java.lang.NullPointerException

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    "Cannot unlock a never acquired lock" error

    Google Groups | 2 years ago | Jing Chen
    java.lang.NullPointerException
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    Root Cause Analysis

    1. java.lang.NullPointerException

      No message provided

      at org.springframework.web.servlet.view.UrlBasedViewResolver.loadView()
    2. Spring MVC
      FrameworkServlet.doPost
      1. org.springframework.web.servlet.view.UrlBasedViewResolver.loadView(UrlBasedViewResolver.java:438)
      2. org.springframework.web.servlet.view.AbstractCachingViewResolver.createView(AbstractCachingViewResolver.java:241)
      3. org.springframework.web.servlet.view.UrlBasedViewResolver.createView(UrlBasedViewResolver.java:401)
      4. org.springframework.web.servlet.view.AbstractCachingViewResolver.resolveViewName(AbstractCachingViewResolver.java:153)
      5. org.springframework.web.servlet.DispatcherServlet.resolveViewName(DispatcherServlet.java:1239)
      6. org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1188)
      7. org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:992)
      8. org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:939)
      9. org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:856)
      10. org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:953)
      11. org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:855)
      11 frames
    3. JavaServlet
      HttpServlet.service
      1. javax.servlet.http.HttpServlet.service(HttpServlet.java:751)
      1 frame
    4. Spring MVC
      FrameworkServlet.service
      1. org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:829)
      1 frame
    5. JavaServlet
      HttpServlet.service
      1. javax.servlet.http.HttpServlet.service(HttpServlet.java:844)
      1 frame
    6. Atmosphere weblogic
      FilterChainImpl.doFilter
      1. weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:280)
      2. weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:254)
      3. weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:136)
      4. weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:341)
      5. weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:25)
      6. weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:79)
      6 frames