java.lang.NullPointerException

XWiki.org JIRA | Vincent Massol | 6 years ago
tip
Click on the to mark the solution that helps you, Samebug will learn from it.
As a community member, you’ll be rewarded for you help.
  1. 0

    To reproduce: * Configure 2 local XE in cluster mode (standard config) * In your browser go to http://localhost:8080 * Then in your broweser go to http://localhost:8081 (the second XE instance) You'll see the following logs in the console of the first instance: {noformat} 2011-05-04 16:41:16,663 [Incoming-2,event,vincent-massols-macbook-pro.local-63711] DEBUG jgroups.DefaultJGroupsReceiver - Received JGroups remote event [event: [org.xwiki.bridge.event.DocumentCreatedEvent@6a1b3275], source: [{docversion=1.1, doclanguage=, docname=name = [JavaScriptExtension], type = [DOCUMENT], parent = [name = [XWiki], type = [SPACE], parent = [name = [xwiki], type = [WIKI], parent = [null]]]}], data: [{contextwiki=xwiki, contextuser=XWiki.XWikiGuest}]] 2011-05-04 16:41:16,716 [Incoming-2,event,vincent-massols-macbook-pro.local-63711] ERROR rnal.DefaultObservationManager - Fail to send event [org.xwiki.bridge.event.DocumentCreatedEvent@6a1b3275] to listener [com.xpn.xwiki.plugin.watchlist.WatchListStore@5abc5c2c] java.lang.NullPointerException at org.mortbay.jetty.HttpFields.put(HttpFields.java:560) at org.mortbay.jetty.HttpFields.put(HttpFields.java:509) at org.mortbay.jetty.Response.setLocale(Response.java:1048) at com.xpn.xwiki.web.XWikiServletResponse.setLocale(XWikiServletResponse.java:149) at com.xpn.xwiki.XWiki.prepareResources(XWiki.java:4021) at com.xpn.xwiki.XWikiContext.getMessageTool(XWikiContext.java:656) at com.xpn.xwiki.plugin.watchlist.WatchListStore.setWatchListElementsProperty(WatchListStore.java:549) at com.xpn.xwiki.plugin.watchlist.WatchListStore.addWatchedElement(WatchListStore.java:463) at com.xpn.xwiki.plugin.watchlist.WatchListStore.documentModifiedHandler(WatchListStore.java:764) at com.xpn.xwiki.plugin.watchlist.WatchListStore.onEvent(WatchListStore.java:787) at org.xwiki.observation.internal.DefaultObservationManager.notify(DefaultObservationManager.java:278) at org.xwiki.observation.internal.DefaultObservationManager.notify(DefaultObservationManager.java:247) at org.xwiki.observation.remote.internal.DefaultRemoteObservationManager.notify(DefaultRemoteObservationManager.java:176) at org.xwiki.observation.remote.internal.jgroups.DefaultJGroupsReceiver.receive(DefaultJGroupsReceiver.java:101) at org.jgroups.JChannel.up(JChannel.java:1462) at org.jgroups.stack.ProtocolStack.up(ProtocolStack.java:829) at org.jgroups.protocols.pbcast.GMS.up(GMS.java:890) at org.jgroups.protocols.VIEW_SYNC.up(VIEW_SYNC.java:173) at org.jgroups.protocols.pbcast.STABLE.up(STABLE.java:236) at org.jgroups.protocols.UNICAST.up(UNICAST.java:290) at org.jgroups.protocols.pbcast.NAKACK.handleMessage(NAKACK.java:859) at org.jgroups.protocols.pbcast.NAKACK.up(NAKACK.java:654) at org.jgroups.protocols.Discovery.up(Discovery.java:277) at org.jgroups.protocols.TP.passMessageUp(TP.java:953) at org.jgroups.protocols.TP.access$100(TP.java:53) at org.jgroups.protocols.TP$IncomingPacket.handleMyMessage(TP.java:1457) at org.jgroups.protocols.TP$IncomingPacket.run(TP.java:1434) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) at java.lang.Thread.run(Thread.java:680) {noformat}

    XWiki.org JIRA | 6 years ago | Vincent Massol
    java.lang.NullPointerException
  2. 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
  3. 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
  4. Speed up your debug routine!

    Automated exception search integrated into your IDE

  5. 0

    Cloud Foundry v2 in Grails

    Stack Overflow | 3 years ago | angelo087
    java.lang.NullPointerException: Cannot invoke method getAt() on null object
  6. 0

    NullPointerException in MIDlet with left soft key

    Stack Overflow | 6 years ago | berry120
    java.lang.NullPointerException: 0 at javax.microedition.lcdui.Display$ChameleonTunnel.callItemListener(), bci=57 at com.sun.midp.chameleon.layers.SoftButtonLayer.processCommand(), bci=57 at com.sun.midp.chameleon.layers.SoftButtonLayer.soft1(), bci=37 at com.sun.midp.chameleon.layers.SoftButtonLayer.keyInput(), bci=36 at com.sun.midp.chameleon.CWindow.keyInput(), bci=38 at javax.microedition.lcdui.Display$DisplayEventConsumerImpl.handleKeyEvent(), bci=17 at com.sun.midp.lcdui.DisplayEventListener.process(), bci=277 at com.sun.midp.events.EventQueue.run(), bci=179

    Not finding the right solution?
    Take a tour to get the most out of Samebug.

    Tired of useless tips?

    Automated exception search integrated into your IDE

    Root Cause Analysis

    1. java.lang.NullPointerException

      No message provided

      at org.mortbay.jetty.HttpFields.put()
    2. Jetty Server
      Response.setLocale
      1. org.mortbay.jetty.HttpFields.put(HttpFields.java:560)
      2. org.mortbay.jetty.HttpFields.put(HttpFields.java:509)
      3. org.mortbay.jetty.Response.setLocale(Response.java:1048)
      3 frames
    3. com.xpn.xwiki
      WatchListStore.onEvent
      1. com.xpn.xwiki.web.XWikiServletResponse.setLocale(XWikiServletResponse.java:149)
      2. com.xpn.xwiki.XWiki.prepareResources(XWiki.java:4021)
      3. com.xpn.xwiki.XWikiContext.getMessageTool(XWikiContext.java:656)
      4. com.xpn.xwiki.plugin.watchlist.WatchListStore.setWatchListElementsProperty(WatchListStore.java:549)
      5. com.xpn.xwiki.plugin.watchlist.WatchListStore.addWatchedElement(WatchListStore.java:463)
      6. com.xpn.xwiki.plugin.watchlist.WatchListStore.documentModifiedHandler(WatchListStore.java:764)
      7. com.xpn.xwiki.plugin.watchlist.WatchListStore.onEvent(WatchListStore.java:787)
      7 frames
    4. org.xwiki.observation
      DefaultJGroupsReceiver.receive
      1. org.xwiki.observation.internal.DefaultObservationManager.notify(DefaultObservationManager.java:278)
      2. org.xwiki.observation.internal.DefaultObservationManager.notify(DefaultObservationManager.java:247)
      3. org.xwiki.observation.remote.internal.DefaultRemoteObservationManager.notify(DefaultRemoteObservationManager.java:176)
      4. org.xwiki.observation.remote.internal.jgroups.DefaultJGroupsReceiver.receive(DefaultJGroupsReceiver.java:101)
      4 frames
    5. JGroups
      TP$IncomingPacket.run
      1. org.jgroups.JChannel.up(JChannel.java:1462)
      2. org.jgroups.stack.ProtocolStack.up(ProtocolStack.java:829)
      3. org.jgroups.protocols.pbcast.GMS.up(GMS.java:890)
      4. org.jgroups.protocols.VIEW_SYNC.up(VIEW_SYNC.java:173)
      5. org.jgroups.protocols.pbcast.STABLE.up(STABLE.java:236)
      6. org.jgroups.protocols.UNICAST.up(UNICAST.java:290)
      7. org.jgroups.protocols.pbcast.NAKACK.handleMessage(NAKACK.java:859)
      8. org.jgroups.protocols.pbcast.NAKACK.up(NAKACK.java:654)
      9. org.jgroups.protocols.Discovery.up(Discovery.java:277)
      10. org.jgroups.protocols.TP.passMessageUp(TP.java:953)
      11. org.jgroups.protocols.TP.access$100(TP.java:53)
      12. org.jgroups.protocols.TP$IncomingPacket.handleMyMessage(TP.java:1457)
      13. org.jgroups.protocols.TP$IncomingPacket.run(TP.java:1434)
      13 frames
    6. Java RT
      Thread.run
      1. java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
      2. java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
      3. java.lang.Thread.run(Thread.java:680)
      3 frames