Have anyone run into this Hibernate connection exception?

[vw729]

A small Spring-Hibernate web application is frequently hung on a DB access. After I reload the application, I get the following exception on Hibernate openConnection method. Have anyone run into the same situation before? How to deal with it?

Thanks for your inputs in advance.

org.springframework.web.util.NestedServletException: Handler processing failed; nested exception is java.lang.ThreadDeath
	org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:846)
	org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:736)
	org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:396)
	org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:350)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
	...

root cause

java.lang.ThreadDeath
	org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1221)
	org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1181)
	java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
	org.hibernate.jdbc.ConnectionManager.openConnection(ConnectionManager.java:420)
	org.hibernate.jdbc.ConnectionManager.getConnection(ConnectionManager.java:144)
	org.hibernate.jdbc.JDBCContext.connection(JDBCContext.java:119)
	org.hibernate.transaction.JDBCTransaction.begin(JDBCTransaction.java:57)
	org.hibernate.impl.SessionImpl.beginTransaction(SessionImpl.java:1326)
	org.springframework.orm.hibernate3.HibernateTransactionManager.doBegin(HibernateTransactionManager.java:494)
	org.springframework.transaction.support.AbstractPlatformTransactionManager.getTransaction(AbstractPlatformTransactionManager.java:315)
	org.springframework.transaction.interceptor.TransactionAspectSupport.createTransactionIfNecessary(TransactionAspectSupport.java:257)
	org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:102)
	org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:185)
	org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:209)
.......

[vw729]

I run into the same situation again today. Although the exception message is different, the cause is the same. How to solve this problem?

description The server encountered an internal error () that prevented it from fulfilling this request.

exception

org.springframework.web.util.NestedServletException: Request processing failed; nested exception is org.springframework.transaction.CannotCreateTransactionException: Could not open Hibernate Session for transaction; nested exception is org.hibernate.exception.GenericJDBCException: Cannot open connection
	org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:408)
	org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:360)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:709)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
	......

root cause

org.springframework.transaction.CannotCreateTransactionException: Could not open Hibernate Session for transaction; nested exception is org.hibernate.exception.GenericJDBCException: Cannot open connection
	org.springframework.orm.hibernate3.HibernateTransactionManager.doBegin(HibernateTransactionManager.java:522)
	org.springframework.transaction.support.AbstractPlatformTransactionManager.getTransaction(AbstractPlatformTransactionManager.java:315)
	org.springframework.transaction.interceptor.TransactionAspectSupport.createTransactionIfNecessary(TransactionAspectSupport.java:257)
	org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:102)
	org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:185)
	org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:209)
	......
root cause

org.hibernate.exception.GenericJDBCException: Cannot open connection
	org.hibernate.exception.SQLStateConverter.handledNonSpecificException(SQLStateConverter.java:103)
	org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:91)
	org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:43)
	org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:29)
	org.hibernate.jdbc.ConnectionManager.openConnection(ConnectionManager.java:420)
	org.hibernate.jdbc.ConnectionManager.getConnection(ConnectionManager.java:144)
	org.hibernate.jdbc.JDBCContext.connection(JDBCContext.java:119)
	org.hibernate.transaction.JDBCTransaction.begin(JDBCTransaction.java:57)
	org.hibernate.impl.SessionImpl.beginTransaction(SessionImpl.java:1326)
	org.springframework.orm.hibernate3.HibernateTransactionManager.doBegin(HibernateTransactionManager.java:494)
	org.springframework.transaction.support.AbstractPlatformTransactionManager.getTransaction(AbstractPlatformTransactionManager.java:315)
	org.springframework.transaction.interceptor.TransactionAspectSupport.createTransactionIfNecessary(TransactionAspectSupport.java:257)
	org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:102)
	org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:185)
	org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:209)
	......