java.lang.NullPointerException: This exception has no message.

Searched on Google with the first line of a JAVA stack trace?

We can recommend more relevant solutions and speed up debugging when you paste your entire stack trace with the exception message. Try a sample exception.

Recommended solutions based on your search

Solutions on the web

via XWiki.org JIRA by Vincent Massol, 1 year ago
This exception has no message.
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 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)

Users with the same issue

You are the first who have seen this exception. Write a tip to help other users and build your expert profile.

Know the solutions? Share your knowledge to help other developers to debug faster.