can't select user in reassign window

[kenjiang]

Thank you for your reply in advance.


I can't select other user in reassign window.when I type Foz..,there are not user list show and I can "select myself" only but other function in explore is work well.

um ..I use below diff. platform to test.
activiti version is 5.13
OS is windows7/Linux
Tomcat server is 6/7

but in other  windows Xp,i can select the user..

Do you have any hints?

Does it use rest API to get user list,could you provide the url for me to test the rest api is work or not.

I am not sure is it caused by below issue,Do you have example for me to add in  catalina.sh because I also try it and seems still not work

Due to default security properties on Tomcat, escaped forward slashes (%2F and %5C) are not allowed by default (400-result is returned). This may have an impact on the deployment resources and their data-URL, as the URL can potentially contain escaped forward slashes. When issues are experienced with unexpected 400-results, set the following system-property: -Dorg.apache.tomcat.util.buf.UDecoder.ALLOW_ENCODED_SLASH=true.

[frederikherema1]

No, explorer does not use REST at all, it leverages the VAADIN comunication to call the Java-API directly on the server. DO you see any stack traces when you search for users, in the tomcat log?

[george1sotiropo]

You must type the first 2 letters of users' surname. Below is the code of org.activiti.explorer.ui.custom.SelectUsersPopupWindow

protected void searchPeople(String searchText) {
………..
      List<User> results = ProcessEngines.getDefaultProcessEngine()
              .getIdentityService()
              .createUserQuery()
              .userFullNameLike("%" + searchText + "%")
              .list();
…….}

[george1sotiropo]

or users' first name. Does the same thing


Regards

[pbhat]

I cant choose fozzie or gronzie even in new process start-up for the Sample Approval Process.
I am posting this messenger here because I dont see any where here how to post new thread.
Please let me know answer to both.
I renamed the rtf as .txt I could not upload anything other than .txt. See if you can rename it to .rtf and see my screen shot.
Otherwise email me and we can do screen share session and I can show the issue.
Thanks

[martagan]

I have the same error :

com.vaadin.event.ListenerMethod$MethodException: Invocation of method buttonClick in org.activiti.explorer.ui.custom.SelectUsersPopupWindow$6 failed.
at com.vaadin.event.ListenerMethod.receiveEvent(ListenerMethod.java:530)
at com.vaadin.event.EventRouter.fireEvent(EventRouter.java:164)
at com.vaadin.ui.AbstractComponent.fireEvent(AbstractComponent.java:1219)
at com.vaadin.ui.Button.fireClick(Button.java:567)
at com.vaadin.ui.Button.changeVariables(Button.java:223)
at com.vaadin.terminal.gwt.server.AbstractCommunicationManager.changeVariables(AbstractCommunicationManager.java:1460)
at com.vaadin.terminal.gwt.server.AbstractCommunicationManager.handleVariableBurst(AbstractCommunicationManager.java:1404)
at com.vaadin.terminal.gwt.server.AbstractCommunicationManager.handleVariables(AbstractCommunicationManager.java:1329)
at com.vaadin.terminal.gwt.server.AbstractCommunicationManager.doHandleUidlRequest(AbstractCommunicationManager.java:761)
at com.vaadin.terminal.gwt.server.CommunicationManager.handleUidlRequest(CommunicationManager.java:325)
at com.vaadin.terminal.gwt.server.AbstractApplicationServlet.service(AbstractApplicationServlet.java:501)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.activiti.explorer.filter.ExplorerFilter.doFilter(ExplorerFilter.java:44)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
at com.googlecode.psiprobe.Tomcat70AgentValve.invoke(Tomcat70AgentValve.java:38)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
at org.apache.coyote.ajp.AjpProcessor.process(AjpProcessor.java:200)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:724)
Caused by: com.vaadin.event.ListenerMethod$MethodException: Invocation of method componentEvent in org.activiti.explorer.ui.task.listener.ReassignAssigneeListener$1 failed.
at com.vaadin.event.ListenerMethod.receiveEvent(ListenerMethod.java:530)
at com.vaadin.event.EventRouter.fireEvent(EventRouter.java:164)
at com.vaadin.ui.AbstractComponent.fireEvent(AbstractComponent.java:1219)
at org.activiti.explorer.ui.custom.SelectUsersPopupWindow.access$200(SelectUsersPopupWindow.java:61)
at org.activiti.explorer.ui.custom.SelectUsersPopupWindow$6.buttonClick(SelectUsersPopupWindow.java:344)
at sun.reflect.GeneratedMethodAccessor327.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at com.vaadin.event.ListenerMethod.receiveEvent(ListenerMethod.java:510)
… 31 more
Caused by: org.activiti.engine.ActivitiIllegalArgumentException: Provided id is null
at org.activiti.engine.impl.UserQueryImpl.userId(UserQueryImpl.java:55)
at org.activiti.explorer.ui.task.TaskEventTextResolver.resolveText(TaskEventTextResolver.java:60)
at org.activiti.explorer.ui.task.TaskEventsPanel.addTaskEventText(TaskEventsPanel.java:163)
at org.activiti.explorer.ui.task.TaskEventsPanel.addTaskEvents(TaskEventsPanel.java:128)
at org.activiti.explorer.ui.task.TaskEventsPanel.refreshTaskEvents(TaskEventsPanel.java:93)
at org.activiti.explorer.ui.task.TaskDetailPanel.notifyAssigneeChanged(TaskDetailPanel.java:397)
at org.activiti.explorer.ui.task.listener.ReassignAssigneeListener$1.submitted(ReassignAssigneeListener.java:67)
at org.activiti.explorer.ui.event.SubmitEventListener.componentEvent(SubmitEventListener.java:34)
at sun.reflect.GeneratedMethodAccessor386.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at com.vaadin.event.ListenerMethod.receiveEvent(ListenerMethod.java:510)
… 39 more

nov. 01, 2013 11:09:31 AM com.vaadin.Application terminalError
SEVERE: Terminal error:
com.vaadin.event.ListenerMethod$MethodException: Invocation of method fragmentChanged in org.activiti.explorer.navigation.NavigationFragmentChangeListener failed.
at com.vaadin.event.ListenerMethod.receiveEvent(ListenerMethod.java:530)
at com.vaadin.event.EventRouter.fireEvent(EventRouter.java:164)
at com.vaadin.ui.AbstractComponent.fireEvent(AbstractComponent.java:1219)
at com.vaadin.ui.UriFragmentUtility.changeVariables(UriFragmentUtility.java:114)
at com.vaadin.terminal.gwt.server.AbstractCommunicationManager.changeVariables(AbstractCommunicationManager.java:1460)
at com.vaadin.terminal.gwt.server.AbstractCommunicationManager.handleVariableBurst(AbstractCommunicationManager.java:1404)
at com.vaadin.terminal.gwt.server.AbstractCommunicationManager.handleVariables(AbstractCommunicationManager.java:1329)
at com.vaadin.terminal.gwt.server.AbstractCommunicationManager.doHandleUidlRequest(AbstractCommunicationManager.java:761)
at com.vaadin.terminal.gwt.server.CommunicationManager.handleUidlRequest(CommunicationManager.java:325)
at com.vaadin.terminal.gwt.server.AbstractApplicationServlet.service(AbstractApplicationServlet.java:501)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.activiti.explorer.filter.ExplorerFilter.doFilter(ExplorerFilter.java:44)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
at com.googlecode.psiprobe.Tomcat70AgentValve.invoke(Tomcat70AgentValve.java:38)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
at org.apache.coyote.ajp.AjpProcessor.process(AjpProcessor.java:200)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:724)
Caused by: com.vaadin.event.ListenerMethod$MethodException: Invocation of method valueChange in org.activiti.explorer.ui.task.TaskPage$1 failed.
at com.vaadin.event.ListenerMethod.receiveEvent(ListenerMethod.java:530)
at com.vaadin.event.EventRouter.fireEvent(EventRouter.java:164)
at com.vaadin.ui.AbstractComponent.fireEvent(AbstractComponent.java:1219)
at com.vaadin.ui.AbstractField.fireValueChange(AbstractField.java:897)
at com.vaadin.ui.AbstractField.setValue(AbstractField.java:529)
at com.vaadin.ui.AbstractSelect.setValue(AbstractSelect.java:676)
at com.vaadin.ui.AbstractSelect.setValue(AbstractSelect.java:645)
at com.vaadin.ui.Table.setValue(Table.java:3572)
at com.vaadin.ui.AbstractSelect.select(AbstractSelect.java:1422)
at org.activiti.explorer.ui.AbstractTablePage.selectElement(AbstractTablePage.java:81)
at org.activiti.explorer.ui.task.TaskPage.initUi(TaskPage.java:73)
at org.activiti.explorer.ui.AbstractPage.attach(AbstractPage.java:43)
at com.vaadin.ui.AbstractComponent.setParent(AbstractComponent.java:560)
at com.vaadin.ui.AbstractComponentContainer.addComponent(AbstractComponentContainer.java:211)
at com.vaadin.ui.CssLayout.addComponent(CssLayout.java:95)
at org.activiti.explorer.ui.mainlayout.MainLayout.setMainContent(MainLayout.java:58)
at org.activiti.explorer.ui.MainWindow.switchView(MainWindow.java:79)
at org.activiti.explorer.DefaultViewManager.switchView(DefaultViewManager.java:342)
at org.activiti.explorer.DefaultViewManager.showTasksPage(DefaultViewManager.java:168)
at org.activiti.explorer.navigation.TaskNavigator.directToSpecificTaskPage(TaskNavigator.java:96)
at org.activiti.explorer.navigation.TaskNavigator.handleNavigation(TaskNavigator.java:67)
at org.activiti.explorer.navigation.NavigationFragmentChangeListener.fragmentChanged(NavigationFragmentChangeListener.java:54)
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:606)
at com.vaadin.event.ListenerMethod.receiveEvent(ListenerMethod.java:510)
… 30 more
Caused by: org.activiti.engine.ActivitiIllegalArgumentException: Provided id is null
at org.activiti.engine.impl.UserQueryImpl.userId(UserQueryImpl.java:55)
at org.activiti.explorer.ui.task.TaskEventTextResolver.resolveText(TaskEventTextResolver.java:60)
at org.activiti.explorer.ui.task.TaskEventsPanel.addTaskEventText(TaskEventsPanel.java:163)
at org.activiti.explorer.ui.task.TaskEventsPanel.addTaskEvents(TaskEventsPanel.java:128)
at org.activiti.explorer.ui.task.TaskEventsPanel.refreshTaskEvents(TaskEventsPanel.java:93)
at org.activiti.explorer.ui.task.TaskEventsPanel.setTaskId(TaskEventsPanel.java:102)
at org.activiti.explorer.ui.task.TaskPage.createDetailComponent(TaskPage.java:133)
at org.activiti.explorer.ui.task.TaskPage$1.valueChange(TaskPage.java:117)
at sun.reflect.GeneratedMethodAccessor283.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at com.vaadin.event.ListenerMethod.receiveEvent(ListenerMethod.java:510)
… 56 more

nov. 01, 2013 11:11:40 AM com.vaadin.Application terminalError
SEVERE: Terminal error:
com.vaadin.event.ListenerMethod$MethodException: Invocation of method buttonClick in org.activiti.explorer.ui.custom.SelectUsersPopupWindow$3 failed.
at com.vaadin.event.ListenerMethod.receiveEvent(ListenerMethod.java:530)
at com.vaadin.event.EventRouter.fireEvent(EventRouter.java:164)
at com.vaadin.ui.AbstractComponent.fireEvent(AbstractComponent.java:1219)
at com.vaadin.ui.Button.fireClick(Button.java:567)
at com.vaadin.ui.Button.changeVariables(Button.java:223)
at com.vaadin.terminal.gwt.server.AbstractCommunicationManager.changeVariables(AbstractCommunicationManager.java:1460)
at com.vaadin.terminal.gwt.server.AbstractCommunicationManager.handleVariableBurst(AbstractCommunicationManager.java:1404)
at com.vaadin.terminal.gwt.server.AbstractCommunicationManager.handleVariables(AbstractCommunicationManager.java:1329)
at com.vaadin.terminal.gwt.server.AbstractCommunicationManager.doHandleUidlRequest(AbstractCommunicationManager.java:761)
at com.vaadin.terminal.gwt.server.CommunicationManager.handleUidlRequest(CommunicationManager.java:325)
at com.vaadin.terminal.gwt.server.AbstractApplicationServlet.service(AbstractApplicationServlet.java:501)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.activiti.explorer.filter.ExplorerFilter.doFilter(ExplorerFilter.java:44)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
at com.googlecode.psiprobe.Tomcat70AgentValve.invoke(Tomcat70AgentValve.java:38)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
at org.apache.coyote.ajp.AjpProcessor.process(AjpProcessor.java:200)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:724)
Caused by: com.vaadin.event.ListenerMethod$MethodException: Invocation of method componentEvent in org.activiti.explorer.ui.task.listener.ReassignAssigneeListener$1 failed.
at com.vaadin.event.ListenerMethod.receiveEvent(ListenerMethod.java:530)
at com.vaadin.event.EventRouter.fireEvent(EventRouter.java:164)
at com.vaadin.ui.AbstractComponent.fireEvent(AbstractComponent.java:1219)
at org.activiti.explorer.ui.custom.SelectUsersPopupWindow.access$000(SelectUsersPopupWindow.java:61)
at org.activiti.explorer.ui.custom.SelectUsersPopupWindow$3.buttonClick(SelectUsersPopupWindow.java:168)
at sun.reflect.GeneratedMethodAccessor327.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at com.vaadin.event.ListenerMethod.receiveEvent(ListenerMethod.java:510)
… 31 more
Caused by: org.activiti.engine.ActivitiIllegalArgumentException: Provided id is null
at org.activiti.engine.impl.UserQueryImpl.userId(UserQueryImpl.java:55)
at org.activiti.explorer.ui.task.TaskEventTextResolver.resolveText(TaskEventTextResolver.java:60)
at org.activiti.explorer.ui.task.TaskEventsPanel.addTaskEventText(TaskEventsPanel.java:163)
at org.activiti.explorer.ui.task.TaskEventsPanel.addTaskEvents(TaskEventsPanel.java:128)
at org.activiti.explorer.ui.task.TaskEventsPanel.refreshTaskEvents(TaskEventsPanel.java:93)
at org.activiti.explorer.ui.task.TaskDetailPanel.notifyAssigneeChanged(TaskDetailPanel.java:397)
at org.activiti.explorer.ui.task.listener.ReassignAssigneeListener$1.submitted(ReassignAssigneeListener.java:67)
at org.activiti.explorer.ui.event.SubmitEventListener.componentEvent(SubmitEventListener.java:34)
at sun.reflect.GeneratedMethodAccessor386.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at com.vaadin.event.ListenerMethod.receiveEvent(ListenerMethod.java:510)
… 39 more

[martagan]

Similar error in Events window :

com.vaadin.event.ListenerMethod$MethodException: Invocation of method buttonClick in org.activiti.explorer.ui.task.TaskEventsPanel$3 failed.
at com.vaadin.event.ListenerMethod.receiveEvent(ListenerMethod.java:530)
at com.vaadin.event.EventRouter.fireEvent(EventRouter.java:164)
at com.vaadin.ui.AbstractComponent.fireEvent(AbstractComponent.java:1219)
at com.vaadin.ui.Button.fireClick(Button.java:567)
at com.vaadin.ui.Button.changeVariables(Button.java:223)
at com.vaadin.terminal.gwt.server.AbstractCommunicationManager.changeVariables(AbstractCommunicationManager.java:1460)
at com.vaadin.terminal.gwt.server.AbstractCommunicationManager.handleVariableBurst(AbstractCommunicationManager.java:1404)
at com.vaadin.terminal.gwt.server.AbstractCommunicationManager.handleVariables(AbstractCommunicationManager.java:1329)
at com.vaadin.terminal.gwt.server.AbstractCommunicationManager.doHandleUidlRequest(AbstractCommunicationManager.java:761)
at com.vaadin.terminal.gwt.server.CommunicationManager.handleUidlRequest(CommunicationManager.java:325)
at com.vaadin.terminal.gwt.server.AbstractApplicationServlet.service(AbstractApplicationServlet.java:501)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.activiti.explorer.filter.ExplorerFilter.doFilter(ExplorerFilter.java:44)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
at com.googlecode.psiprobe.Tomcat70AgentValve.invoke(Tomcat70AgentValve.java:38)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
at org.apache.coyote.ajp.AjpProcessor.process(AjpProcessor.java:200)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:724)
Caused by: org.activiti.engine.ActivitiIllegalArgumentException: Provided id is null
at org.activiti.engine.impl.UserQueryImpl.userId(UserQueryImpl.java:55)
at org.activiti.explorer.ui.task.TaskEventTextResolver.resolveText(TaskEventTextResolver.java:60)
at org.activiti.explorer.ui.task.TaskEventsPanel.addTaskEventText(TaskEventsPanel.java:163)
at org.activiti.explorer.ui.task.TaskEventsPanel.addTaskEvents(TaskEventsPanel.java:128)
at org.activiti.explorer.ui.task.TaskEventsPanel.refreshTaskEvents(TaskEventsPanel.java:93)
at org.activiti.explorer.ui.task.TaskEventsPanel.addNewComment(TaskEventsPanel.java:214)
at org.activiti.explorer.ui.task.TaskEventsPanel$3.buttonClick(TaskEventsPanel.java:207)
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:606)
at com.vaadin.event.ListenerMethod.receiveEvent(ListenerMethod.java:510)
… 31 more

[martagan]

Similar error in Events window :

com.vaadin.event.ListenerMethod$MethodException: Invocation of method buttonClick in org.activiti.explorer.ui.task.TaskEventsPanel$3 failed.
at com.vaadin.event.ListenerMethod.receiveEvent(ListenerMethod.java:530)
at com.vaadin.event.EventRouter.fireEvent(EventRouter.java:164)
at com.vaadin.ui.AbstractComponent.fireEvent(AbstractComponent.java:1219)
at com.vaadin.ui.Button.fireClick(Button.java:567)
at com.vaadin.ui.Button.changeVariables(Button.java:223)
at com.vaadin.terminal.gwt.server.AbstractCommunicationManager.changeVariables(AbstractCommunicationManager.java:1460)
at com.vaadin.terminal.gwt.server.AbstractCommunicationManager.handleVariableBurst(AbstractCommunicationManager.java:1404)
at com.vaadin.terminal.gwt.server.AbstractCommunicationManager.handleVariables(AbstractCommunicationManager.java:1329)
at com.vaadin.terminal.gwt.server.AbstractCommunicationManager.doHandleUidlRequest(AbstractCommunicationManager.java:761)
at com.vaadin.terminal.gwt.server.CommunicationManager.handleUidlRequest(CommunicationManager.java:325)
at com.vaadin.terminal.gwt.server.AbstractApplicationServlet.service(AbstractApplicationServlet.java:501)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.activiti.explorer.filter.ExplorerFilter.doFilter(ExplorerFilter.java:44)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
at com.googlecode.psiprobe.Tomcat70AgentValve.invoke(Tomcat70AgentValve.java:38)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
at org.apache.coyote.ajp.AjpProcessor.process(AjpProcessor.java:200)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:724)
Caused by: org.activiti.engine.ActivitiIllegalArgumentException: Provided id is null
at org.activiti.engine.impl.UserQueryImpl.userId(UserQueryImpl.java:55)
at org.activiti.explorer.ui.task.TaskEventTextResolver.resolveText(TaskEventTextResolver.java:60)
at org.activiti.explorer.ui.task.TaskEventsPanel.addTaskEventText(TaskEventsPanel.java:163)
at org.activiti.explorer.ui.task.TaskEventsPanel.addTaskEvents(TaskEventsPanel.java:128)
at org.activiti.explorer.ui.task.TaskEventsPanel.refreshTaskEvents(TaskEventsPanel.java:93)
at org.activiti.explorer.ui.task.TaskEventsPanel.addNewComment(TaskEventsPanel.java:214)
at org.activiti.explorer.ui.task.TaskEventsPanel$3.buttonClick(TaskEventsPanel.java:207)
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:606)
at com.vaadin.event.ListenerMethod.receiveEvent(ListenerMethod.java:510)
… 31 more

[pbhat]

Cant assign or reassign for any process in 5.14. Is something seriously broken as assigning tasks to other users is core functionality of BPM. I am trying to do a prototype to use Activiti in production; but if such as major functionality is broken it is hard to convince stake holders. Please suggest work around or provide fix soon. Others are reporting similar issue. Should  we try a previous version? If so which one?
Thanks,
Prakash

Stack trace:

[pbhat]

As mentioned by others
You must type the first 2 letters of users' surname or last name. Or typing %% gets every one. Case sensitive.
my Issue resolved.
Thanks