Avneesh Sisodia [https://community.jboss.org/people/avneesh] created the discussion "Error creating bean with name 'taskResourceFactory' defined in class path resource [META-INF/spring/applicationContext.xml]" To view the discussion, visit: https://community.jboss.org/message/761043#761043 -------------------------------------------------------------- Hi, When I am trying to create Local Task Service for jbpm human task using spring framework. It throwing exception. I have a java class TaskResourceFactory.java public class TaskResourceFactory implements ApplicationContextAware {     private static final Logger logger = LoggerFactory.getLogger(TaskResourceFactory.class);     private static ApplicationContext context;     private static TaskService taskService;     private static AbstractPlatformTransactionManager transactionManager;         @Override     public void setApplicationContext(ApplicationContext applicationContext)             throws BeansException {         this.context = applicationContext;     }     public TaskResourceFactory(TaskService tService, AbstractPlatformTransactionManager tManager) {         TaskResourceFactory.taskService = tService;         TaskResourceFactory.transactionManager = tManager;             }             public static LocalTaskService getTaskClient(TaskService taskService, AbstractPlatformTransactionManager transactionManager) {         initializeSessionFactory(transactionManager);           logger.debug("Creating local task service client, based on {}",taskService);         LocalTaskService returnBean = new LocalTaskService(taskService);           logger.debug("Returning task client: {}", returnBean.toString());         return returnBean;     }       public static void initializeSessionFactory(AbstractPlatformTransactionManager transactionManager) {         logger.debug("Initializing the session factory");         TaskSessionSpringFactoryImpl springFactory = (TaskSessionSpringFactoryImpl) context.getBean("springTaskSessionFactory");           logger.debug("Setting the transaction manager, based on {}",transactionManager);         TransactionManager taskTx = new DroolsSpringTransactionManager(transactionManager);         springFactory.setTransactionManager(taskTx);           logger.debug("Initializing");         springFactory.initialize();     }     public TaskService getTaskService() {         return taskService;     }     public void setTaskService(TaskService taskService) {         this.taskService = taskService;     }     public AbstractPlatformTransactionManager getTransactionManager() {         return transactionManager;     }     public void setTransactionManager(             AbstractPlatformTransactionManager transactionManager) {         this.transactionManager = transactionManager;     }   When *springFactory* object is to be create it throwing exception. my applicationContext.xml is:      <bean id="transactionManager" class="org.springframework.transaction.jta.JtaTransactionManager">         <property name="transactionManagerName" value="java:jboss/TransactionManager"/>     </bean>        <bean id="dataSource" class="org.springframework.jndi.JndiObjectFactoryBean">         <property name="jndiName" value="java:jboss/datasources/RI"/>     </bean>        <tx:annotation-driven transaction-manager="transactionManager" />     <bean id="jpaVendorAdapter" class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter">         <property name="showSql" value="true" />              <property name="generateDdl" value="true" />     </bean>     <bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">         <property name="persistenceUnitName" value="jbpm" />         <property name="dataSource" ref="dataSource" />         <property name="jpaVendorAdapter" ref="jpaVendorAdapter" />     </bean>        <bean id="jpaTxMgr" class="org.springframework.orm.jpa.JpaTransactionManager">         <property name="entityManagerFactory" ref="entityManagerFactory" />         <property name="nestedTransactionAllowed" value="true"/>     </bean>        <bean id="systemEventListener" class="org.drools.SystemEventListenerFactory" factory-method="getSystemEventListener" />     <bean id="taskService" class="org.jbpm.task.service.TaskService" >         <property name="systemEventListener" ref="systemEventListener" />     </bean>        <bean id="htEm" class="org.springframework.orm.jpa.support.SharedEntityManagerBean">            <property name="entityManagerFactory" ref="entityManagerFactory"/>    </bean>       <bean id="htTxMgr" class="org.drools.container.spring.beans.persistence.HumanTaskSpringTransactionManager">         <constructor-arg ref="transactionManager" />     </bean>           <bean id="springTaskSessionFactory" class="org.jbpm.task.service.persistence.TaskSessionSpringFactoryImpl" depends-on="taskService" >         <property name="transactionManager" ref="htTxMgr" />         <property name="useJTA" value="true" />         <property name="taskService" ref="taskService" />      </bean>     <bean id="taskResourceFactory" class="com.nijhazer.jbpm.quickstart.TaskResourceFactory" factory-method="getTaskClient">                 <constructor-arg type="org.jbpm.task.service.TaskService" ref="taskService" />            <constructor-arg type="org.springframework.transaction.support.AbstractPlatformTransactionManager" ref="transactionManager" />     </bean> stacktrace is: 13:18:57,120 INFO  [stdout] (MSC service thread 1-1) org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'taskResourceFactory' defined in class path resource [META-INF/spring/applicationContext.xml]: Instantiation of bean failed; nested exception is org.springframework.beans.factory.BeanDefinitionStoreException: Factory method [public static org.jbpm.task.service.local.LocalTaskService com.nijhazer.jbpm.quickstart.TaskResourceFactory.getTaskClient (org.jbpm.task.service.TaskService,org.springframework.transaction.support.AbstractPlatformTransactionManager)] threw exception; nested exception is java.lang.NullPointerException   13:18:57,120 INFO  [stdout] (MSC service thread 1-1)     at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:581)   13:18:57,120 INFO  [stdout] (MSC service thread 1-1)     at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod (AbstractAutowireCapableBeanFactory.java:1015)   13:18:57,120 INFO  [stdout] (MSC service thread 1-1)     at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance (AbstractAutowireCapableBeanFactory.java:911)   13:18:57,120 INFO  [stdout] (MSC service thread 1-1)     at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:485)   13:18:57,120 INFO  [stdout] (MSC service thread 1-1)     at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456)   13:18:57,121 INFO  [stdout] (MSC service thread 1-1)     at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:294)   13:18:57,121 INFO  [stdout] (MSC service thread 1-1)     at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:225)   13:18:57,121 INFO  [stdout] (MSC service thread 1-1)     at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:291)   13:18:57,121 INFO  [stdout] (MSC service thread 1-1)     at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193)   13:18:57,121 INFO  [stdout] (MSC service thread 1-1)     at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:585)   13:18:57,121 INFO  [stdout] (MSC service thread 1-1)     at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:913)   13:18:57,121 INFO  [stdout] (MSC service thread 1-1)     at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:464)   13:18:57,121 INFO  [stdout] (MSC service thread 1-1)     at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:385)   13:18:57,121 INFO  [stdout] (MSC service thread 1-1)     at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:284)   13:18:57,122 INFO  [stdout] (MSC service thread 1-1)     at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:111)   13:18:57,122 INFO  [stdout] (MSC service thread 1-1)     at org.apache.catalina.core.StandardContext.contextListenerStart(StandardContext.java:3368)   13:18:57,122 INFO  [stdout] (MSC service thread 1-1)     at org.apache.catalina.core.StandardContext.start(StandardContext.java:3821)   13:18:57,122 INFO  [stdout] (MSC service thread 1-1)     at org.jboss.as.web.deployment.WebDeploymentService.start(WebDeploymentService.java:70)   13:18:57,122 INFO  [stdout] (MSC service thread 1-1)     at org.jboss.msc.service.ServiceControllerImpl$StartTask.run(ServiceControllerImpl.java:1765)   13:18:57,122 INFO  [stdout] (MSC service thread 1-1)     at org.jboss.msc.service.ServiceControllerImpl$ClearTCCLTask.run(ServiceControllerImpl.java:2291)   13:18:57,122 INFO  [stdout] (MSC service thread 1-1)     at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)   13:18:57,122 INFO  [stdout] (MSC service thread 1-1)     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)   13:18:57,122 INFO  [stdout] (MSC service thread 1-1)     at java.lang.Thread.run(Thread.java:662)   13:18:57,122 INFO  [stdout] (MSC service thread 1-1) Caused by: org.springframework.beans.factory.BeanDefinitionStoreException: Factory method [public static org.jbpm.task.service.local.LocalTaskService com.nijhazer.jbpm.quickstart.TaskResourceFactory.getTaskClient (org.jbpm.task.service.TaskService,org.springframework.transaction.support.AbstractPlatformTransactionManager)] threw exception; nested exception is java.lang.NullPointerException   13:18:57,123 INFO  [stdout] (MSC service thread 1-1)     at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:169)   13:18:57,123 INFO  [stdout] (MSC service thread 1-1)     at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:570)   13:18:57,123 INFO  [stdout] (MSC service thread 1-1)     ... 22 more   13:18:57,123 INFO  [stdout] (MSC service thread 1-1) Caused by: java.lang.NullPointerException -------------------------------------------------------------- Reply to this message by going to Community [https://community.jboss.org/message/761043#761043] Start a new discussion in jBPM at Community [https://community.jboss.org/choose-container!input.jspa?contentType=1&...]