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POSpring 3 NPE with LazyConnectionDataSourceProxy autoCommit
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I'm using Spring 3 with JPA and I'm seeing an intermittent issue in my web application. I have wrapper for the JPA EntityManager that calls the underlying EntityManager crud methods. I see a NPE sometimes when I call <code>entityManager.persist(object);</code> It looks the the database connection is lost but I'm not 100% what is the cause. Anyone have any details on what may have caused the below exception? Spring Version: 3.0.6.RELEASE Spring 3 LazyConnectionDataSourceProxy.java line 416: <pre><code>if (this.autoCommit != null && this.autoCommit != this.target.getAutoCommit()) { this.target.setAutoCommit(this.autoCommit); } </code></pre> Exception: <pre><code>Caused by: java.lang.NullPointerException at org.springframework.jdbc.datasource.LazyConnectionDataSourceProxy$LazyConnectionInvocationHandler.getTargetConnection(LazyConnectionDataSourceProxy.java:416) at org.springframework.jdbc.datasource.LazyConnectionDataSourceProxy$LazyConnectionInvocationHandler.invoke(LazyConnectionDataSourceProxy.java:376) at $Proxy64.prepareStatement(Unknown Source) at org.hibernate.jdbc.AbstractBatcher.getPreparedStatement(AbstractBatcher.java:534) at org.hibernate.jdbc.AbstractBatcher.prepareSelectStatement(AbstractBatcher.java:145) at org.hibernate.id.SequenceGenerator.generate(SequenceGenerator.java:96) at org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:122) at org.hibernate.ejb.event.EJB3PersistEventListener.saveWithGeneratedId(EJB3PersistEventListener.java:49) at org.hibernate.event.def.DefaultPersistEventListener.entityIsTransient(DefaultPersistEventListener.java:154) at org.hibernate.event.def.DefaultPersistEventListener.onPersist(DefaultPersistEventListener.java:110) at org.hibernate.event.def.DefaultPersistEventListener.onPersist(DefaultPersistEventListener.java:61) at org.hibernate.impl.SessionImpl.firePersist(SessionImpl.java:646) at org.hibernate.impl.SessionImpl.persist(SessionImpl.java:620) at org.hibernate.impl.SessionImpl.persist(SessionImpl.java:624) at org.hibernate.ejb.AbstractEntityManagerImpl.persist(AbstractEntityManagerImpl.java:220) at sun.reflect.GeneratedMethodAccessor101.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:592) at org.springframework.orm.jpa.SharedEntityManagerCreator$SharedEntityManagerInvocationHandler.invoke(SharedEntityManagerCreator.java:240) at $Proxy79.persist(Unknown Source) at myapp.api.dao.impl.GenericDAOImpl.save(GenericDAOImpl.java:50) at sun.reflect.GeneratedMethodAccessor100.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:592) at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:309) at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:183) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150) at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:155) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172) at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:202) at $Proxy119.save(Unknown Source) at myapp.api.service.impl.backoffice.StoringServiceImpl.store(StoringServiceImpl.java:89) at myapp.api.service.impl.backoffice.StoringServiceImpl.storeIncludedFeatureMessage(StoringServiceImpl.java:68) at sun.reflect.GeneratedMethodAccessor124.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:592) at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:309) at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:183) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150) at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:110) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172) at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:202) at $Proxy168.storeIncludedFeatureMessage(Unknown Source) at myapp.api.listener.backoffice.StorableMessageListener.processNew(StorableMessageListener.java:136) at myapp.api.listener.backoffice.StorableMessageListener.onMessage(StorableMessageListener.java:187) ... 34 more </code></pre> Spring Configuration: <pre><code> <?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:util="http://www.springframework.org/schema/util" xmlns:context="http://www.springframework.org/schema/context" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:hz="http://www.hazelcast.com/schema/spring" xsi:schemaLocation=" http://www.hazelcast.com/schema/spring http://www.hazelcast.com/schema/spring/hazelcast-spring-2.5.xsd http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd">  <context:annotation-config /> <context:component-scan base-package="myapp.api" /> <aop:aspectj-autoproxy/>  <bean class="org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor" /> <tx:annotation-driven /> <bean class="org.springframework.dao.annotation.PersistenceExceptionTranslationPostProcessor" /> <bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean"> <property name="dataSource" ref="dataSource" /> <property name="jpaVendorAdapter" ref="jpaVendorAdapter" /> <property name="persistenceUnitName" value="MyApp" /> <property name="jpaProperties"> <props> <prop key="hibernate.use_sql_comments">true</prop> <prop key="hibernate.generate_statistics">true</prop> <prop key="hibernate.archive.autodetection">class</prop> <prop key="hibernate.cache.use_second_level_cache">true</prop> <prop key="hibernate.cache.provider_class">com.hazelcast.hibernate.provider.HazelcastCacheProvider</prop> <prop key="hibernate.cache.use_query_cache">true</prop> <prop key="hibernate.cache.use_minimal_puts">true</prop> </props> </property> </bean> <hz:hazelcast id="instance"> <hz:config> //rest of Hazelast config here </hz:config> </hz:hazelcast> <hz:hibernate-region-factory id="regionFactory" instance-ref="instance"/>  <bean id="jpaVendorAdapter" class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter"> <property name="showSql" value="true" /> <property name="generateDdl" value="true" /> <property name="databasePlatform" value="org.hibernate.dialect.OracleDialect" /> </bean> <bean id="dataSourceTarget" class="oracle.jdbc.pool.OracleDataSource" destroy-method="close"> <property name="URL" value="jdbc:oracle:thin:@server:1525:name" /> <property name="user" value="test" /> <property name="password" value="123" /> <property name="connectionCachingEnabled" value="true" /> <property name="connectionCacheProperties"> <props merge="default"> <prop key="MinLimit">5</prop> <prop key="MaxLimit">50</prop> </props> </property> </bean> <bean id="dataSource" class="org.springframework.jdbc.datasource.LazyConnectionDataSourceProxy"> <property name="targetDataSource" ref="dataSourceTarget"/> </bean> <bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager"> <property name="entityManagerFactory" ref="entityManagerFactory"/> <property name="dataSource" ref="dataSource"/> </bean> <tx:annotation-driven transaction-manager="transactionManager" proxy-target-class="false"/> <bean id="genericDAO" class="myapp.api.dao.impl.GenericDAOImpl"> <constructor-arg> <value>java.io.Serializable</value> </constructor-arg> </bean> <bean id="springContextHolder" class="myapp.api.util.SpringContextHolder" factory-method="getInstance" /> <bean id="executionInterceptor" class="myapp.api.listener.backoffice.ExecutionInterceptor" /> </beans> </code></pre> AOP Error Handler: <pre><code>package myapp.api.listener.backoffice; import javax.jms.Message; import org.aspectj.lang.JoinPoint; import org.aspectj.lang.ProceedingJoinPoint; import org.aspectj.lang.annotation.AfterReturning; import org.aspectj.lang.annotation.AfterThrowing; import org.aspectj.lang.annotation.Around; import org.aspectj.lang.annotation.Aspect; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.beans.factory.annotation.Qualifier; import org.springframework.jms.core.JmsTemplate; import org.springframework.util.StopWatch; @Aspect public class ExecutionInterceptor extends BaseListener{ //protected Log log = LogFactory.getLog(this.getClass()); private String errorDestination="ErrorQ"; @Autowired @Qualifier("jmsTemplate") JmsTemplate jmsTemplate; @Around("execution(* onMessage(javax.jms.Message))") public Object aroundOnMessage(ProceedingJoinPoint pjp) throws Throwable{ StopWatch stopWatch = new StopWatch(); stopWatch.start(); Object retVal = pjp.proceed(); stopWatch.stop(); log.trace( pjp.getSignature().getName() + " Execution Time: " + stopWatch.getTotalTimeMillis()+" ms" ); return retVal; } @AfterReturning("execution(* onMessage(javax.jms.Message))") public void afterOnMessage(){ // logic to capture time log.debug("*****************************EXIT ONMESSAGE*******************************"); } @Around("execution(* commit(..))") public Object aroundCommit(ProceedingJoinPoint pjp) throws Throwable{ try{ return pjp.proceed(); }catch(Throwable ex){ log.error( "Unexpected Error occured during database commit routing message to ErrorQ", ex); jmsTemplate.convertAndSend(errorDestination, ex); throw ex; }finally{ log.trace( "Commiting Transaction..."); } } @AfterThrowing(value="execution(* onMessage(javax.jms.Message) throws java.lang.RuntimeException)",throwing="ex") public void afterThrowingOnMessage(JoinPoint jp,RuntimeException ex) throws RuntimeException{ log.trace("Unexpected Error occured during onMessage processing routing to ErrorQ"); log.error("{{ERROR}}", ex); Object[] args = jp.getArgs(); if (args!=null && args[0] instanceof javax.jms.Message){ Message msg = (Message)args[0]; jmsTemplate.convertAndSend(errorDestination, msg); log.info("Unexpected Error occured successfully routed to ErrorQ"); }else log.info("Unexpected Error occured failed to route to ErrorQ"); } } </code></pre>
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Spring 3 NPE with LazyConnectionDataSourceProxy autoCommit
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