le fichier de configuration d'hibernate (à la place de ta définition actuelle des paramètres de connexion) et définir sur ton serveur une source de données

Pour une application qui sollicite beaucoup la base de données, c'est mieux.
Maintenant, si ton application ne fais que quelques accès, c'est discutable... (mais qui peut le plus peut le moins

)

A+

**n@n¤u** · 01/03/2007, 12h56

Ok, j'ai bien compris :-)
Par contre, quand j'essaie de mettre le code suivant, j'ai une erreur

Code :

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public boolean isAllowed(String userName) {

		Session session = HibernateUtil.getCurrentSession();
		String SQL_QUERY = " FROM T_Intervenant t_i WHERE t_i.idIntervenant="
				+ userName;
		Iterator iter = session.createQuery(SQL_QUERY).iterate();

		String intervenantName = ((T_Intervenant) iter.next())
				.getLibIntervenant();
		if (intervenantName != null) {
			Utils.Syso(Utils.getCurrentTime() + " : " + intervenantName
					+ " signed in !");
			return true;
		}

		session.flush();
		session.clear();

		return false;
	}

L'erreur est la suivante.
Pour info, rbvp8995 est la valeur de userName.

Code :

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org.hibernate.exception.SQLGrammarException: could not execute query using iterate
        at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:67)
        at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:43)
        at org.hibernate.loader.hql.QueryLoader.iterate(QueryLoader.java:420)
        at org.hibernate.hql.ast.QueryTranslatorImpl.iterate(QueryTranslatorImpl.java:318)
        at org.hibernate.engine.query.HQLQueryPlan.performIterate(HQLQueryPlan.java:177)
        at org.hibernate.impl.SessionImpl.iterate(SessionImpl.java:1156)
        at org.hibernate.impl.QueryImpl.iterate(QueryImpl.java:46)
        at utils.LogIn.isAllowed(Unknown Source)
        at utils.LogIn.execute(Unknown Source)
        at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:419)
        at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:224)
        at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
        at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:432)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:763)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:585)
        at org.apache.catalina.security.SecurityUtil$1.run(SecurityUtil.java:243)
        at java.security.AccessController.doPrivileged(Native Method)
        at javax.security.auth.Subject.doAsPrivileged(Subject.java:517)
        at org.apache.catalina.security.SecurityUtil.execute(SecurityUtil.java:275)
        at org.apache.catalina.security.SecurityUtil.doAsPrivilege(SecurityUtil.java:161)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:245)
        at org.apache.catalina.core.ApplicationFilterChain.access$000(ApplicationFilterChain.java:50)
        at org.apache.catalina.core.ApplicationFilterChain$1.run(ApplicationFilterChain.java:156)
        at java.security.AccessController.doPrivileged(Native Method)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:152)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
        at org.objectweb.jonas.web.catalina55.ResetAuthenticationValve.invoke(ResetAuthenticationValve.java:62)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
        at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
        at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:667)
        at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
        at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)
        at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
        at java.lang.Thread.run(Thread.java:595)
Caused by: java.sql.SQLException: Unknown column 'rbvp8995' in 'where clause'
        at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:2928)
        at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1571)
        at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1666)
        at com.mysql.jdbc.Connection.execSQL(Connection.java:2994)
        at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:936)
        at com.mysql.jdbc.PreparedStatement.executeQuery(PreparedStatement.java:1030)
        at org.hibernate.jdbc.AbstractBatcher.getResultSet(AbstractBatcher.java:139)
        at org.hibernate.loader.Loader.getResultSet(Loader.java:1669)
        at org.hibernate.loader.hql.QueryLoader.iterate(QueryLoader.java:397)
        ... 39 more

Sauriez-vous me dire où est l'erreur ?
Merci

**OButterlin** · 01/03/2007, 13h03

2 choses :
- il faut utiliser un createSQLQuery
- ton paramètre est un String donc dans la requête entre '..'

Attention avec les String. Si tu as une apostrophe à l'intérieur de la chaîne, elle doit être doublée (d'où l'avantage du preparedStatement où tu ne t'en préoccupes pas)

**n@n¤u** · 02/03/2007, 10h37

OK, mais est-ce que ceci peut justifier les erreurs :

Code :

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** BEGIN NESTED EXCEPTION **
 
com.mysql.jdbc.CommunicationsException
MESSAGE: Communications link failure due to underlying exception:
 
** BEGIN NESTED EXCEPTION **
 
java.net.SocketException
MESSAGE: Software caused connection abort: socket write error
 
STACKTRACE:
 
java.net.SocketException: Software caused connection abort: socket write error

**OButterlin** · 02/03/2007, 11h11

Non, à priori, ça viendrait plutôt d'un problème sur le serveur DB ou d'une rupture entre la connexion et la DB.
Dans le genre, tu instancies une connexion et tu coupes la DB pendant l'utilisation, ça fera une erreur de ce type

A+

**n@n¤u** · 02/03/2007, 11h35

Le problème c'est que cette erreur survient de temps en temps, et en plus, je ne fais aucune manip sur la base....
C'est bizarre quand même.

**OButterlin** · 02/03/2007, 12h01

Tu libères bien la session après usage ?
Au fait, pourquoi hibernate.hbm2ddl.auto=update ?

**n@n¤u** · 02/03/2007, 12h52

C'est ce que j'ai trouvé dans un tuto d'Hibernate.
Ca sert à quoi précisemment ? Tu penses que ça viendrait de là ?

**OButterlin** · 02/03/2007, 13h37

Je ne pense pas...

La doc hibernate dit :
"L'option hbm2ddl.auto active la génération automatique des schémas de base de données - directement dans la base de données."

Perso, je ne l'utilise pas...

Tu as peut-être un problème de réseau, qui sait... Il y a tellement de causes possibles pour "flinguer" une connexion (réseau, serveur, driver pourrit etc...)
Je pense qu'il vaut mieux ne pas perdre trop de temps la dessus, du moment que ça n'arrive pas trop souvent...

Pour le reste, tu as réglé ton problème ?

**n@n¤u** · 08/03/2007, 10h15

Je reviens vers vous car j'ai toujours la même erreur :

Code :

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Last packet sent to the server was 0 ms ago.
 
STACKTRACE:
 
com.mysql.jdbc.CommunicationsException: Communications link failure due to underlying exception:
 
** BEGIN NESTED EXCEPTION **
 
java.net.SocketException
MESSAGE: Software caused connection abort: socket write error
 
STACKTRACE:
 
java.net.SocketException: Software caused connection abort: socket write error
        at java.net.SocketOutputStream.socketWrite0(Native Method)
        at java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:92)
        at java.net.SocketOutputStream.write(SocketOutputStream.java:136)
        at java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:65)
        at java.io.BufferedOutputStream.flush(BufferedOutputStream.java:123)
        at com.mysql.jdbc.MysqlIO.send(MysqlIO.java:2692)
        at com.mysql.jdbc.MysqlIO.send(MysqlIO.java:2621)
        at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1552)
        at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1666)
        at com.mysql.jdbc.Connection.execSQL(Connection.java:2994)
        at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:936)
        at com.mysql.jdbc.PreparedStatement.executeQuery(PreparedStatement.java:1030)
        at org.hibernate.jdbc.AbstractBatcher.getResultSet(AbstractBatcher.java:139)
        at org.hibernate.loader.Loader.getResultSet(Loader.java:1669)
        at org.hibernate.loader.Loader.doQuery(Loader.java:662)
        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.criteria.CriteriaLoader.list(CriteriaLoader.java:94)
        at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1533)
        at org.hibernate.impl.CriteriaImpl.list(CriteriaImpl.java:283)
        at utils.LogIn.isAllowed(Unknown Source)
        at utils.LogIn.execute(Unknown Source)
        at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:419)
        at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:224)
        at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
        at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:432)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:763)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
        at sun.reflect.GeneratedMethodAccessor75.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:585)
        at org.apache.catalina.security.SecurityUtil$1.run(SecurityUtil.java:243)
        at java.security.AccessController.doPrivileged(Native Method)
        at javax.security.auth.Subject.doAsPrivileged(Subject.java:517)
        at org.apache.catalina.security.SecurityUtil.execute(SecurityUtil.java:275)
        at org.apache.catalina.security.SecurityUtil.doAsPrivilege(SecurityUtil.java:161)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:245)
        at org.apache.catalina.core.ApplicationFilterChain.access$000(ApplicationFilterChain.java:50)
        at org.apache.catalina.core.ApplicationFilterChain$1.run(ApplicationFilterChain.java:156)
        at java.security.AccessController.doPrivileged(Native Method)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:152)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
        at org.objectweb.jonas.web.catalina55.ResetAuthenticationValve.invoke(ResetAuthenticationValve.java:62)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
        at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
        at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:667)
        at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
        at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)
        at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
        at java.lang.Thread.run(Thread.java:595)
 
 
** END NESTED EXCEPTION **
 
 
 
Last packet sent to the server was 0 ms ago.
        at com.mysql.jdbc.MysqlIO.send(MysqlIO.java:2710)
        at com.mysql.jdbc.MysqlIO.send(MysqlIO.java:2621)
        at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1552)
        at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1666)
        at com.mysql.jdbc.Connection.execSQL(Connection.java:2994)
        at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:936)
        at com.mysql.jdbc.PreparedStatement.executeQuery(PreparedStatement.java:1030)
        at org.hibernate.jdbc.AbstractBatcher.getResultSet(AbstractBatcher.java:139)
        at org.hibernate.loader.Loader.getResultSet(Loader.java:1669)
        at org.hibernate.loader.Loader.doQuery(Loader.java:662)
        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.criteria.CriteriaLoader.list(CriteriaLoader.java:94)
        at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1533)
        at org.hibernate.impl.CriteriaImpl.list(CriteriaImpl.java:283)
        at utils.LogIn.isAllowed(Unknown Source)
        at utils.LogIn.execute(Unknown Source)
        at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:419)
        at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:224)
        at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
        at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:432)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:763)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
        at sun.reflect.GeneratedMethodAccessor75.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:585)
        at org.apache.catalina.security.SecurityUtil$1.run(SecurityUtil.java:243)
        at java.security.AccessController.doPrivileged(Native Method)
        at javax.security.auth.Subject.doAsPrivileged(Subject.java:517)
        at org.apache.catalina.security.SecurityUtil.execute(SecurityUtil.java:275)
        at org.apache.catalina.security.SecurityUtil.doAsPrivilege(SecurityUtil.java:161)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:245)
        at org.apache.catalina.core.ApplicationFilterChain.access$000(ApplicationFilterChain.java:50)
        at org.apache.catalina.core.ApplicationFilterChain$1.run(ApplicationFilterChain.java:156)
        at java.security.AccessController.doPrivileged(Native Method)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:152)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
        at org.objectweb.jonas.web.catalina55.ResetAuthenticationValve.invoke(ResetAuthenticationValve.java:62)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
        at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
        at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:667)
        at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
        at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)
        at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
        at java.lang.Thread.run(Thread.java:595)
 
 
** END NESTED EXCEPTION **
 
 
        at com.mysql.jdbc.Connection.checkClosed(Connection.java:1842)
        at com.mysql.jdbc.Connection.prepareStatement(Connection.java:4260)
        at com.mysql.jdbc.Connection.prepareStatement(Connection.java:4226)
        at org.hibernate.jdbc.AbstractBatcher.getPreparedStatement(AbstractBatcher.java:442)
        at org.hibernate.jdbc.AbstractBatcher.getPreparedStatement(AbstractBatcher.java:368)
        at org.hibernate.jdbc.AbstractBatcher.prepareQueryStatement(AbstractBatcher.java:105)
        at org.hibernate.loader.Loader.prepareQueryStatement(Loader.java:1561)
        at org.hibernate.loader.Loader.doQuery(Loader.java:661)
        at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:224)
        at org.hibernate.loader.Loader.doList(Loader.java:2145)
        ... 39 more

Et le code est le suivant :

Code :

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public boolean isAllowed(String userName) {
 
		Session session = HibernateUtil.getCurrentSession();
		Criteria crit = session.createCriteria(T_Intervenant.class);
		crit.add(Expression.eq("idIntervenant", userName));
		Iterator it = (crit.list()).iterator();
 
		while (it.hasNext()) {
			T_Intervenant intervenant = (T_Intervenant) it.next();
			String intervenantName = intervenant.getLibIntervenant();
			if (intervenantName != null) {
				Utils.Syso(Utils.getCurrentTime() + " : " + intervenantName
						+ " signed in !");
				return true;
			}
		}
		session.flush();
		session.clear();
		return false;
	}

Si le problème vient de ma bdd, comment est-ce que je peux l'identifier.
(pour info : c'est une MySQL5).

Erreur "JDBC Connection Exception"

JDBC Java

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