java.lang.NullPointerException

Spring JIRA | Alef Arendsen | 1 decade ago
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  1. 0

    My test app features a mvc.FlowController, a simple flow and the user does not yet have a session. When starting a flow, this results in an NPE while synchronizing on the session in the SharedMapFlowExecutionRepository. I think error messages could be improved here, right? java.lang.NullPointerException at org.springframework.webflow.execution.repository.SharedMapFlowExecutionRepositoryFactory.getRepository(SharedMapFlowExecutionRepositoryFactory.java:56) at org.springframework.webflow.manager.FlowExecutionManagerImpl.getRepository(FlowExecutionManagerImpl.java:176) at org.springframework.webflow.manager.FlowExecutionManagerImpl.launch(FlowExecutionManagerImpl.java:213) at org.springframework.webflow.manager.support.FlowExecutionManagerHelper.handleFlowRequest(FlowExecutionManagerHelper.java:101) at org.springframework.webflow.manager.mvc.FlowController.handleRequestInternal(FlowController.java:173) at org.springframework.web.servlet.mvc.AbstractController.handleRequest(AbstractController.java:153) at org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:45) at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:789) at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:723) at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:396) at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:350) at javax.servlet.http.HttpServlet.service(HttpServlet.java:689) at javax.servlet.http.HttpServlet.service(HttpServlet.java:802) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869) at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:667) at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527) at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80) at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684) at java.lang.Thread.run(Thread.java:595)

    Spring JIRA | 1 decade ago | Alef Arendsen
    java.lang.NullPointerException
  2. 0

    My test app features a mvc.FlowController, a simple flow and the user does not yet have a session. When starting a flow, this results in an NPE while synchronizing on the session in the SharedMapFlowExecutionRepository. I think error messages could be improved here, right? java.lang.NullPointerException at org.springframework.webflow.execution.repository.SharedMapFlowExecutionRepositoryFactory.getRepository(SharedMapFlowExecutionRepositoryFactory.java:56) at org.springframework.webflow.manager.FlowExecutionManagerImpl.getRepository(FlowExecutionManagerImpl.java:176) at org.springframework.webflow.manager.FlowExecutionManagerImpl.launch(FlowExecutionManagerImpl.java:213) at org.springframework.webflow.manager.support.FlowExecutionManagerHelper.handleFlowRequest(FlowExecutionManagerHelper.java:101) at org.springframework.webflow.manager.mvc.FlowController.handleRequestInternal(FlowController.java:173) at org.springframework.web.servlet.mvc.AbstractController.handleRequest(AbstractController.java:153) at org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:45) at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:789) at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:723) at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:396) at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:350) at javax.servlet.http.HttpServlet.service(HttpServlet.java:689) at javax.servlet.http.HttpServlet.service(HttpServlet.java:802) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869) at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:667) at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527) at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80) at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684) at java.lang.Thread.run(Thread.java:595)

    Spring JIRA | 1 decade ago | Alef Arendsen
    java.lang.NullPointerException
  3. 0

    Getting a nullpointer exception when switching displayables in J2ME

    Stack Overflow | 6 years ago | Pallinder
    java.lang.NullPointerException: 0 at javax.microedition.lcdui.Display$ChameleonTunnel.callScreenListener(), bci=46 at com.sun.midp.chameleon.layers.SoftButtonLayer.processCommand(), bci=74 at com.sun.midp.chameleon.layers.SoftButtonLayer.soft1(), bci=37 at com.sun.midp.chameleon.layers.SoftButtonLayer.keyInput(), bci=36 at com.sun.midp.chameleon.CWindow.keyInput(), bci=38 at javax.microedition.lcdui.Display$DisplayEventConsumerImpl.handleKeyEvent(), bci=17 at com.sun.midp.lcdui.DisplayEventListener.process(), bci=277 at com.sun.midp.events.EventQueue.run(), bci=179
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  5. 0

    J2ME (Java) - Null Pointer Exception caught in Display Class

    Stack Overflow | 6 years ago | Tom
    java.lang.NullPointerException: 0 at javax.microedition.lcdui.Display$ChameleonTunnel.callScreenListener(), bci=46 at com.sun.midp.chameleon.layers.SoftButtonLayer.processCommand(), bci=74 at com.sun.midp.chameleon.layers.SoftButtonLayer.soft1(), bci=37 at com.sun.midp.chameleon.layers.SoftButtonLayer.keyInput(), bci=36 at com.sun.midp.chameleon.CWindow.keyInput(), bci=38 at javax.microedition.lcdui.Display$DisplayEventConsumerImpl.handleKeyEvent(), bci=17 at com.sun.midp.lcdui.DisplayEventListener.process(), bci=277 at com.sun.midp.events.EventQueue.run(), bci=179
  6. 0

    Cloud Foundry v2 in Grails

    Stack Overflow | 2 years ago | angelo087
    java.lang.NullPointerException: Cannot invoke method getAt() on null object

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    Root Cause Analysis

    1. java.lang.NullPointerException

      No message provided

      at org.springframework.webflow.execution.repository.SharedMapFlowExecutionRepositoryFactory.getRepository()
    2. Spring Web Flow
      SharedMapFlowExecutionRepositoryFactory.getRepository
      1. org.springframework.webflow.execution.repository.SharedMapFlowExecutionRepositoryFactory.getRepository(SharedMapFlowExecutionRepositoryFactory.java:56)
      1 frame
    3. org.springframework.webflow
      FlowController.handleRequestInternal
      1. org.springframework.webflow.manager.FlowExecutionManagerImpl.getRepository(FlowExecutionManagerImpl.java:176)
      2. org.springframework.webflow.manager.FlowExecutionManagerImpl.launch(FlowExecutionManagerImpl.java:213)
      3. org.springframework.webflow.manager.support.FlowExecutionManagerHelper.handleFlowRequest(FlowExecutionManagerHelper.java:101)
      4. org.springframework.webflow.manager.mvc.FlowController.handleRequestInternal(FlowController.java:173)
      4 frames
    4. Spring MVC
      FrameworkServlet.doGet
      1. org.springframework.web.servlet.mvc.AbstractController.handleRequest(AbstractController.java:153)
      2. org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:45)
      3. org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:789)
      4. org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:723)
      5. org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:396)
      6. org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:350)
      6 frames
    5. JavaServlet
      HttpServlet.service
      1. javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
      2. javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
      2 frames
    6. Glassfish Core
      CoyoteAdapter.service
      1. org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
      2. org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
      3. org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
      4. org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
      5. org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
      6. org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
      7. org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
      8. org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
      8 frames
    7. Grizzly HTTP
      LeaderFollowerWorkerThread.runIt
      1. org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
      2. org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:667)
      3. org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
      4. org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)
      4 frames
    8. Tomcat Util
      ThreadPool$ControlRunnable.run
      1. org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
      1 frame
    9. Java RT
      Thread.run
      1. java.lang.Thread.run(Thread.java:595)
      1 frame