DataBase Problem - Mailing list pgsql-general

I am having problem as :

Caused by: org.springframework.transaction.TransactionSystemException: Could not roll back Hibernate transaction; nested exception is org.hibernate.TransactionException: JDBC rollback failed

      at org.springframework.orm.hibernate3.HibernateTransactionManager.doRollback(HibernateTransactionManager.java:677)

      at org.springframework.transaction.support.AbstractPlatformTransactionManager.doRollbackOnCommitException(AbstractPlatformTransactionManager.java:850)

      at org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit(AbstractPlatformTransactionManager.java:737)

      at org.springframework.transaction.support.AbstractPlatformTransactionManager.commit(AbstractPlatformTransactionManager.java:678)

      at org.springframework.transaction.interceptor.TransactionAspectSupport.commitTransactionAfterReturning(TransactionAspectSupport.java:321)

      at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:116)

      at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)

      at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)

      at $Proxy57.generateReport(Unknown Source)

      ... 106 more

Caused by: org.hibernate.TransactionException: JDBC rollback failed

      at org.hibernate.transaction.JDBCTransaction.rollback(JDBCTransaction.java:204)

      at org.springframework.orm.hibernate3.HibernateTransactionManager.doRollback(HibernateTransactionManager.java:674)

      ... 114 more

Caused by: java.sql.SQLException: Couldn't perform the operation rollback: You can't perform any operations on this connection. It has been automatically closed by Proxool for some reason (see logs).

      at org.logicalcobwebs.proxool.WrappedConnection.invoke(WrappedConnection.java:207)

      at org.logicalcobwebs.proxool.WrappedConnection.intercept(WrappedConnection.java:87)

      at org.postgresql.PGConnection$$EnhancerByProxool$$4e6ef3b1.rollback(<generated>)

      at org.hibernate.transaction.JDBCTransaction.rollbackAndResetAutoCommit(JDBCTransaction.java:217)

      at org.hibernate.transaction.JDBCTransaction.rollback(JDBCTransaction.java:196)

      ... 115 more

Pls guide me.Thanks you.