java.lang.NullPointerException

GitHub | chowyb | 7 months ago
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Root Cause Analysis

  1. java.lang.NullPointerException

    No message provided

    at org.apache.poi.POIXMLDocument.write()
  2. POI
    POIXMLDocument.write
    1. org.apache.poi.POIXMLDocument.write(POIXMLDocument.java:217)
    1 frame
  3. teammates.ui.controller
    ControllerServlet.doPost
    1. teammates.ui.controller.XlsxFileDownloadResult.send(XlsxFileDownloadResult.java:44)
    2. teammates.ui.controller.ControllerServlet.doPost(ControllerServlet.java:65)
    2 frames
  4. JavaServlet
    HttpServlet.service
    1. javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
    2. javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
    2 frames
  5. Jetty Server
    ServletHandler$CachedChain.doFilter
    1. org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)
    2. org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1166)
    2 frames
  6. teammates.storage.datastore
    DatastoreFilter.doFilter
    1. teammates.storage.datastore.DatastoreFilter.doFilter(DatastoreFilter.java:29)
    1 frame
  7. Jetty Server
    ServletHandler$CachedChain.doFilter
    1. org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
    1 frame
  8. Google AppEngine
    AppstatsFilter.doFilter
    1. com.google.appengine.tools.appstats.AppstatsFilter.doFilter(AppstatsFilter.java:143)
    1 frame
  9. Jetty Server
    ServletHandler$CachedChain.doFilter
    1. org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
    1 frame
  10. com.google.appengine
    DevSocketFilter.doFilter
    1. com.google.appengine.api.socket.dev.DevSocketFilter.doFilter(DevSocketFilter.java:74)
    1 frame
  11. Jetty Server
    ServletHandler$CachedChain.doFilter
    1. org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
    1 frame
  12. AppEngine Testing
    ResponseRewriterFilter.doFilter
    1. com.google.appengine.tools.development.ResponseRewriterFilter.doFilter(ResponseRewriterFilter.java:128)
    1 frame
  13. Jetty Server
    ServletHandler$CachedChain.doFilter
    1. org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
    1 frame
  14. AppEngine Testing
    HeaderVerificationFilter.doFilter
    1. com.google.appengine.tools.development.HeaderVerificationFilter.doFilter(HeaderVerificationFilter.java:34)
    1 frame
  15. Jetty Server
    ServletHandler$CachedChain.doFilter
    1. org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
    1 frame
  16. com.google.appengine
    ServeBlobFilter.doFilter
    1. com.google.appengine.api.blobstore.dev.ServeBlobFilter.doFilter(ServeBlobFilter.java:63)
    1 frame
  17. Jetty Server
    ServletHandler$CachedChain.doFilter
    1. org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
    1 frame
  18. Google AppEngine
    TransactionCleanupFilter.doFilter
    1. com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:43)
    1 frame
  19. Jetty Server
    ServletHandler$CachedChain.doFilter
    1. org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
    1 frame
  20. AppEngine Testing
    StaticFileFilter.doFilter
    1. com.google.appengine.tools.development.StaticFileFilter.doFilter(StaticFileFilter.java:125)
    1 frame
  21. Jetty Server
    ServletHandler$CachedChain.doFilter
    1. org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
    1 frame
  22. AppEngine Testing
    DevAppServerModulesFilter.doFilter
    1. com.google.appengine.tools.development.DevAppServerModulesFilter.doDirectRequest(DevAppServerModulesFilter.java:366)
    2. com.google.appengine.tools.development.DevAppServerModulesFilter.doDirectModuleRequest(DevAppServerModulesFilter.java:349)
    3. com.google.appengine.tools.development.DevAppServerModulesFilter.doFilter(DevAppServerModulesFilter.java:116)
    3 frames
  23. Jetty Server
    WebAppContext.handle
    1. org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
    2. org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388)
    3. org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
    4. org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
    5. org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
    6. org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418)
    6 frames
  24. AppEngine Testing
    DevAppEngineWebAppContext.handle
    1. com.google.appengine.tools.development.DevAppEngineWebAppContext.handle(DevAppEngineWebAppContext.java:98)
    1 frame
  25. Jetty Server
    HandlerWrapper.handle
    1. org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
    1 frame
  26. AppEngine Testing
    JettyContainerService$ApiProxyHandler.handle
    1. com.google.appengine.tools.development.JettyContainerService$ApiProxyHandler.handle(JettyContainerService.java:509)
    1 frame
  27. Jetty Server
    SelectChannelEndPoint.run
    1. org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
    2. org.mortbay.jetty.Server.handle(Server.java:326)
    3. org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)
    4. org.mortbay.jetty.HttpConnection$RequestHandler.content(HttpConnection.java:938)
    5. org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:755)
    6. org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:218)
    7. org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
    8. org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:409)
    8 frames
  28. Jetty Util
    QueuedThreadPool$PoolThread.run
    1. org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582)
    1 frame