【发布时间】：2015-03-06 16:54:00
【问题描述】：
我有一个 JSF + Spring + Hibernate 应用程序。使用 c3p0 pool v.0.9.1 然后部署它，日志不断向我抛出 SQLWarnings，如下所示，不知道为什么。
c3po在spring上下文中的配置为：
<bean id="datasource" class="com.mchange.v2.c3p0.ComboPooledDataSource"
destroy-method="close">
<property name="driverClass" value="com.informix.jdbc.IfxDriver"/>
<property name="jdbcUrl"
value="${url}" />
<property name="user" value="${user}" />
<property name="password" value="${password}" />
<property name="initialPoolSize" value="1" />
<property name="maxPoolSize" value="20" />
<property name="idleConnectionTestPeriod" value="150" />
<property name="acquireIncrement" value="1" />
<property name="maxStatements" value="0" />
<property name="numHelperThreads" value="3" />
<property name="maxIdleTime" value="3600" />
</bean>
输出是：
INFO [com.mchange.v2.c3p0.SQLWarnings] La base de datos tiene transacciones
java.sql.SQLWarning: La base de datos tiene transacciones
at com.informix.util.IfxWarnMsg.getSQLWarning(IfxWarnMsg.java:125)
at com.informix.util.IfxWarnMsg.getSQLWarning(IfxWarnMsg.java:149)
at com.informix.jdbc.IfxSqliConnect.addWarning(IfxSqliConnect.java:1817)
at com.informix.jdbc.IfxSqliConnect.setWarnings(IfxSqliConnect.java:3935)
at com.informix.jdbc.IfxSqliConnect.OpenDbInit(IfxSqliConnect.java:2591)
at com.informix.jdbc.IfxSqliConnect.setDatabaseOpen(IfxSqliConnect.java:2465)
at com.informix.jdbc.IfxSqli.callsetDatabaseOpen(IfxSqli.java:2496)
at com.informix.jdbc.IfxSqli.executeOpenDatabase(IfxSqli.java:1712)
at com.informix.jdbc.IfxSqliConnect.<init>(IfxSqliConnect.java:1242)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:494)
at com.informix.jdbc.IfxDriver.connect(IfxDriver.java:243)
at com.mchange.v2.c3p0.DriverManagerDataSource.getConnection(DriverManagerDataSource.java:135)
at com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:182)
at com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:171)
at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool$1PooledConnectionResourcePoolManager.acquireResource(C3P0PooledConnectionPool.java:137)
at com.mchange.v2.resourcepool.BasicResourcePool.doAcquire(BasicResourcePool.java:1014)
at com.mchange.v2.resourcepool.BasicResourcePool.access$800(BasicResourcePool.java:32)
at com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask.run(BasicResourcePool.java:1810)
at com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:547)
2015-03-03 14:22:47,748 INFO [com.mchange.v2.c3p0.SQLWarnings] Seleccionada base de datos de Informix Dynamic Server 2000
java.sql.SQLWarning: Seleccionada base de datos de Informix Dynamic Server 2000
at com.informix.util.IfxWarnMsg.getSQLWarning(IfxWarnMsg.java:125)
at com.informix.util.IfxWarnMsg.getSQLWarning(IfxWarnMsg.java:149)
at com.informix.jdbc.IfxSqliConnect.addWarning(IfxSqliConnect.java:1817)
at com.informix.jdbc.IfxSqliConnect.setWarnings(IfxSqliConnect.java:3941)
at com.informix.jdbc.IfxSqliConnect.OpenDbInit(IfxSqliConnect.java:2591)
at com.informix.jdbc.IfxSqliConnect.setDatabaseOpen(IfxSqliConnect.java:2465)
at com.informix.jdbc.IfxSqli.callsetDatabaseOpen(IfxSqli.java:2496)
at com.informix.jdbc.IfxSqli.executeOpenDatabase(IfxSqli.java:1712)
at com.informix.jdbc.IfxSqliConnect.<init>(IfxSqliConnect.java:1242)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:494)
at com.informix.jdbc.IfxDriver.connect(IfxDriver.java:243)
at com.mchange.v2.c3p0.DriverManagerDataSource.getConnection(DriverManagerDataSource.java:135)
at com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:182)
at com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:171)
at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool$1PooledConnectionResourcePoolManager.acquireResource(C3P0PooledConnectionPool.java:137)
at com.mchange.v2.resourcepool.BasicResourcePool.doAcquire(BasicResourcePool.java:1014)
at com.mchange.v2.resourcepool.BasicResourcePool.access$800(BasicResourcePool.java:32)
at com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask.run(BasicResourcePool.java:1810)
at com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:547)
【问题讨论】：