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Author Message
AlienQueen
 Post subject: CannotAcquireResourceException (once more)
PostPosted: Mon Dec 04, 2006 7:12 pm 
Newbie

Joined: Mon Dec 04, 2006 5:45 pm
Posts: 4
Location: Bordeaux, France
Hello all !

I'm using Hibernate 3.2 / Struts 1.2.9 / Eclipse 3.2 and MySQL 5.0.18.16

I'm working on a Tomcat 5.5 webapp. Lauching and using it works fine except after some times Hibernate throws a

CannotAcquireResourceException : com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask@11d3ec8 -- Acquisition Attempt Failed!!! Clearing pending acquires. While trying to acquire a needed new resource, we failed to succeed more than the maximum number of allowed acquisition attempts (30).


Here's my hibernate.cfg.xml

Code:
<?xml version="1.0"?>

<!DOCTYPE hibernate-configuration PUBLIC
   "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
   "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">

<hibernate-configuration>

   <session-factory>
      <!-- local connection properties -->
      <property name="hibernate.connection.url">
         jdbc:mysql://localhost:3306/travis
      </property>
      <property name="hibernate.connection.driver_class">
         com.mysql.jdbc.Driver
      </property>
      <property name="hibernate.connection.username">zap</property>
      <property name="hibernate.connection.password">zap</property>
      <property name="dialect">
         org.hibernate.dialect.MySQLDialect
      </property>



        <!-- Use the C3P0 connection pool. -->
      <property name="c3p0.min_size">5</property>
        <property name="c3p0.max_size">50</property>
        <property name="c3p0.timeout">5000</property>
        <property name="c3p0.max_statements">400</property>
        <property name="c3p0.idle_test_period">1800</property>
        <property name="c3p0.maxAdministrativeTaskTime">5000</property>
        <property name="c3p0.breakAfterAcquireFailure">false</property>

        <property name="transaction.factory_class">org.hibernate.transaction.JDBCTransactionFactory</property>

        <!-- Disable second-level cache.  -->
        <property name="cache.provider_class">org.hibernate.cache.NoCacheProvider</property>
        <property name="cache.use_query_cache">false</property>
        <property name="cache.use_minimal_puts">false</property>
        <property name="max_fetch_depth">3</property>

        <!-- Print SQL to stdout. -->
        <property name="show_sql">true</property>
        <property name="format_sql">true</property>

        <!-- Bind the getCurrentSession() method to the thread. -->
        <property name="current_session_context_class">thread</property>


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



It is inspired from this document :

Hibernate tuto




Now, here's the Full stack trace of any exception that occurs:

Code:
WARN  [BasicResourcePool] com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask@5966f -- Acquisition Attempt Failed!!! Clearing pending acquires. While trying to acquire a needed new resource, we failed to succeed more than the maximum number of allowed acquisition attempts (30).
12-04 23:30:07 WARN  [SettingsFactory] Could not obtain connection metadata
java.sql.SQLException: Connections could not be acquired from the underlying database!
   at com.mchange.v2.sql.SqlUtils.toSQLException(SqlUtils.java:104)
   at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutPooledConnection(C3P0PooledConnectionPool.java:236)
   at com.mchange.v2.c3p0.PoolBackedDataSource.getConnection(PoolBackedDataSource.java:94)
   at org.hibernate.connection.C3P0ConnectionProvider.getConnection(C3P0ConnectionProvider.java:35)
   at org.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:76)
   at org.hibernate.cfg.Configuration.buildSettings(Configuration.java:2006)
   at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1289)
   at asp.consignes.base._BaseRootDAO.initialize(_BaseRootDAO.java:101)
   at asp.consignes.base._BaseRootDAO.initialize(_BaseRootDAO.java:88)
   at asp.consignes.base._BaseRootDAO.initialize(_BaseRootDAO.java:79)
   at asp.consignes.InitActionConsignesFormulaire.execute(InitActionConsignesFormulaire.java:45)
   at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:431)
   at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:236)
   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:709)
   at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
   at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
   at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:672)
   at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:463)
   at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:398)
   at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:301)
   at org.apache.struts.action.RequestProcessor.doForward(RequestProcessor.java:1085)
   at org.apache.struts.action.RequestProcessor.processForwardConfig(RequestProcessor.java:398)
   at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:241)
   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:709)
   at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
   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.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:664)
   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$ControlRunnable.run(ThreadPool.java:684)
   at java.lang.Thread.run(Thread.java:595)
Caused by: com.mchange.v2.resourcepool.CannotAcquireResourceException: A ResourcePool could not acquire a resource from its primary factory or source.
   at com.mchange.v2.resourcepool.BasicResourcePool.awaitAcquire(BasicResourcePool.java:970)
   at com.mchange.v2.resourcepool.BasicResourcePool.checkoutResource(BasicResourcePool.java:208)
   at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutPooledConnection(C3P0PooledConnectionPool.java:232)
   ... 42 more
12-04 23:30:08 WARN  [BasicResourcePool] com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask@15f1ace -- Acquisition Attempt Failed!!! Clearing pending acquires. While trying to acquire a needed new resource, we failed to succeed more than the maximum number of allowed acquisition attempts (30).
12-04 23:30:08 WARN  [BasicResourcePool] com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask@4173b9 -- Acquisition Attempt Failed!!! Clearing pending acquires. While trying to acquire a needed new resource, we failed to succeed more than the maximum number of allowed acquisition attempts (30).
12-04 23:30:08 WARN  [BasicResourcePool] com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask@760838 -- Acquisition Attempt Failed!!! Clearing pending acquires. While trying to acquire a needed new resource, we failed to succeed more than the maximum number of allowed acquisition attempts (30).
12-04 23:30:38 WARN  [BasicResourcePool] com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask@11d3ec8 -- Acquisition Attempt Failed!!! Clearing pending acquires. While trying to acquire a needed new resource, we failed to succeed more than the maximum number of allowed acquisition attempts (30).
12-04 23:30:38 WARN  [JDBCExceptionReporter] SQL Error: 0, SQLState: null
12-04 23:30:38 ERROR [JDBCExceptionReporter] Connections could not be acquired from the underlying database!
12-04 23:30:38 WARN  [RequestProcessor] Unhandled Exception thrown: class org.hibernate.exception.GenericJDBCException
12-04 23:30:38 ERROR [[travis]] "Servlet.service()" pour la servlet travis a lancé une exception
org.hibernate.exception.GenericJDBCException: Cannot open connection
   at org.hibernate.exception.SQLStateConverter.handledNonSpecificException(SQLStateConverter.java:103)
   at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:91)
   at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:43)
   at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:29)
   at org.hibernate.jdbc.ConnectionManager.openConnection(ConnectionManager.java:420)
   at org.hibernate.jdbc.ConnectionManager.getConnection(ConnectionManager.java:144)
   at org.hibernate.jdbc.AbstractBatcher.prepareQueryStatement(AbstractBatcher.java:139)
   at org.hibernate.loader.Loader.prepareQueryStatement(Loader.java:1538)
   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:2211)
   at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2095)
   at org.hibernate.loader.Loader.list(Loader.java:2090)
   at org.hibernate.loader.criteria.CriteriaLoader.list(CriteriaLoader.java:95)
   at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1569)
   at org.hibernate.impl.CriteriaImpl.list(CriteriaImpl.java:283)
   at asp.consignes.base._BaseRootDAO.findAll(_BaseRootDAO.java:298)
   at asp.consignes.base.BaseConsigneBeanDAO.findAll(BaseConsigneBeanDAO.java:98)
   at asp.consignes.base._BaseRootDAO.findAll(_BaseRootDAO.java:273)
   at asp.consignes.base._BaseRootDAO.findAll(_BaseRootDAO.java:260)
   at asp.consignes.base.BaseConsigneBeanDAO.findAll(BaseConsigneBeanDAO.java:82)
   at asp.consignes.InitActionConsignesFormulaire.execute(InitActionConsignesFormulaire.java:47)
   at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:431)
   at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:236)
   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:709)
   at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
   at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
   at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:672)
   at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:463)
   at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:398)
   at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:301)
   at org.apache.struts.action.RequestProcessor.doForward(RequestProcessor.java:1085)
   at org.apache.struts.action.RequestProcessor.processForwardConfig(RequestProcessor.java:398)
   at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:241)
   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:709)
   at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
   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.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:664)
   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: Connections could not be acquired from the underlying database!
   at com.mchange.v2.sql.SqlUtils.toSQLException(SqlUtils.java:104)
   at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutPooledConnection(C3P0PooledConnectionPool.java:236)
   at com.mchange.v2.c3p0.PoolBackedDataSource.getConnection(PoolBackedDataSource.java:94)
   at org.hibernate.connection.C3P0ConnectionProvider.getConnection(C3P0ConnectionProvider.java:35)
   at org.hibernate.jdbc.ConnectionManager.openConnection(ConnectionManager.java:417)
   ... 50 more
Caused by: com.mchange.v2.resourcepool.CannotAcquireResourceException: A ResourcePool could not acquire a resource from its primary factory or source.
   at com.mchange.v2.resourcepool.BasicResourcePool.awaitAcquire(BasicResourcePool.java:970)
   at com.mchange.v2.resourcepool.BasicResourcePool.checkoutResource(BasicResourcePool.java:208)
   at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutPooledConnection(C3P0PooledConnectionPool.java:232)
   ... 53 more
12-04 23:30:38 ERROR [[travis]] "Servlet.service()" pour la servlet travis a généré une exception
org.hibernate.exception.GenericJDBCException: Cannot open connection
   at org.hibernate.exception.SQLStateConverter.handledNonSpecificException(SQLStateConverter.java:103)
   at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:91)
   at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:43)
   at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:29)
   at org.hibernate.jdbc.ConnectionManager.openConnection(ConnectionManager.java:420)
   at org.hibernate.jdbc.ConnectionManager.getConnection(ConnectionManager.java:144)
   at org.hibernate.jdbc.AbstractBatcher.prepareQueryStatement(AbstractBatcher.java:139)
   at org.hibernate.loader.Loader.prepareQueryStatement(Loader.java:1538)
   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:2211)
   at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2095)
   at org.hibernate.loader.Loader.list(Loader.java:2090)
   at org.hibernate.loader.criteria.CriteriaLoader.list(CriteriaLoader.java:95)
   at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1569)
   at org.hibernate.impl.CriteriaImpl.list(CriteriaImpl.java:283)
   at asp.consignes.base._BaseRootDAO.findAll(_BaseRootDAO.java:298)
   at asp.consignes.base.BaseConsigneBeanDAO.findAll(BaseConsigneBeanDAO.java:98)
   at asp.consignes.base._BaseRootDAO.findAll(_BaseRootDAO.java:273)
   at asp.consignes.base._BaseRootDAO.findAll(_BaseRootDAO.java:260)
   at asp.consignes.base.BaseConsigneBeanDAO.findAll(BaseConsigneBeanDAO.java:82)
   at asp.consignes.InitActionConsignesFormulaire.execute(InitActionConsignesFormulaire.java:47)
   at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:431)
   at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:236)
   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:709)
   at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
   at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
   at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:672)
   at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:463)
   at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:398)
   at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:301)
   at org.apache.struts.action.RequestProcessor.doForward(RequestProcessor.java:1085)
   at org.apache.struts.action.RequestProcessor.processForwardConfig(RequestProcessor.java:398)
   at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:241)
   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:709)
   at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
   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.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:664)
   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: Connections could not be acquired from the underlying database!
   at com.mchange.v2.sql.SqlUtils.toSQLException(SqlUtils.java:104)
   at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutPooledConnection(C3P0PooledConnectionPool.java:236)
   at com.mchange.v2.c3p0.PoolBackedDataSource.getConnection(PoolBackedDataSource.java:94)
   at org.hibernate.connection.C3P0ConnectionProvider.getConnection(C3P0ConnectionProvider.java:35)
   at org.hibernate.jdbc.ConnectionManager.openConnection(ConnectionManager.java:417)
   ... 50 more
Caused by: com.mchange.v2.resourcepool.CannotAcquireResourceException: A ResourcePool could not acquire a resource from its primary factory or source.
   at com.mchange.v2.resourcepool.BasicResourcePool.awaitAcquire(BasicResourcePool.java:970)
   at com.mchange.v2.resourcepool.BasicResourcePool.checkoutResource(BasicResourcePool.java:208)
   at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutPooledConnection(C3P0PooledConnectionPool.java:232)
   ... 53 more


I don't know exactly if it comes from Hiberntate or from MySQL, so if you want my MySQL config, just ask ! But I guess it all comes from my c3p0 (bad) configuration.

Regards,


Alien
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AlienQueen
 Post subject:
PostPosted: Tue Dec 05, 2006 1:26 am 
Newbie

Joined: Mon Dec 04, 2006 5:45 pm
Posts: 4
Location: Bordeaux, France
I've found this page talking about a bug in c3p0. I've applied the patch but no way... But I think the bug still applies to me because if I de-activate c3p0 in my config file, no more bug !

A comment, anyone ? Must I post something about my case in this bug report, or am I just a newbie who can't configure his pool just well ?
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 Profile  
 
swaldman
 Post subject:
PostPosted: Thu Dec 07, 2006 2:10 am 
C3P0 Developer
C3P0 Developer

Joined: Tue Jan 06, 2004 8:58 pm
Posts: 145
Hi,

Please try setting the log level of com.mchange.v2.resourcepool.BasicResourcePool to DEBUG (log4j) or FINER (jdk logging), and check out the particular Exception that is occuriing at the database level. It looks like this is being lost here in a long chain of stack traces.

Thanks!

Steve
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 Profile  
 
AlienQueen
 Post subject:
PostPosted: Fri Dec 08, 2006 11:02 am 
Newbie

Joined: Mon Dec 04, 2006 5:45 pm
Posts: 4
Location: Bordeaux, France
OK, I'll give it a try as soon as possible.

Thanx !
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