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javax.transaction.xa.XAException: com.sun.appserv.connectors.internal.api.PoolingException: java.lang.NullPointerException	at com.sun.enterprise.resource.ConnectorXAResource.handleResourceException(ConnectorXAResource.java:115)	at com.sun.enterprise.resource.ConnectorXAResource.start(ConnectorXAResource.java:150)	at com.sun.enterprise.transaction.JavaEETransactionManagerSimplified.enlistResource(JavaEETransactionManagerSimplified.java:377)	at com.sun.enterprise.resource.rm.ResourceManagerImpl.registerResource(ResourceManagerImpl.java:152)	at com.sun.enterprise.resource.rm.ResourceManagerImpl.enlistResource(ResourceManagerImpl.java:112)	at com.sun.enterprise.resource.pool.PoolManagerImpl.getResource(PoolManagerImpl.java:208)	at com.sun.enterprise.connectors.ConnectionManagerImpl.getResource(ConnectionManagerImpl.java:341)	at com.sun.enterprise.connectors.ConnectionManagerImpl.internalGetConnection(ConnectionManagerImpl.java:304)	at com.sun.enterprise.connectors.ConnectionManagerImpl.allocateConnection(ConnectionManagerImpl.java:190)	at com.sun.enterprise.connectors.ConnectionManagerImpl.allocateConnection(ConnectionManagerImpl.java:165)	at com.sun.enterprise.connectors.ConnectionManagerImpl.allocateConnection(ConnectionManagerImpl.java:160)	at com.sun.gjc.spi.base.DataSource.getConnection(DataSource.java:110)	at org.apache.ibatis.session.defaults.DefaultSqlSessionFactory.openSessionFromDataSource(DefaultSqlSessionFactory.java:72)	at org.apache.ibatis.session.defaults.DefaultSqlSessionFactory.openSession(DefaultSqlSessionFactory.java:32)	at org.activiti.engine.impl.db.DbSqlSession.(DbSqlSession.java:84)	at org.activiti.engine.impl.db.DbSqlSessionFactory.openSession(DbSqlSessionFactory.java:77)	at org.activiti.engine.impl.interceptor.CommandContext.getSession(CommandContext.java:177)	at org.activiti.engine.impl.persistence.AbstractManager.getSession(AbstractManager.java:56)	at org.activiti.engine.impl.persistence.AbstractManager.getDbSqlSession(AbstractManager.java:52)	at org.activiti.engine.impl.persistence.entity.ProcessDefinitionManager.findProcessDefinitionsByQueryCriteria(ProcessDefinitionManager.java:46)	at org.activiti.engine.impl.ProcessDefinitionQueryImpl.executeList(ProcessDefinitionQueryImpl.java:185)	at org.activiti.engine.impl.AbstractQuery.execute(AbstractQuery.java:135)	at org.activiti.engine.impl.interceptor.CommandExecutorImpl.execute(CommandExecutorImpl.java:24)	at org.activiti.engine.impl.interceptor.CommandContextInterceptor.execute(CommandContextInterceptor.java:42)	at org.activiti.engine.impl.interceptor.JtaTransactionInterceptor.execute(JtaTransactionInterceptor.java:59)	at org.activiti.engine.impl.interceptor.LogInterceptor.execute(LogInterceptor.java:33)	at org.activiti.engine.impl.AbstractQuery.list(AbstractQuery.java:109)	at erp.web.faces.beans.tasks.ProcessJSFBean.getProcessList(ProcessJSFBean.java:28)	at sun.reflect.GeneratedMethodAccessor215.invoke(Unknown Source)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)	at java.lang.reflect.Method.invoke(Method.java:597)	at javax.el.BeanELResolver.getValue(BeanELResolver.java:302)	at com.sun.faces.el.DemuxCompositeELResolver._getValue(DemuxCompositeELResolver.java:176)	at com.sun.faces.el.DemuxCompositeELResolver.getValue(DemuxCompositeELResolver.java:203)	at com.sun.el.parser.AstValue.getValue(AstValue.java:116)	at com.sun.el.parser.AstValue.getValue(AstValue.java:163)	at com.sun.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:219)	at org.jboss.weld.el.WeldValueExpression.getValue(WeldValueExpression.java:55)	at com.sun.faces.facelets.el.TagValueExpression.getValue(TagValueExpression.java:109)	at javax.faces.component.ComponentStateHelper.eval(ComponentStateHelper.java:194)	at javax.faces.component.ComponentStateHelper.eval(ComponentStateHelper.java:182)	at javax.faces.component.UIData.getValue(UIData.java:731)	at javax.faces.component.UIData.getDataModel(UIData.java:1798)	at javax.faces.component.UIData.setRowIndexWithoutRowStatePreserved(UIData.java:484)	at javax.faces.component.UIData.setRowIndex(UIData.java:473)	at javax.faces.component.UIData.visitTree(UIData.java:1401)	at javax.faces.component.UIComponent.visitTree(UIComponent.java:1600)	at javax.faces.component.UIForm.visitTree(UIForm.java:344)	at javax.faces.component.UIComponent.visitTree(UIComponent.java:1600)	at javax.faces.component.UIComponent.visitTree(UIComponent.java:1600)	at javax.faces.component.UIComponent.visitTree(UIComponent.java:1600)	at javax.faces.component.UIComponent.visitTree(UIComponent.java:1600)	at com.sun.faces.application.view.StateManagementStrategyImpl.saveView(StateManagementStrategyImpl.java:149)	at com.sun.faces.application.StateManagerImpl.saveView(StateManagerImpl.java:133)	at javax.faces.application.StateManager.getViewState(StateManager.java:553)	at com.sun.faces.context.PartialViewContextImpl.renderState(PartialViewContextImpl.java:409)	at com.sun.faces.context.PartialViewContextImpl.processPartial(PartialViewContextImpl.java:293)	at javax.faces.context.PartialViewContextWrapper.processPartial(PartialViewContextWrapper.java:183)	at javax.faces.component.UIViewRoot.encodeChildren(UIViewRoot.java:981)	at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1756)	at com.sun.faces.application.view.FaceletViewHandlingStrategy.renderView(FaceletViewHandlingStrategy.java:390)	at com.sun.faces.application.view.MultiViewHandler.renderView(MultiViewHandler.java:131)	at javax.faces.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:288)	at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:121)	at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)	at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:139)	at javax.faces.webapp.FacesServlet.service(FacesServlet.java:410)	at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1534)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:343)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:215)	at org.primefaces.webapp.filter.FileUploadFilter.doFilter(FileUploadFilter.java:77)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:256)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:215)	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:279)	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)	at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:655)	at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:595)	at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:98)	at com.sun.enterprise.web.PESessionLockingStandardPipeline.invoke(PESessionLockingStandardPipeline.java:91)	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:162)	at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:326)	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:227)	at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:170)	at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:822)	at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:719)	at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:1013)	at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:225)	at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:137)	at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:104)	at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:90)	at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:79)	at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:54)	at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:59)	at com.sun.grizzly.ContextTask.run(ContextTask.java:71)	at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:532)	at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:513)	at java.lang.Thread.run(Thread.java:662)