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gabby
 Post subject: C3P0 exception.... very strange!!!!
PostPosted: Tue Nov 29, 2005 7:41 pm 
Beginner
Beginner

Joined: Fri Aug 20, 2004 3:45 pm
Posts: 22
Location: Florence - ITALY
I obtain the exception below after 5 reload of the same web page.
This error happens ONLY with hibernate 3.1RC3.. NOT with hibernate3.1RC2.
In spring DAO access forum, suggest me to ask in hibernate forum.
Possible bug?

Thanks.
Gianni


Hibernate version: 3.1RC3

Mapping documents:
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close">
<property name="driverClass" value="com.mysql.jdbc.Driver"/>
<property name="jdbcUrl" value="jdbc:mysql://localhost:3306/anagrafe"/>
<property name="user" value="root"/>
<property name="password" value=""/>
<property name="acquireRetryAttempts" value="30" />
</bean>

Full stack trace of any exception that occurs:
Hibernate: select ente0_.id_ente as id1_2_, ente0_.descr_ente as descr2_2_, ente0_.codiceistatcomune as codiceis3_2_, ente0_.data_agg_zindice as data4_2_ from enti ente0_
- Theme created: name 'theme', basename [theme]
- Using Jakarta JSTL ExpressionEvaluatorManager
Hibernate: select ente0_.id_ente as id1_2_, ente0_.descr_ente as descr2_2_, ente0_.codiceistatcomune as codiceis3_2_, ente0_.data_agg_zindice as data4_2_ from enti ente0_
Hibernate: select ente0_.id_ente as id1_2_, ente0_.descr_ente as descr2_2_, ente0_.codiceistatcomune as codiceis3_2_, ente0_.data_agg_zindice as data4_2_ from enti ente0_
Hibernate: select ente0_.id_ente as id1_2_, ente0_.descr_ente as descr2_2_, ente0_.codiceistatcomune as codiceis3_2_, ente0_.data_agg_zindice as data4_2_ from enti ente0_
Hibernate: select ente0_.id_ente as id1_2_, ente0_.descr_ente as descr2_2_, ente0_.codiceistatcomune as codiceis3_2_, ente0_.data_agg_zindice as data4_2_ from enti ente0_
- SQL Error: 0, SQLState: null
- SQL Error: 0, SQLState: null
- An attempt by a client to checkout a Connection has timed out.
- An attempt by a client to checkout a Connection has timed out.
- SQL Error: 0, SQLState: null
- SQL Error: 0, SQLState: null
- An attempt by a client to checkout a Connection has timed out.
- An attempt by a client to checkout a Connection has timed out.
- Could not complete request
org.springframework.transaction.CannotCreateTransactionException: Could not open Hibernate Session for transaction; nested exception is org.hibernate.exception.GenericJDBCException: Cannot open user connection
org.hibernate.exception.GenericJDBCException: Cannot open user connection
at org.hibernate.exception.SQLStateConverter.handledNonSpecificException(SQLStateConverter.java:91)
at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:79)
at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:43)
at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:29)
at org.hibernate.jdbc.JDBCContext.userConnection(JDBCContext.java:117)
at org.hibernate.impl.SessionImpl.connection(SessionImpl.java:364)
at org.springframework.orm.hibernate3.HibernateTransactionManager.doBegin(HibernateTransactionManager.java:407)
at org.springframework.transaction.support.AbstractPlatformTransactionManager.getTransaction(AbstractPlatformTransactionManager.java:281)
at org.springframework.transaction.interceptor.TransactionAspectSupport.createTransactionIfNecessary(TransactionAspectSupport.java:217)
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:89)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:144)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:174)
at $Proxy1.getEnti(Unknown Source)
at it.tdgroup.anagrafe.actions.SalvaEnteController.referenceData(SalvaEnteController.java:46)
at org.springframework.web.servlet.mvc.SimpleFormController.referenceData(SimpleFormController.java:209)
at org.springframework.web.servlet.mvc.AbstractFormController.showForm(AbstractFormController.java:538)
at org.springframework.web.servlet.mvc.SimpleFormController.showForm(SimpleFormController.java:193)
at org.springframework.web.servlet.mvc.SimpleFormController.showForm(SimpleFormController.java:172)
at org.springframework.web.servlet.mvc.AbstractFormController.showNewForm(AbstractFormController.java:321)
at org.springframework.web.servlet.mvc.AbstractFormController.handleRequestInternal(AbstractFormController.java:261)
at org.springframework.web.servlet.mvc.AbstractController.handleRequest(AbstractController.java:139)
at org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:44)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:684)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:625)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:392)
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:347)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:696)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:809)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:200)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:146)
at com.opensymphony.module.sitemesh.filter.PageFilter.parsePage(PageFilter.java:118)
at com.opensymphony.module.sitemesh.filter.PageFilter.doFilter(PageFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:166)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:146)
at it.tdgroup.anagrafe.authentication.AccessControlFilter.doFilter(AccessControlFilter.java:47)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:166)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:146)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:209)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:596)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:433)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:948)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:144)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:596)
at org.apache.catalina.valves.CertificatesValve.invoke(CertificatesValve.java:199)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:594)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:433)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:948)
at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2358)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:133)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:596)
at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:118)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:594)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:116)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:594)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:433)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:948)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:127)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:596)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:433)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:948)
at org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:152)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:799)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:705)
at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:577)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:683)
at java.lang.Thread.run(Thread.java:595)
Caused by: java.sql.SQLException: An attempt by a client to checkout a Connection has timed out.
at com.mchange.v2.sql.SqlUtils.toSQLException(SqlUtils.java:104)
at com.mchange.v2.sql.SqlUtils.toSQLException(SqlUtils.java:65)
at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutPooledConnection(C3P0PooledConnectionPool.java:234)
at com.mchange.v2.c3p0.PoolBackedDataSource.getConnection(PoolBackedDataSource.java:94)
at com.mchange.v2.c3p0.ComboPooledDataSource.getConnection(ComboPooledDataSource.java:521)
at org.springframework.orm.hibernate3.LocalDataSourceConnectionProvider.getConnection(LocalDataSourceConnectionProvider.java:80)
at org.hibernate.jdbc.JDBCContext.userConnection(JDBCContext.java:114)
... 61 more
Caused by: com.mchange.v2.resourcepool.TimeoutException: internal -- timeout at awaitAcquire()
at com.mchange.v2.resourcepool.BasicResourcePool.awaitAcquire(BasicResourcePool.java:968)
at com.mchange.v2.resourcepool.BasicResourcePool.checkoutResource(BasicResourcePool.java:208)
at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutPooledConnection(C3P0PooledConnectionPool.java:232)
... 65 more
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pmularien
 Post subject:
PostPosted: Tue Nov 29, 2005 9:30 pm 
Senior
Senior

Joined: Mon Apr 04, 2005 8:04 am
Posts: 128
Location: Manchester, NH USA
Your code where you are opening and closing the connection?

I'd guess you are running out of connections in the pool because you are not closing them somehow.
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gabby
 Post subject:
PostPosted: Wed Nov 30, 2005 4:01 am 
Beginner
Beginner

Joined: Fri Aug 20, 2004 3:45 pm
Posts: 22
Location: Florence - ITALY
Spring should close connection for me using method destroy-method="close"
as you can see in bean definitions.

Gianni
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gabby
 Post subject:
PostPosted: Wed Nov 30, 2005 4:03 am 
Beginner
Beginner

Joined: Fri Aug 20, 2004 3:45 pm
Posts: 22
Location: Florence - ITALY
Remenber.... my code works fine with Hibernate 3.1RC2 !!!!!

Gianni
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pmularien
 Post subject:
PostPosted: Thu Dec 01, 2005 4:34 pm 
Senior
Senior

Joined: Mon Apr 04, 2005 8:04 am
Posts: 128
Location: Manchester, NH USA
I have been recently getting this error too. What version of C3P0 are you using? I am using 0.9.2 with Hibernate 3.1 mainline (rc3+).
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gabby
 Post subject:
PostPosted: Thu Dec 01, 2005 4:53 pm 
Beginner
Beginner

Joined: Fri Aug 20, 2004 3:45 pm
Posts: 22
Location: Florence - ITALY
I'm using C3P0 version 0.9.0, tha same included in Hibernate 3.1RC3.
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