Error Executing Custom Operation

[Lynn_]

Hi there,

I have followed the example for coding your first operation here: http://doc.nuxeo.com/display/public/NXDOC/Coding+your+first+operation

I have deployed the operation successfully to Studio and created an automation chain with the following steps:

Fetch -> Context Document(s)

Services -> RandomStringGenerator (my sample operation)

 Set the name value as MyRandomString

Document -> Update Properties

 Set the properties value as uid:uid=@{idValue} newsarticle:articleSummary=@{MyRandomString} and checked the save button

I then set up a user action to trigger this automation chain on the Document Edition Form, enabled for my NewsArticle type and deployed this to my platform instance.

However, when I click this button from the edit form, I get the following error:

Context

Request Attributes:

com.sun.faces.util.RequestStateManager : {com.sun.faces.renderKitImplForRequest=org.ajax4jsf.renderkit.ChameleonRenderKitFactory@7eb8810d, com.sun.faces.ComponentForValue=org.nuxeo.ecm.platform.ui.web.component.holder.UIValueHolder@77e800ab, com.sun.faces.INVOCATION_PATH=.faces, com.sun.faces.ExternalContextImpl=com.sun.faces.context.ExternalContextImpl@2084180d}
nuxeo.disable.redirect.wrapper : true
org.jboss.seam.core.conversationPropagation : org.jboss.seam.core.ConversationPropagation@40470e28
org.richfaces.component.DecodesPhaseNotifiyingListener:_AFTER_DECODE_PHASE : true
actionManager : org.nuxeo.ecm.platform.actions.ActionService@78f2850f
messageBundle : java.util.PropertyResourceBundle@79fdd9d1
org.jboss.seam.core.manager : Manager([0NXMAIN2])
operationActionBean : org.nuxeo.ecm.automation.jsf.OperationActionBean@8e766e9
org.ajax4jsf.application.AjaxStateManager.AJAX_VIEW_SEQUENCE : j_id51
stackTrace : javax.servlet.ServletException: On requestURL: http://localhost:8080/nuxeo/view_documents.faces
	at org.nuxeo.ecm.platform.ui.web.rest.FancyURLFilter.doFilter(FancyURLFilter.java:145)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
	at org.nuxeo.ecm.webdav.service.WIRequestFilter.doFilter(WIRequestFilter.java:60)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
	at org.nuxeo.ecm.platform.web.common.requestcontroller.filter.NuxeoRequestControllerFilter.doFilter(NuxeoRequestControllerFilter.java:145)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
	at org.nuxeo.ecm.platform.ui.web.auth.NuxeoAuthenticationFilter.doFilterInternal(NuxeoAuthenticationFilter.java:614)
	at org.nuxeo.ecm.platform.ui.web.auth.service.NuxeoAuthFilterChain.doFilter(NuxeoAuthFilterChain.java:35)
	at org.nuxeo.ecm.platform.ui.web.auth.oauth2.NuxeoOAuth2Filter.doFilter(NuxeoOAuth2Filter.java:68)
	at org.nuxeo.ecm.platform.ui.web.auth.service.NuxeoAuthFilterChain.doFilter(NuxeoAuthFilterChain.java:33)
	at org.nuxeo.ecm.platform.ui.web.auth.oauth.NuxeoOAuthFilter.doFilter(NuxeoOAuthFilter.java:119)
	at org.nuxeo.ecm.platform.ui.web.auth.service.NuxeoAuthFilterChain.doFilter(NuxeoAuthFilterChain.java:33)
	at org.nuxeo.ecm.platform.ui.web.auth.NuxeoAuthenticationFilter.doFilter(NuxeoAuthenticationFilter.java:410)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
	at org.nuxeo.ecm.platform.web.common.requestcontroller.filter.NuxeoCorsFilter.doFilter(NuxeoCorsFilter.java:51)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
	at org.nuxeo.ecm.platform.web.common.exceptionhandling.NuxeoExceptionFilter.doFilter(NuxeoExceptionFilter.java:79)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
	at org.nuxeo.ecm.platform.web.common.encoding.NuxeoEncodingFilter.doFilter(NuxeoEncodingFilter.java:69)
	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 org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
	at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1023)
	at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
	at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
	at java.lang.Thread.run(Unknown Source)
Caused by: javax.servlet.ServletException: #{action.getLink()}: javax.el.ELException: java.lang.NullPointerException
	at javax.faces.webapp.FacesServlet.service(FacesServlet.java:277)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
	at org.nuxeo.wss.servlet.BaseWSSFilter.doFilter(BaseWSSFilter.java:137)
	at org.nuxeo.wss.servlet.FailSafeWSSFilter.doFilter(FailSafeWSSFilter.java:55)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
	at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:83)
	at org.nuxeo.ecm.platform.ui.web.multipart.MultipartFilter.doFilter(MultipartFilter.java:70)
	at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
	at org.jboss.seam.web.ExceptionFilter.doFilter(ExceptionFilter.java:64)
	at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
	at org.jboss.seam.web.RedirectFilter.doFilter(RedirectFilter.java:45)
	at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
	at org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:178)
	at org.ajax4jsf.webapp.BaseFilter.handleRequest(BaseFilter.java:290)
	at org.ajax4jsf.webapp.BaseFilter.processUploadsAndHandleRequest(BaseFilter.java:368)
	at org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:495)
	at org.jboss.seam.web.Ajax4jsfFilter.doFilter(Ajax4jsfFilter.java:56)
	at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
	at org.jboss.seam.servlet.SeamFilter.doFilter(SeamFilter.java:158)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
	at org.nuxeo.ecm.core.management.jtajca.internal.Log4jWebFilter.doFilter(Log4jWebFilter.java:64)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
	at org.nuxeo.ecm.platform.ui.web.rest.FancyURLFilter.doFilter(FancyURLFilter.java:129)
	... 39 more
Caused by: javax.faces.FacesException: #{action.getLink()}: javax.el.ELException: java.lang.NullPointerException
	at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:118)
	at javax.faces.component.UICommand.broadcast(UICommand.java:387)
	at org.nuxeo.ecm.platform.ui.web.binding.alias.UIAliasHolder.broadcast(UIAliasHolder.java:86)
	at org.nuxeo.ecm.platform.ui.web.binding.alias.UIAliasHolder.broadcast(UIAliasHolder.java:86)
	at org.nuxeo.ecm.platform.ui.web.binding.alias.UIAliasHolder.broadcast(UIAliasHolder.java:86)
	at org.nuxeo.ecm.platform.ui.web.binding.alias.UIAliasHolder.broadcast(UIAliasHolder.java:86)
	at org.nuxeo.ecm.platform.ui.web.binding.alias.UIAliasHolder.broadcast(UIAliasHolder.java:86)
	at org.nuxeo.ecm.platform.ui.web.binding.alias.UIAliasHolder.broadcast(UIAliasHolder.java:86)
	at org.nuxeo.ecm.platform.ui.web.component.holder.UIValueHolder.broadcast(UIValueHolder.java:83)
	at org.nuxeo.ecm.platform.ui.web.binding.alias.UIAliasHolder.broadcast(UIAliasHolder.java:86)
	at org.nuxeo.ecm.platform.ui.web.binding.alias.UIAliasHolder.broadcast(UIAliasHolder.java:86)
	at org.nuxeo.ecm.platform.ui.web.binding.alias.UIAliasHolder.broadcast(UIAliasHolder.java:86)
	at org.nuxeo.ecm.platform.ui.web.binding.alias.UIAliasHolder.broadcast(UIAliasHolder.java:86)
	at org.nuxeo.ecm.platform.ui.web.binding.alias.UIAliasHolder.broadcast(UIAliasHolder.java:86)
	at org.nuxeo.ecm.platform.ui.web.binding.alias.UIAliasHolder.broadcast(UIAliasHolder.java:86)
	at org.nuxeo.ecm.platform.ui.web.binding.alias.UIAliasHolder.broadcast(UIAliasHolder.java:86)
	at org.nuxeo.ecm.platform.ui.web.binding.alias.UIAliasHolder.broadcast(UIAliasHolder.java:86)
	at org.nuxeo.ecm.platform.ui.web.component.holder.UIValueHolder.broadcast(UIValueHolder.java:83)
	at org.nuxeo.ecm.platform.ui.web.binding.alias.UIAliasHolder.broadcast(UIAliasHolder.java:86)
	at org.nuxeo.ecm.platform.ui.web.binding.alias.UIAliasHolder.broadcast(UIAliasHolder.java:86)
	at org.nuxeo.ecm.platform.ui.web.binding.alias.UIAliasHolder.broadcast(UIAliasHolder.java:86)
	at org.ajax4jsf.component.AjaxViewRoot.processEvents(AjaxViewRoot.java:321)
	at org.ajax4jsf.component.AjaxViewRoot.broadcastEvents(AjaxViewRoot.java:296)
	at org.ajax4jsf.component.AjaxViewRoot.processPhase(AjaxViewRoot.java:253)
	at org.ajax4jsf.component.AjaxViewRoot.processApplication(AjaxViewRoot.java:466)
	at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:82)
	at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:100)
	at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118)
	at org.nuxeo.ecm.platform.ui.web.lifecycle.NuxeoLifeCycleImpl.execute(NuxeoLifeCycleImpl.java:83)
	at javax.faces.webapp.FacesServlet.service(FacesServlet.java:265)
	... 65 more
Caused by: javax.faces.el.EvaluationException: javax.el.ELException: java.lang.NullPointerException
	at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:102)
	at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:102)
	... 94 more
Caused by: javax.el.ELException: java.lang.NullPointerException
	at org.jboss.el.util.ReflectionUtil.invokeMethod(ReflectionUtil.java:333)
	at org.jboss.el.util.ReflectionUtil.invokeMethod(ReflectionUtil.java:274)
	at org.jboss.el.parser.AstMethodSuffix.getValue(AstMethodSuffix.java:59)
	at org.jboss.el.parser.AstMethodSuffix.invoke(AstMethodSuffix.java:65)
	at org.jboss.el.parser.AstValue.invoke(AstValue.java:96)
	at org.jboss.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:276)
	at org.nuxeo.ecm.platform.ui.web.binding.MetaMethodExpression.invoke(MetaMethodExpression.java:124)
	at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:88)
	... 95 more
Caused by: java.lang.NullPointerException
	at org.nuxeo.ecm.automation.core.trace.BasedTracer.getFormattedText(BasedTracer.java:114)
	at org.nuxeo.ecm.automation.TraceException.<init>(TraceException.java:32)
	at org.nuxeo.ecm.automation.core.impl.OperationServiceImpl.run(OperationServiceImpl.java:195)
	at org.nuxeo.ecm.automation.core.impl.OperationServiceImpl.run(OperationServiceImpl.java:89)
	at org.nuxeo.ecm.automation.jsf.OperationActionBean.runOperation(OperationActionBean.java:88)
	at org.nuxeo.ecm.automation.jsf.OperationActionBean.doOperation(OperationActionBean.java:62)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at org.jboss.seam.util.Reflections.invoke(Reflections.java:22)
	at org.jboss.seam.intercept.RootInvocationContext.proceed(RootInvocationContext.java:31)
	at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:56)
	at org.jboss.seam.transaction.RollbackInterceptor.aroundInvoke(RollbackInterceptor.java:28)
	at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
	at org.jboss.seam.core.BijectionInterceptor.aroundInvoke(BijectionInterceptor.java:68)
	at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
	at org.nuxeo.ecm.platform.ui.web.util.NuxeoExceptionInterceptor.aroundInvoke(NuxeoExceptionInterceptor.java:79)
	at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
	at org.jboss.seam.core.MethodContextInterceptor.aroundInvoke(MethodContextInterceptor.java:44)
	at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
	at org.jboss.seam.intercept.RootInterceptor.invoke(RootInterceptor.java:107)
	at org.jboss.seam.intercept.JavaBeanInterceptor.interceptInvocation(JavaBeanInterceptor.java:166)
	at org.jboss.seam.intercept.JavaBeanInterceptor.invoke(JavaBeanInterceptor.java:102)
	at org.nuxeo.ecm.automation.jsf.OperationActionBean_$$_javassist_80.doOperation(OperationActionBean_$$_javassist_80.java)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at org.jboss.el.util.ReflectionUtil.invokeMethod(ReflectionUtil.java:329)
	... 102 more

currentServerLocation : org.nuxeo.ecm.platform.util.RepositoryLocation@5c13d641
user_message : An unexpected error occurred. Click on the following links to get more information or go back to the application.
NuxeoExceptionHandlerMarker : true
currentDocument : DocumentModelImpl(b3f7e4d2-f0e2-4ba8-ba1f-71970741be99, path=/default-domain/Specifications-news-API, title=Specifications-news-API)
org.jboss.seam.transaction.transaction : org.jboss.seam.transaction.Transaction@10154f90
securityError : false
org.jboss.seam.transaction.synchronizations : org.jboss.seam.transaction.SeSynchronizations@671a7f2f
org.jboss.seam.faces.validation : org.jboss.seam.faces.Validation@7c941b8a
org.jboss.seam.web.requestContextPath : /nuxeo
org.jboss.seam.web.servletContexts : org.jboss.seam.web.ServletContexts@5f9c40eb
org.jboss.seam.core.events : org.jboss.seam.core.Events@b6a3557
org.jboss.seam.web.requestServletPath : /view_documents.faces
org.nuxeo.ecm.platform.ui.web.binding.alias.AliasVariableMapper_MARKER : {}

Please can you advise what may be going wrong?

Thanks, Lynn

[Vladimir_Pasqui]

Hi,

[Lynn_]

Hi Vladimir,

[ThibArg_ · Accepted solution]

The problem was related to the fact that the id of the automation chain was the same as the id of the operaiton called in the automation chain: RandomStringGenerator. Internally, Nuxeo handles an Automation Chain the same way it handles a single operation. So, when the chain called the operation, nuxeo actually called the chain again, leading to the error. Renaming the automation chain solved the issue.

[Édouard_Mercier]

Thank you for the troubleshooting and the trick: it saved my night!