Description of problem:
I think I know how to reproduce it now.

• Open the process instance list. Click on process details. Now, clime on process model from the View. That opens up the model on the left side. My process instance is so big, I can’t see that in that small little area I have.
  I chose to remove the process details window by clicking on the ‘X’… Now,… boom, I see all the below exceptions and the view disappears. It looks like it is trying to reload the designer in the resided window…

Another thing is, there is no way to zoom in or zoom out in the process instance view here. When models are quite big, if I trying to zoom out to see more of the diagram it is not possible. I know in the original designer you have that.
At least you guys should consider an option to save that view into PDF… that helps users to review off-line. It is ugly.. but some work around is relieving.

On Oct 29, 2013, at 3:51 PM, Prakash Aradhya <paradhya@redhat.com> wrote:

Guys,
I don’t know who owns this and if you have a ticket open for this. It is getting really annoying that I can’t consistently see the process model view when I open it form jBPM console…
Most of the times it fails… works once in a while.. I get the following error…Do you know this issue ?

15:47:32,045 INFO [org.jbpm.designer.server.EditorHandler] (http-/127.0.0.1:8080-1) Performing diagram information pre-processing steps.
15:47:32,051 ERROR [org.jbpm.designer.web.preprocessing.impl.JbpmPreprocessingUnit] (http-/127.0.0.1:8080-1) Failed to setup workitems : Repository with alias dummy not found
15:47:37,155 INFO [org.jbpm.designer.web.server.DictionaryServlet] (http-/127.0.0.1:8080-1) Unable to find existing dictionary information.
15:47:59,834 INFO [org.jbpm.designer.server.EditorHandler] (http-/127.0.0.1:8080-2) Performing diagram information pre-processing steps.
15:47:59,857 ERROR [org.jbpm.designer.web.preprocessing.impl.JbpmPreprocessingUnit] (http-/127.0.0.1:8080-2) Failed to setup workitems : Repository with alias dummy not found
15:48:00,314 ERROR [org.apache.catalina.core.ContainerBase.[jboss.web].[default-host].[/business-central].[UUIDBasedRepositoryServlet]] (http-/127.0.0.1:8080-2) JBWEB000236: Servlet.service() for servlet UUIDBasedRepositoryServlet threw exception: javax.enterprise.event.ObserverException
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) [classes.jar:1.6.0_65]
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39) [classes.jar:1.6.0_65]
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27) [classes.jar:1.6.0_65]
at java.lang.reflect.Constructor.newInstance(Constructor.java:513) [classes.jar:1.6.0_65]
at java.lang.Class.newInstance0(Class.java:357) [classes.jar:1.6.0_65]
at java.lang.Class.newInstance(Class.java:310) [classes.jar:1.6.0_65]
at org.jboss.weld.util.reflection.SecureReflections$16.work(SecureReflections.java:344) [weld-core-1.1.13.Final-redhat-1.jar:1.1.13.Final-redhat-1]
at org.jboss.weld.util.reflection.SecureReflectionAccess.run(SecureReflectionAccess.java:52) [weld-core-1.1.13.Final-redhat-1.jar:1.1.13.Final-redhat-1]
at org.jboss.weld.util.reflection.SecureReflectionAccess.runAsInstantiation(SecureReflectionAccess.java:173) [weld-core-1.1.13.Final-redhat-1.jar:1.1.13.Final-redhat-1]
at org.jboss.weld.util.reflection.SecureReflections.newInstance(SecureReflections.java:341) [weld-core-1.1.13.Final-redhat-1.jar:1.1.13.Final-redhat-1]
at org.jboss.weld.injection.Exceptions.rethrowException(Exceptions.java:33) [weld-core-1.1.13.Final-redhat-1.jar:1.1.13.Final-redhat-1]
at org.jboss.weld.injection.Exceptions.rethrowException(Exceptions.java:73) [weld-core-1.1.13.Final-redhat-1.jar:1.1.13.Final-redhat-1]
at org.jboss.weld.injection.MethodInjectionPoint.invokeOnInstanceWithSpecialValue(MethodInjectionPoint.java:162) [weld-core-1.1.13.Final-redhat-1.jar:1.1.13.Final-redhat-1]
at org.jboss.weld.event.ObserverMethodImpl.sendEvent(ObserverMethodImpl.java:245) [weld-core-1.1.13.Final-redhat-1.jar:1.1.13.Final-redhat-1]
at org.jboss.weld.event.ObserverMethodImpl.sendEvent(ObserverMethodImpl.java:233) [weld-core-1.1.13.Final-redhat-1.jar:1.1.13.Final-redhat-1]
at org.jboss.weld.event.ObserverMethodImpl.notify(ObserverMethodImpl.java:213) [weld-core-1.1.13.Final-redhat-1.jar:1.1.13.Final-redhat-1]
at org.jboss.weld.event.ObserverNotifier.notifyObserver(ObserverNotifier.java:117) [weld-core-1.1.13.Final-redhat-1.jar:1.1.13.Final-redhat-1]
at org.jboss.weld.event.TransactionalObserverNotifier.notifyObserver(TransactionalObserverNotifier.java:44) [weld-core-1.1.13.Final-redhat-1.jar:1.1.13.Final-redhat-1]
at org.jboss.weld.event.ObserverNotifier.notifyObservers(ObserverNotifier.java:85) [weld-core-1.1.13.Final-redhat-1.jar:1.1.13.Final-redhat-1]
at org.jboss.weld.event.ObserverNotifier.fireEvent(ObserverNotifier.java:75) [weld-core-1.1.13.Final-redhat-1.jar:1.1.13.Final-redhat-1]
at org.jboss.weld.event.ObserverNotifier.fireEvent(ObserverNotifier.java:70) [weld-core-1.1.13.Final-redhat-1.jar:1.1.13.Final-redhat-1]
at org.jboss.weld.manager.BeanManagerImpl.fireEvent(BeanManagerImpl.java:562) [weld-core-1.1.13.Final-redhat-1.jar:1.1.13.Final-redhat-1]
at org.jboss.solder.servlet.exception.CatchExceptionFilter.doFilter(CatchExceptionFilter.java:74) [solder-impl-3.2.1.Final.jar:3.2.1.Final]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:246) [jbossweb-7.2.0.Final-redhat-1.jar:7.2.0.Final-redhat-1]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:214) [jbossweb-7.2.0.Final-redhat-1.jar:7.2.0.Final-redhat-1]
at org.jboss.solder.servlet.event.ServletEventBridgeFilter.doFilter(ServletEventBridgeFilter.java:74) [solder-impl-3.2.1.Final.jar:3.2.1.Final]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:246) [jbossweb-7.2.0.Final-redhat-1.jar:7.2.0.Final-redhat-1]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:214) [jbossweb-7.2.0.Final-redhat-1.jar:7.2.0.Final-redhat-1]
at org.jbpm.designer.web.filter.impl.PluggableFilter.doFilter(PluggableFilter.java:70) [jbpm-designer-backend-6.0.0-redhat-5.jar:6.0.0-redhat-5]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:246) [jbossweb-7.2.0.Final-redhat-1.jar:7.2.0.Final-redhat-1]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:214) [jbossweb-7.2.0.Final-redhat-1.jar:7.2.0.Final-redhat-1]
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230) [jbossweb-7.2.0.Final-redhat-1.jar:7.2.0.Final-redhat-1]
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:149) [jbossweb-7.2.0.Final-redhat-1.jar:7.2.0.Final-redhat-1]
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:389) [jbossweb-7.2.0.Final-redhat-1.jar:7.2.0.Final-redhat-1]
at org.jboss.as.jpa.interceptor.WebNonTxEmCloserValve.invoke(WebNonTxEmCloserValve.java:50) [jboss-as-jpa-7.2.0.Final-redhat-8.jar:7.2.0.Final-redhat-8]
at org.jboss.as.jpa.interceptor.WebNonTxEmCloserValve.invoke(WebNonTxEmCloserValve.java:50) [jboss-as-jpa-7.2.0.Final-redhat-8.jar:7.2.0.Final-redhat-8]
at org.jboss.as.web.security.SecurityContextAssociationValve.invoke(SecurityContextAssociationValve.java:169) [jboss-as-web-7.2.0.Final-redhat-8.jar:7.2.0.Final-redhat-8]
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:145) [jbossweb-7.2.0.Final-redhat-1.jar:7.2.0.Final-redhat-1]
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:97) [jbossweb-7.2.0.Final-redhat-1.jar:7.2.0.Final-redhat-1]
at org.apache.catalina.authenticator.SingleSignOn.invoke(SingleSignOn.java:408) [jbossweb-7.2.0.Final-redhat-1.jar:7.2.0.Final-redhat-1]
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:102) [jbossweb-7.2.0.Final-redhat-1.jar:7.2.0.Final-redhat-1]
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:336) [jbossweb-7.2.0.Final-redhat-1.jar:7.2.0.Final-redhat-1]
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:856) [jbossweb-7.2.0.Final-redhat-1.jar:7.2.0.Final-redhat-1]
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:653) [jbossweb-7.2.0.Final-redhat-1.jar:7.2.0.Final-redhat-1]
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:920) [jbossweb-7.2.0.Final-redhat-1.jar:7.2.0.Final-redhat-1]
at java.lang.Thread.run(Thread.java:695) [classes.jar:1.6.0_65]
Caused by: javax.servlet.ServletException: Exception loading process: Repository with alias dummy not found
at org.jbpm.designer.web.server.UUIDBasedRepositoryServlet.doGet(UUIDBasedRepositoryServlet.java:128) [jbpm-designer-backend-6.0.0-redhat-5.jar:6.0.0-redhat-5]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:734) [jboss-servlet-api_3.0_spec-1.0.2.Final-redhat-1.jar:1.0.2.Final-redhat-1]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:847) [jboss-servlet-api_3.0_spec-1.0.2.Final-redhat-1.jar:1.0.2.Final-redhat-1]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:295) [jbossweb-7.2.0.Final-redhat-1.jar:7.2.0.Final-redhat-1]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:214) [jbossweb-7.2.0.Final-redhat-1.jar:7.2.0.Final-redhat-1]
at org.jboss.solder.servlet.exception.CatchExceptionFilter.doFilter(CatchExceptionFilter.java:65) [solder-impl-3.2.1.Final.jar:3.2.1.Final]
... 23 more
Caused by: java.lang.IllegalStateException: Repository with alias dummy not found
at org.jbpm.designer.repository.vfs.RepositoryDescriptorProvider.getRepositoryDescriptor(RepositoryDescriptorProvider.java:66) [jbpm-designer-backend-6.0.0-redhat-5.jar:6.0.0-redhat-5]
at org.jbpm.designer.repository.vfs.RepositoryDescriptorProvider$Proxy$$$_WeldClientProxy.getRepositoryDescriptor(RepositoryDescriptorProvider$Proxy$$$_WeldClientProxy.java) [jbpm-designer-backend-6.0.0-redhat-5.jar:6.0.0-redhat-5]
at org.jbpm.designer.repository.vfs.RepositoryDescriptor.configure(RepositoryDescriptor.java:112) [jbpm-designer-backend-6.0.0-redhat-5.jar:6.0.0-redhat-5]
at org.jbpm.designer.repository.vfs.RepositoryDescriptor.getFileSystem(RepositoryDescriptor.java:80) [jbpm-designer-backend-6.0.0-redhat-5.jar:6.0.0-redhat-5]
at org.jbpm.designer.repository.vfs.RepositoryDescriptor$Proxy$$$_WeldClientProxy.getFileSystem(RepositoryDescriptor$Proxy$$$_WeldClientProxy.java) [jbpm-designer-backend-6.0.0-redhat-5.jar:6.0.0-redhat-5]
at org.jbpm.designer.repository.vfs.VFSRepository.getFileSystem(VFSRepository.java:513) [jbpm-designer-backend-6.0.0-redhat-5.jar:6.0.0-redhat-5]
at org.jbpm.designer.repository.vfs.VFSRepository.loadAsset(VFSRepository.java:294) [jbpm-designer-backend-6.0.0-redhat-5.jar:6.0.0-redhat-5]
at org.jbpm.designer.repository.vfs.VFSRepository$Proxy$$$_WeldClientProxy.loadAsset(VFSRepository$Proxy$$$_WeldClientProxy.java) [jbpm-designer-backend-6.0.0-redhat-5.jar:6.0.0-redhat-5]
at org.jbpm.designer.web.repository.impl.UUIDBasedJbpmRepository.load(UUIDBasedJbpmRepository.java:32) [jbpm-designer-backend-6.0.0-redhat-5.jar:6.0.0-redhat-5]
at org.jbpm.designer.web.server.UUIDBasedRepositoryServlet.doGet(UUIDBasedRepositoryServlet.java:125) [jbpm-designer-backend-6.0.0-redhat-5.jar:6.0.0-redhat-5]
... 28 more

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:
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Actual results:

Expected results:

Additional info: