XWiki Platform
  1. XWiki Platform
  2. XWIKI-8617

"java.lang.LinkageError: loader constraint violation" when restarting after just installing the Workspace UI extension

    Details

    • Tests:
      Unit
    • Difficulty:
      Unknown
    • Documentation:
      N/A
    • Documentation in Release Notes:
      N/A
    • Similar issues:
      XWIKI-8343Workspaces Manager does not work when installed with Extension Manager
      XWIKI-7151Installed extension licenses are lost after server restart
      XWIKI-8603Error when installing Workspace UI on XE
      XWIKI-6991Add hooks into the platform to handle the workspaces feature when it is installed
      XWIKI-8553EM UI does not allow installing an extension on a subwiki when it's installed on another wiki
      XWIKI-8359New workspace is not set up as workspace
      XWIKI-8335Restarting the wiki generates an invalid extension exception after installing the IRCBot app in a subwiki
      XWIKI-8515Localization module does not properly load translations pages registered as documentBundles
      XWIKI-7700Give public script access to job status for a specific extension id
      XWIKI-8628Console error when installing/creating a workspace using workspaces installed with EM

      Description

      This actually happens on 4.4/3-SNAPSHOT.
      How to reproduce:

      1. Download XE 4.4-SNAPSHOT jetty-hsqldb
      2. Add the snapshots repository and set to virtual=1
      3. Install org.xwiki.platform:xwiki-platform-workspace-ui 4.4-SNAPSHOT on the entire farm
      4. uninstall workspace-ui from the entire farm and re-install it but only on the main wiki
      5. Restart XWiki and access an open the homepage
      org.xwiki.velocity.XWikiVelocityException: Failed to evaluate content with id [/templates/menuview.vm]
              at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluate(DefaultVelocityEngine.java:247)
              at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluate(DefaultVelocityEngine.java:187)
              at com.xpn.xwiki.render.XWikiVelocityRenderer.evaluate(XWikiVelocityRenderer.java:105)
              at com.xpn.xwiki.XWiki.evaluateTemplate(XWiki.java:1765)
              at com.xpn.xwiki.XWiki.parseTemplate(XWiki.java:1705)
              at com.xpn.xwiki.api.XWiki.parseTemplate(XWiki.java:854)
              at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
              at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
              at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
              at java.lang.reflect.Method.invoke(Method.java:616)
              at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.doInvoke(UberspectImpl.java:395)
              at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.invoke(UberspectImpl.java:384)
              at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:173)
              at org.apache.velocity.runtime.parser.node.ASTReference.execute(ASTReference.java:280)
              at org.apache.velocity.runtime.parser.node.ASTReference.render(ASTReference.java:369)
              at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:72)
              at org.apache.velocity.runtime.directive.VelocimacroProxy.render(VelocimacroProxy.java:216)
              at org.apache.velocity.runtime.directive.RuntimeMacro.render(RuntimeMacro.java:311)
              at org.apache.velocity.runtime.directive.RuntimeMacro.render(RuntimeMacro.java:230)
              at org.apache.velocity.runtime.parser.node.ASTDirective.render(ASTDirective.java:207)
              at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:72)
              at org.apache.velocity.runtime.parser.node.ASTIfStatement.render(ASTIfStatement.java:87)
              at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:342)
              at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluate(DefaultVelocityEngine.java:228)
              at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluate(DefaultVelocityEngine.java:187)
              at com.xpn.xwiki.render.XWikiVelocityRenderer.evaluate(XWikiVelocityRenderer.java:105)
              at com.xpn.xwiki.XWiki.evaluateTemplate(XWiki.java:1765)
              at com.xpn.xwiki.XWiki.parseTemplate(XWiki.java:1705)
              at com.xpn.xwiki.api.XWiki.parseTemplate(XWiki.java:854)
              at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
              at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
              at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
              at java.lang.reflect.Method.invoke(Method.java:616)
              at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.doInvoke(UberspectImpl.java:395)
              at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.invoke(UberspectImpl.java:384)
              at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:173)
              at org.apache.velocity.runtime.parser.node.ASTReference.execute(ASTReference.java:280)
              at org.apache.velocity.runtime.parser.node.ASTReference.render(ASTReference.java:369)
              at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:72)
              at org.apache.velocity.runtime.directive.VelocimacroProxy.render(VelocimacroProxy.java:216)
              at org.apache.velocity.runtime.directive.RuntimeMacro.render(RuntimeMacro.java:311)
              at org.apache.velocity.runtime.directive.RuntimeMacro.render(RuntimeMacro.java:230)
              at org.apache.velocity.runtime.parser.node.ASTDirective.render(ASTDirective.java:207)
              at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:72)
              at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:342)
              at org.apache.velocity.runtime.parser.node.ASTIfStatement.render(ASTIfStatement.java:106)
              at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:342)
              at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluate(DefaultVelocityEngine.java:228)
              at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluate(DefaultVelocityEngine.java:187)
              at com.xpn.xwiki.render.XWikiVelocityRenderer.evaluate(XWikiVelocityRenderer.java:105)
              at com.xpn.xwiki.XWiki.evaluateTemplate(XWiki.java:1765)
              at com.xpn.xwiki.web.Utils.parseTemplate(Utils.java:155)
              at com.xpn.xwiki.web.XWikiAction.execute(XWikiAction.java:241)
              at com.xpn.xwiki.web.XWikiAction.execute(XWikiAction.java:116)
              at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:431)
              at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:236)
              at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
              at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414)
              at javax.servlet.http.HttpServlet.service(HttpServlet.java:707)
              at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
              at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:538)
              at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1352)
              at com.xpn.xwiki.web.ActionFilter.doFilter(ActionFilter.java:120)
              at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1323)
              at org.xwiki.wysiwyg.server.filter.ConversionFilter.doFilter(ConversionFilter.java:144)
              at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1323)
              at com.xpn.xwiki.plugin.webdav.XWikiDavFilter.doFilter(XWikiDavFilter.java:66)
              at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1323)
              at org.xwiki.container.servlet.filters.internal.SavedRequestRestorerFilter.doFilter(SavedRequestRestorerFilter.java:208)
              at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1323)
              at org.xwiki.container.servlet.filters.internal.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:111)
              at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1323)
              at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:476)
              at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:119)
              at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:517)
              at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:225)
              at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:937)
              at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:406)
              at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:183)
              at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:871)
              at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:117)
              at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:247)
              at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:149)
              at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:110)
              at org.eclipse.jetty.server.Server.handle(Server.java:346)
              at org.eclipse.jetty.server.HttpConnection.handleRequest(HttpConnection.java:589)
              at org.eclipse.jetty.server.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:1048)
              at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:601)
              at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:214)
              at org.eclipse.jetty.server.HttpConnection.handle(HttpConnection.java:411)
              at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:535)
              at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:40)
              at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:529)
              at java.lang.Thread.run(Thread.java:679)
      Caused by: org.apache.velocity.exception.MethodInvocationException: Invocation of method 'getWikiDocument' in  class com.xpn.xwiki.plugin.wikimanager.internal.WikiManagerScriptService threw exception java.lang.LinkageError: loader constraint violation: when resolving method "com.xpn.xwiki.plugin.wikimanager.WikiManagerPluginApi.<init>(Lcom/xpn/xwiki/plugin/wikimanager/WikiManagerPlugin;Lcom/xpn/xwiki/XWikiContext;)V" the class loader (instance of org/xwiki/classloader/NamespaceURLClassLoader) of the current class, com/xpn/xwiki/plugin/wikimanager/WikiManagerPlugin, and the class loader (instance of org/xwiki/classloader/NamespaceURLClassLoader) for resolved class, com/xpn/xwiki/plugin/wikimanager/WikiManagerPluginApi, have different Class objects for the type com/xpn/xwiki/plugin/wikimanager/WikiManagerPlugin used in the signature at /templates/menuview.vm[line 165, column 43]
              at org.apache.velocity.runtime.parser.node.ASTMethod.handleInvocationException(ASTMethod.java:261)
              at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:187)
              at org.apache.velocity.runtime.parser.node.ASTReference.execute(ASTReference.java:280)
              at org.apache.velocity.runtime.parser.node.ASTReference.value(ASTReference.java:567)
              at org.apache.velocity.runtime.parser.node.ASTExpression.value(ASTExpression.java:71)
              at org.apache.velocity.runtime.parser.node.ASTSetDirective.render(ASTSetDirective.java:142)
              at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:72)
              at org.apache.velocity.runtime.parser.node.ASTIfStatement.render(ASTIfStatement.java:87)
              at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:72)
              at org.apache.velocity.runtime.parser.node.ASTIfStatement.render(ASTIfStatement.java:87)
              at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:342)
              at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluate(DefaultVelocityEngine.java:228)
              ... 93 more
      Caused by: java.lang.LinkageError: loader constraint violation: when resolving method "com.xpn.xwiki.plugin.wikimanager.WikiManagerPluginApi.<init>(Lcom/xpn/xwiki/plugin/wikimanager/WikiManagerPlugin;Lcom/xpn/xwiki/XWikiContext;)V" the class loader (instance of org/xwiki/classloader/NamespaceURLClassLoader) of the current class, com/xpn/xwiki/plugin/wikimanager/WikiManagerPlugin, and the class loader (instance of org/xwiki/classloader/NamespaceURLClassLoader) for resolved class, com/xpn/xwiki/plugin/wikimanager/WikiManagerPluginApi, have different Class objects for the type com/xpn/xwiki/plugin/wikimanager/WikiManagerPlugin used in the signature
              at com.xpn.xwiki.plugin.wikimanager.WikiManagerPlugin.getPluginApi(WikiManagerPlugin.java:84)
              at com.xpn.xwiki.plugin.wikimanager.internal.WikiManagerScriptService.getAPI(WikiManagerScriptService.java:93)
              at com.xpn.xwiki.plugin.wikimanager.internal.WikiManagerScriptService.getWikiDocument(WikiManagerScriptService.java:174)
              at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
              at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
              at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
              at java.lang.reflect.Method.invoke(Method.java:616)
              at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.doInvoke(UberspectImpl.java:395)
              at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.invoke(UberspectImpl.java:384)
              at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:173)
              ... 103 more
      

      Workaround: Uninstall the Workspace UI from the main wiki. This will avoid the usage of the wikimanager script service in the menuview.vm template.

        Issue Links

          Activity

          Hide
          Thomas Mortagne added a comment - - edited

          I cannot reproduce this on 5.0-SNAPSHOT. What I don't understand is that the error seems to indicate that com.xpn.xwiki.plugin.wikimanager.WikiManagerPlugin is in two different classloaders, you are sure you did not had wiki-manager jar both in WEB-INF/lib and installed as extension ?

          Show
          Thomas Mortagne added a comment - - edited I cannot reproduce this on 5.0-SNAPSHOT. What I don't understand is that the error seems to indicate that com.xpn.xwiki.plugin.wikimanager.WikiManagerPlugin is in two different classloaders, you are sure you did not had wiki-manager jar both in WEB-INF/lib and installed as extension ?
          Hide
          Thomas Mortagne added a comment -

          Closing it, reopen it if you find a new way to reproduce it.

          Show
          Thomas Mortagne added a comment - Closing it, reopen it if you find a new way to reproduce it.
          Hide
          Eduard Moraru added a comment - - edited

          I have just reproduced the problem:

          Exactly the same problem:

          2013-02-22 17:38:58.925:INFO::Started SelectChannelConnector@0.0.0.0:8080 STARTING
          2013-02-22 17:38:58.938:INFO::----------------------------------
          2013-02-22 17:38:59.052:INFO::Server started, you can now open http://Enygma.XWiki:8080/ in your browser to access your wiki.
          2013-02-22 17:38:59.052:INFO::----------------------------------
          2013-02-22 17:39:03,987 [http://localhost:8080/xwiki/bin/view/Main/WebHome] INFO  .HibernateDataMigrationManager - Storage schema updates and data migrations are enabled 
          2013-02-22 17:39:04,009 [http://localhost:8080/xwiki/bin/view/Main/WebHome] INFO  .HibernateDataMigrationManager - No data migration to apply for database [xwiki] currently in version [43000] 
          2013-02-22 17:39:04,010 [http://localhost:8080/xwiki/bin/view/Main/WebHome] INFO  .HibernateDataMigrationManager - Checking Hibernate mapping and updating schema if needed for database [xwiki] 
          org.xwiki.velocity.XWikiVelocityException: Failed to evaluate content with id [/templates/menuview.vm]
                  at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluate(DefaultVelocityEngine.java:247)
                  at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluate(DefaultVelocityEngine.java:187)
                  at com.xpn.xwiki.render.XWikiVelocityRenderer.evaluate(XWikiVelocityRenderer.java:105)
                  at com.xpn.xwiki.internal.template.DefaultPrivilegedTemplateRenderer.evaluate(DefaultPrivilegedTemplateRenderer.java:125)
                  at com.xpn.xwiki.internal.template.DefaultPrivilegedTemplateRenderer.evaluateTemplate(DefaultPrivilegedTemplateRenderer.java:75)
                  at com.xpn.xwiki.XWiki.evaluateTemplate(XWiki.java:1788)
                  at com.xpn.xwiki.XWiki.parseTemplate(XWiki.java:1728)
                  at com.xpn.xwiki.api.XWiki.parseTemplate(XWiki.java:854)
                  at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
                  at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
                  at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
                  at java.lang.reflect.Method.invoke(Method.java:601)
                  at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.doInvoke(UberspectImpl.java:395)
                  at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.invoke(UberspectImpl.java:384)
                  at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:173)
                  at org.apache.velocity.runtime.parser.node.ASTReference.execute(ASTReference.java:280)
                  at org.apache.velocity.runtime.parser.node.ASTReference.render(ASTReference.java:369)
                  at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:72)
                  at org.apache.velocity.runtime.directive.VelocimacroProxy.render(VelocimacroProxy.java:216)
                  at org.apache.velocity.runtime.directive.RuntimeMacro.render(RuntimeMacro.java:311)
                  at org.apache.velocity.runtime.directive.RuntimeMacro.render(RuntimeMacro.java:230)
                  at org.apache.velocity.runtime.parser.node.ASTDirective.render(ASTDirective.java:207)
                  at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:72)
                  at org.apache.velocity.runtime.parser.node.ASTIfStatement.render(ASTIfStatement.java:87)
                  at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:342)
                  at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluate(DefaultVelocityEngine.java:228)
                  at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluate(DefaultVelocityEngine.java:187)
                  at com.xpn.xwiki.render.XWikiVelocityRenderer.evaluate(XWikiVelocityRenderer.java:105)
                  at com.xpn.xwiki.internal.template.DefaultPrivilegedTemplateRenderer.evaluate(DefaultPrivilegedTemplateRenderer.java:125)
                  at com.xpn.xwiki.internal.template.DefaultPrivilegedTemplateRenderer.evaluateTemplate(DefaultPrivilegedTemplateRenderer.java:75)
                  at com.xpn.xwiki.XWiki.evaluateTemplate(XWiki.java:1788)
                  at com.xpn.xwiki.XWiki.parseTemplate(XWiki.java:1728)
                  at com.xpn.xwiki.api.XWiki.parseTemplate(XWiki.java:854)
                  at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
                  at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
                  at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
                  at java.lang.reflect.Method.invoke(Method.java:601)
                  at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.doInvoke(UberspectImpl.java:395)
                  at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.invoke(UberspectImpl.java:384)
                  at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:173)
                  at org.apache.velocity.runtime.parser.node.ASTReference.execute(ASTReference.java:280)
                  at org.apache.velocity.runtime.parser.node.ASTReference.render(ASTReference.java:369)
                  at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:72)
                  at org.apache.velocity.runtime.directive.VelocimacroProxy.render(VelocimacroProxy.java:216)
                  at org.apache.velocity.runtime.directive.RuntimeMacro.render(RuntimeMacro.java:311)
                  at org.apache.velocity.runtime.directive.RuntimeMacro.render(RuntimeMacro.java:230)
                  at org.apache.velocity.runtime.parser.node.ASTDirective.render(ASTDirective.java:207)
                  at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:72)
                  at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:342)
                  at org.apache.velocity.runtime.parser.node.ASTIfStatement.render(ASTIfStatement.java:106)
                  at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:342)
                  at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluate(DefaultVelocityEngine.java:228)
                  at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluate(DefaultVelocityEngine.java:187)
                  at com.xpn.xwiki.render.XWikiVelocityRenderer.evaluate(XWikiVelocityRenderer.java:105)
                  at com.xpn.xwiki.internal.template.DefaultPrivilegedTemplateRenderer.evaluate(DefaultPrivilegedTemplateRenderer.java:125)
                  at com.xpn.xwiki.internal.template.DefaultPrivilegedTemplateRenderer.evaluateTemplate(DefaultPrivilegedTemplateRenderer.java:75)
                  at com.xpn.xwiki.XWiki.evaluateTemplate(XWiki.java:1788)
                  at com.xpn.xwiki.web.Utils.parseTemplate(Utils.java:151)
                  at com.xpn.xwiki.web.XWikiAction.execute(XWikiAction.java:241)
                  at com.xpn.xwiki.web.XWikiAction.execute(XWikiAction.java:116)
                  at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:431)
                  at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:236)
                  at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
                  at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414)
                  at javax.servlet.http.HttpServlet.service(HttpServlet.java:707)
                  at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
                  at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:538)
                  at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1352)
                  at com.xpn.xwiki.web.ActionFilter.doFilter(ActionFilter.java:120)
                  at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1323)
                  at org.xwiki.wysiwyg.server.filter.ConversionFilter.doFilter(ConversionFilter.java:144)
                  at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1323)
                  at com.xpn.xwiki.plugin.webdav.XWikiDavFilter.doFilter(XWikiDavFilter.java:66)
                  at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1323)
                  at org.xwiki.container.servlet.filters.internal.SavedRequestRestorerFilter.doFilter(SavedRequestRestorerFilter.java:208)
                  at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1323)
                  at org.xwiki.container.servlet.filters.internal.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:111)
                  at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1323)
                  at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:476)
                  at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:119)
                  at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:517)
                  at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:225)
                  at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:937)
                  at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:406)
                  at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:183)
                  at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:871)
                  at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:117)
                  at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:247)
                  at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:149)
                  at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:110)
                  at org.eclipse.jetty.server.Server.handle(Server.java:346)
                  at org.eclipse.jetty.server.HttpConnection.handleRequest(HttpConnection.java:589)
                  at org.eclipse.jetty.server.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:1048)
                  at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:601)
                  at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:214)
                  at org.eclipse.jetty.server.HttpConnection.handle(HttpConnection.java:411)
                  at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:535)
                  at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:40)
                  at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:529)
                  at java.lang.Thread.run(Thread.java:722)
          Caused by: org.apache.velocity.exception.MethodInvocationException: Invocation of method 'canCreateWorkspace' in  class org.xwiki.workspace.internal.WorkspaceManagerScriptService threw exception java.lang.LinkageError: loader constraint violation: when resolving method "com.xpn.xwiki.plugin.wikimanager.WikiManagerPluginApi.<init>(Lcom/xpn/xwiki/plugin/wikimanager/WikiManagerPlugin;Lcom/xpn/xwiki/XWikiContext;)V" the class loader (instance of org/xwiki/classloader/NamespaceURLClassLoader) of the current class, com/xpn/xwiki/plugin/wikimanager/WikiManagerPlugin, and the class loader (instance of org/xwiki/classloader/NamespaceURLClassLoader) for resolved class, com/xpn/xwiki/plugin/wikimanager/WikiManagerPluginApi, have different Class objects for the type inApi.<init>(Lcom/xpn/xwiki/plugin/wikimanager/WikiManagerPlugin;Lcom/xpn/xwiki/XWikiContext;)V used in the signature at /templates/menuview.vm[line 54, column 23]
                  at org.apache.velocity.runtime.parser.node.ASTMethod.handleInvocationException(ASTMethod.java:261)
                  at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:187)
                  at org.apache.velocity.runtime.parser.node.ASTReference.execute(ASTReference.java:280)
                  at org.apache.velocity.runtime.parser.node.ASTReference.evaluate(ASTReference.java:530)
                  at org.apache.velocity.runtime.parser.node.ASTAndNode.evaluate(ASTAndNode.java:106)
                  at org.apache.velocity.runtime.parser.node.ASTAndNode.value(ASTAndNode.java:74)
                  at org.apache.velocity.runtime.parser.node.ASTExpression.value(ASTExpression.java:71)
                  at org.apache.velocity.runtime.parser.node.ASTSetDirective.render(ASTSetDirective.java:142)
                  at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:72)
                  at org.apache.velocity.runtime.parser.node.ASTIfStatement.render(ASTIfStatement.java:87)
                  at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:342)
                  at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluate(DefaultVelocityEngine.java:228)
                  ... 99 more
          Caused by: java.lang.LinkageError: loader constraint violation: when resolving method "com.xpn.xwiki.plugin.wikimanager.WikiManagerPluginApi.<init>(Lcom/xpn/xwiki/plugin/wikimanager/WikiManagerPlugin;Lcom/xpn/xwiki/XWikiContext;)V" the class loader (instance of org/xwiki/classloader/NamespaceURLClassLoader) of the current class, com/xpn/xwiki/plugin/wikimanager/WikiManagerPlugin, and the class loader (instance of org/xwiki/classloader/NamespaceURLClassLoader) for resolved class, com/xpn/xwiki/plugin/wikimanager/WikiManagerPluginApi, have different Class objects for the type inApi.<init>(Lcom/xpn/xwiki/plugin/wikimanager/WikiManagerPlugin;Lcom/xpn/xwiki/XWikiContext;)V used in the signature
                  at com.xpn.xwiki.plugin.wikimanager.WikiManagerPlugin.getPluginApi(WikiManagerPlugin.java:84)
                  at com.xpn.xwiki.plugin.wikimanager.internal.WikiManagerScriptService.getAPI(WikiManagerScriptService.java:93)
                  at com.xpn.xwiki.plugin.wikimanager.internal.WikiManagerScriptService.getWikiFromName(WikiManagerScriptService.java:159)
                  at org.xwiki.workspace.internal.DefaultWorkspaceManager.getWorkspace(DefaultWorkspaceManager.java:487)
                  at org.xwiki.workspace.internal.DefaultWorkspaceManager.isWorkspace(DefaultWorkspaceManager.java:604)
                  at org.xwiki.workspace.internal.DefaultWorkspaceManager.canCreateWorkspace(DefaultWorkspaceManager.java:166)
                  at org.xwiki.workspace.internal.WorkspaceManagerScriptService.canCreateWorkspace(WorkspaceManagerScriptService.java:94)
                  at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
                  at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
                  at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
                  at java.lang.reflect.Method.invoke(Method.java:601)
                  at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.doInvoke(UberspectImpl.java:395)
                  at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.invoke(UberspectImpl.java:384)
                  at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:173)
                  ... 109 more
          

          AFAIR from the last time, if you don`t restart the wiki after just installing workspaces, it is working fine. Once you restart, the classloader gets messed-up.

          Show
          Eduard Moraru added a comment - - edited I have just reproduced the problem: XE 5.0-snapshot jetty/hsqldb org.xwiki.platform:xwiki-platform-workspace-ui 5.0-SNAPSHOT Exactly the same problem: 2013-02-22 17:38:58.925:INFO::Started SelectChannelConnector@0.0.0.0:8080 STARTING 2013-02-22 17:38:58.938:INFO::---------------------------------- 2013-02-22 17:38:59.052:INFO::Server started, you can now open http://Enygma.XWiki:8080/ in your browser to access your wiki. 2013-02-22 17:38:59.052:INFO::---------------------------------- 2013-02-22 17:39:03,987 [http://localhost:8080/xwiki/bin/view/Main/WebHome] INFO .HibernateDataMigrationManager - Storage schema updates and data migrations are enabled 2013-02-22 17:39:04,009 [http://localhost:8080/xwiki/bin/view/Main/WebHome] INFO .HibernateDataMigrationManager - No data migration to apply for database [xwiki] currently in version [43000] 2013-02-22 17:39:04,010 [http://localhost:8080/xwiki/bin/view/Main/WebHome] INFO .HibernateDataMigrationManager - Checking Hibernate mapping and updating schema if needed for database [xwiki] org.xwiki.velocity.XWikiVelocityException: Failed to evaluate content with id [/templates/menuview.vm] at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluate(DefaultVelocityEngine.java:247) at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluate(DefaultVelocityEngine.java:187) at com.xpn.xwiki.render.XWikiVelocityRenderer.evaluate(XWikiVelocityRenderer.java:105) at com.xpn.xwiki.internal.template.DefaultPrivilegedTemplateRenderer.evaluate(DefaultPrivilegedTemplateRenderer.java:125) at com.xpn.xwiki.internal.template.DefaultPrivilegedTemplateRenderer.evaluateTemplate(DefaultPrivilegedTemplateRenderer.java:75) at com.xpn.xwiki.XWiki.evaluateTemplate(XWiki.java:1788) at com.xpn.xwiki.XWiki.parseTemplate(XWiki.java:1728) at com.xpn.xwiki.api.XWiki.parseTemplate(XWiki.java:854) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:601) at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.doInvoke(UberspectImpl.java:395) at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.invoke(UberspectImpl.java:384) at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:173) at org.apache.velocity.runtime.parser.node.ASTReference.execute(ASTReference.java:280) at org.apache.velocity.runtime.parser.node.ASTReference.render(ASTReference.java:369) at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:72) at org.apache.velocity.runtime.directive.VelocimacroProxy.render(VelocimacroProxy.java:216) at org.apache.velocity.runtime.directive.RuntimeMacro.render(RuntimeMacro.java:311) at org.apache.velocity.runtime.directive.RuntimeMacro.render(RuntimeMacro.java:230) at org.apache.velocity.runtime.parser.node.ASTDirective.render(ASTDirective.java:207) at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:72) at org.apache.velocity.runtime.parser.node.ASTIfStatement.render(ASTIfStatement.java:87) at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:342) at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluate(DefaultVelocityEngine.java:228) at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluate(DefaultVelocityEngine.java:187) at com.xpn.xwiki.render.XWikiVelocityRenderer.evaluate(XWikiVelocityRenderer.java:105) at com.xpn.xwiki.internal.template.DefaultPrivilegedTemplateRenderer.evaluate(DefaultPrivilegedTemplateRenderer.java:125) at com.xpn.xwiki.internal.template.DefaultPrivilegedTemplateRenderer.evaluateTemplate(DefaultPrivilegedTemplateRenderer.java:75) at com.xpn.xwiki.XWiki.evaluateTemplate(XWiki.java:1788) at com.xpn.xwiki.XWiki.parseTemplate(XWiki.java:1728) at com.xpn.xwiki.api.XWiki.parseTemplate(XWiki.java:854) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:601) at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.doInvoke(UberspectImpl.java:395) at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.invoke(UberspectImpl.java:384) at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:173) at org.apache.velocity.runtime.parser.node.ASTReference.execute(ASTReference.java:280) at org.apache.velocity.runtime.parser.node.ASTReference.render(ASTReference.java:369) at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:72) at org.apache.velocity.runtime.directive.VelocimacroProxy.render(VelocimacroProxy.java:216) at org.apache.velocity.runtime.directive.RuntimeMacro.render(RuntimeMacro.java:311) at org.apache.velocity.runtime.directive.RuntimeMacro.render(RuntimeMacro.java:230) at org.apache.velocity.runtime.parser.node.ASTDirective.render(ASTDirective.java:207) at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:72) at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:342) at org.apache.velocity.runtime.parser.node.ASTIfStatement.render(ASTIfStatement.java:106) at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:342) at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluate(DefaultVelocityEngine.java:228) at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluate(DefaultVelocityEngine.java:187) at com.xpn.xwiki.render.XWikiVelocityRenderer.evaluate(XWikiVelocityRenderer.java:105) at com.xpn.xwiki.internal.template.DefaultPrivilegedTemplateRenderer.evaluate(DefaultPrivilegedTemplateRenderer.java:125) at com.xpn.xwiki.internal.template.DefaultPrivilegedTemplateRenderer.evaluateTemplate(DefaultPrivilegedTemplateRenderer.java:75) at com.xpn.xwiki.XWiki.evaluateTemplate(XWiki.java:1788) at com.xpn.xwiki.web.Utils.parseTemplate(Utils.java:151) at com.xpn.xwiki.web.XWikiAction.execute(XWikiAction.java:241) at com.xpn.xwiki.web.XWikiAction.execute(XWikiAction.java:116) at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:431) at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:236) at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196) at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414) at javax.servlet.http.HttpServlet.service(HttpServlet.java:707) at javax.servlet.http.HttpServlet.service(HttpServlet.java:820) at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:538) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1352) at com.xpn.xwiki.web.ActionFilter.doFilter(ActionFilter.java:120) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1323) at org.xwiki.wysiwyg.server.filter.ConversionFilter.doFilter(ConversionFilter.java:144) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1323) at com.xpn.xwiki.plugin.webdav.XWikiDavFilter.doFilter(XWikiDavFilter.java:66) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1323) at org.xwiki.container.servlet.filters.internal.SavedRequestRestorerFilter.doFilter(SavedRequestRestorerFilter.java:208) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1323) at org.xwiki.container.servlet.filters.internal.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:111) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1323) at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:476) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:119) at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:517) at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:225) at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:937) at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:406) at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:183) at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:871) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:117) at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:247) at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:149) at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:110) at org.eclipse.jetty.server.Server.handle(Server.java:346) at org.eclipse.jetty.server.HttpConnection.handleRequest(HttpConnection.java:589) at org.eclipse.jetty.server.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:1048) at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:601) at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:214) at org.eclipse.jetty.server.HttpConnection.handle(HttpConnection.java:411) at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:535) at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:40) at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:529) at java.lang.Thread.run(Thread.java:722) Caused by: org.apache.velocity.exception.MethodInvocationException: Invocation of method 'canCreateWorkspace' in class org.xwiki.workspace.internal.WorkspaceManagerScriptService threw exception java.lang.LinkageError: loader constraint violation: when resolving method "com.xpn.xwiki.plugin.wikimanager.WikiManagerPluginApi.<init>(Lcom/xpn/xwiki/plugin/wikimanager/WikiManagerPlugin;Lcom/xpn/xwiki/XWikiContext;)V" the class loader (instance of org/xwiki/classloader/NamespaceURLClassLoader) of the current class, com/xpn/xwiki/plugin/wikimanager/WikiManagerPlugin, and the class loader (instance of org/xwiki/classloader/NamespaceURLClassLoader) for resolved class, com/xpn/xwiki/plugin/wikimanager/WikiManagerPluginApi, have different Class objects for the type inApi.<init>(Lcom/xpn/xwiki/plugin/wikimanager/WikiManagerPlugin;Lcom/xpn/xwiki/XWikiContext;)V used in the signature at /templates/menuview.vm[line 54, column 23] at org.apache.velocity.runtime.parser.node.ASTMethod.handleInvocationException(ASTMethod.java:261) at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:187) at org.apache.velocity.runtime.parser.node.ASTReference.execute(ASTReference.java:280) at org.apache.velocity.runtime.parser.node.ASTReference.evaluate(ASTReference.java:530) at org.apache.velocity.runtime.parser.node.ASTAndNode.evaluate(ASTAndNode.java:106) at org.apache.velocity.runtime.parser.node.ASTAndNode.value(ASTAndNode.java:74) at org.apache.velocity.runtime.parser.node.ASTExpression.value(ASTExpression.java:71) at org.apache.velocity.runtime.parser.node.ASTSetDirective.render(ASTSetDirective.java:142) at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:72) at org.apache.velocity.runtime.parser.node.ASTIfStatement.render(ASTIfStatement.java:87) at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:342) at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluate(DefaultVelocityEngine.java:228) ... 99 more Caused by: java.lang.LinkageError: loader constraint violation: when resolving method "com.xpn.xwiki.plugin.wikimanager.WikiManagerPluginApi.<init>(Lcom/xpn/xwiki/plugin/wikimanager/WikiManagerPlugin;Lcom/xpn/xwiki/XWikiContext;)V" the class loader (instance of org/xwiki/classloader/NamespaceURLClassLoader) of the current class, com/xpn/xwiki/plugin/wikimanager/WikiManagerPlugin, and the class loader (instance of org/xwiki/classloader/NamespaceURLClassLoader) for resolved class, com/xpn/xwiki/plugin/wikimanager/WikiManagerPluginApi, have different Class objects for the type inApi.<init>(Lcom/xpn/xwiki/plugin/wikimanager/WikiManagerPlugin;Lcom/xpn/xwiki/XWikiContext;)V used in the signature at com.xpn.xwiki.plugin.wikimanager.WikiManagerPlugin.getPluginApi(WikiManagerPlugin.java:84) at com.xpn.xwiki.plugin.wikimanager.internal.WikiManagerScriptService.getAPI(WikiManagerScriptService.java:93) at com.xpn.xwiki.plugin.wikimanager.internal.WikiManagerScriptService.getWikiFromName(WikiManagerScriptService.java:159) at org.xwiki.workspace.internal.DefaultWorkspaceManager.getWorkspace(DefaultWorkspaceManager.java:487) at org.xwiki.workspace.internal.DefaultWorkspaceManager.isWorkspace(DefaultWorkspaceManager.java:604) at org.xwiki.workspace.internal.DefaultWorkspaceManager.canCreateWorkspace(DefaultWorkspaceManager.java:166) at org.xwiki.workspace.internal.WorkspaceManagerScriptService.canCreateWorkspace(WorkspaceManagerScriptService.java:94) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:601) at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.doInvoke(UberspectImpl.java:395) at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.invoke(UberspectImpl.java:384) at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:173) ... 109 more AFAIR from the last time, if you don`t restart the wiki after just installing workspaces, it is working fine. Once you restart, the classloader gets messed-up.
          Hide
          Thomas Mortagne added a comment -

          I did exactly what you listed but with release version of org.xwiki.platform:xwiki-platform-workspace-ui and it was working well after the restart. Will try with the SNAPSHOT next week but I don't understand what is the diffrence.

          Show
          Thomas Mortagne added a comment - I did exactly what you listed but with release version of org.xwiki.platform:xwiki-platform-workspace-ui and it was working well after the restart. Will try with the SNAPSHOT next week but I don't understand what is the diffrence.
          Hide
          Thomas Mortagne added a comment -

          OK I was able to reproduce it this time. The difference is that I tested on jetty/hsqldb distribution while I used to check on Tomcat. Going to be fun debugging this...

          Show
          Thomas Mortagne added a comment - OK I was able to reproduce it this time. The difference is that I tested on jetty/hsqldb distribution while I used to check on Tomcat. Going to be fun debugging this...
          Hide
          Thomas Mortagne added a comment -

          Was finally able to reproduce it on tomcat too after several restarts.

          Show
          Thomas Mortagne added a comment - Was finally able to reproduce it on tomcat too after several restarts.
          Hide
          Thomas Steinbach added a comment -

          Can't wait the 4.5.2 release. Spend about 12 hours on this bug over the last three days. Especially because this bug becomes active just after restart :V

          Thanx for fixing it, because at present there is no standard way to install a clean XWiki with workspace manager.

          Show
          Thomas Steinbach added a comment - Can't wait the 4.5.2 release. Spend about 12 hours on this bug over the last three days. Especially because this bug becomes active just after restart :V Thanx for fixing it, because at present there is no standard way to install a clean XWiki with workspace manager.
          Hide
          Thomas Mortagne added a comment -

          Well you could have done it the "old way" by putting the jars in WEB-INF/lib/

          Show
          Thomas Mortagne added a comment - Well you could have done it the "old way" by putting the jars in WEB-INF/lib/

            People

            • Assignee:
              Thomas Mortagne
              Reporter:
              Eduard Moraru
            • Votes:
              0 Vote for this issue
              Watchers:
              3 Start watching this issue

              Dates

              • Created:
                Updated:
                Resolved:
                Date of First Response: