ToDo-List error when using advanced workflow

[unknown-user]

Hi folks.

My problem is as follows. When I use one of the default advanced workflow options, e.g. Review and Approve, the user who should do the review doesn't get a To-Do List on his "My Alfresco" site, but following error message.

To be honest with you, I'm not used to JavaScript and I don't see a solution to this error. What may be the reason for this failure?

An error occurred in one of the dashlets.
Failed to get to do tasks: java.lang.ClassCastException: java.lang.String cannot be cast to org.alfresco.repo.workflow.jbpm.JBPMNode
Failed to get to do tasks: java.lang.ClassCastException: java.lang.String cannot be cast to org.alfresco.repo.workflow.jbpm.JBPMNode
Failed to get to do tasks: java.lang.ClassCastException: java.lang.String cannot be cast to org.alfresco.repo.workflow.jbpm.JBPMNode
Failed to get to do tasks: java.lang.ClassCastException: java.lang.String cannot be cast to org.alfresco.repo.workflow.jbpm.JBPMNode
Failed to get to do tasks: java.lang.ClassCastException: java.lang.String cannot be cast to org.alfresco.repo.workflow.jbpm.JBPMNode
Failed to get to do tasks: java.lang.ClassCastException: java.lang.String cannot be cast to org.alfresco.repo.workflow.jbpm.JBPMNode

If you need more information, I'll give it to you.

Thanks in advance,
Chris.

[kevinr]

Yes please can you provide more info so we can try and reproduce this. I assume you are using 2.0 community?

Thanks,

Kevin

[unknown-user]

Yep, this is correct.

We are using the tomcat 2.0 community edition on a RedHat-Server in co-operation with an Oracle database (vers9.2).

The actual 'alfresco.log' also includes this error-message:

09:00:02,964 ERROR [org.alfresco.web.ui.common.Utils] Failed to get to do tasks: java.lang.ClassCastException: java.lang.String cannot be cast to org.alfresco.repo.workflow.jbpm.JBPMNode
java.lang.ClassCastException: java.lang.String cannot be cast to org.alfresco.repo.workflow.jbpm.JBPMNode
        at org.alfresco.repo.workflow.jbpm.JBPMEngine.createWorkflowInstance(JBPMEngine.java:2036)
        at org.alfresco.repo.workflow.jbpm.JBPMEngine.createWorkflowPath(JBPMEngine.java:1952)
        at org.alfresco.repo.workflow.jbpm.JBPMEngine.createWorkflowTask(JBPMEngine.java:2091)
        at org.alfresco.repo.workflow.jbpm.JBPMEngine$16.doInJbpm(JBPMEngine.java:804)
        at org.alfresco.repo.workflow.jbpm.JBPMEngine$16.doInJbpm(JBPMEngine.java:819)
        at org.springmodules.workflow.jbpm31.JbpmTemplate$1.doInHibernate(JbpmTemplate.java:87)
        at org.springframework.orm.hibernate3.HibernateTemplate.execute(HibernateTemplate.java:365)
        at org.springframework.orm.hibernate3.HibernateTemplate.execute(HibernateTemplate.java:333)
        at org.springmodules.workflow.jbpm31.JbpmTemplate.execute(JbpmTemplate.java:80)
        at org.alfresco.repo.workflow.jbpm.JBPMEngine.getAssignedTasks(JBPMEngine.java:783)
        at org.alfresco.repo.workflow.WorkflowServiceImpl.getAssignedTasks(WorkflowServiceImpl.java:303)
        at sun.reflect.GeneratedMethodAccessor824.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:335)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:181)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:148)
        at org.springframework.aop.support.DelegatingIntroductionInterceptor.invoke(DelegatingIntroductionInterceptor.java:116)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:170)
        at org.alfresco.repo.security.permissions.impl.AlwaysProceedMethodInterceptor.invoke(AlwaysProceedMethodInterceptor.java:40)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:170)
        at org.alfresco.repo.security.permissions.impl.ExceptionTranslatorMethodInterceptor.invoke(ExceptionTranslatorMethodInterceptor.java:49)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:170)
        at org.alfresco.repo.audit.AuditComponentImpl.auditImpl(AuditComponentImpl.java:219)
        at org.alfresco.repo.audit.AuditComponentImpl.audit(AuditComponentImpl.java:165)
        at org.alfresco.repo.audit.AuditMethodInterceptor.invoke(AuditMethodInterceptor.java:69)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:170)
        at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:96)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:170)
        at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:176)
        at $Proxy22.getAssignedTasks(Unknown Source)
        at org.alfresco.web.bean.workflow.WorkflowBean.getTasksToDo(WorkflowBean.java:146)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.apache.myfaces.el.PropertyResolverImpl.getProperty(PropertyResolverImpl.java:400)
        at org.apache.myfaces.el.PropertyResolverImpl.getValue(PropertyResolverImpl.java:71)
        at org.apache.myfaces.el.ELParserHelper$MyPropertySuffix.evaluate(ELParserHelper.java:532)
"alfresco.log" 3590L, 320320C

The "to-do" or task overview is the only thing which doesn't work properly. The rest works really fine. Actually, I can't even find / grep this code mentioned above.

Do you need other or more information?

Thanks,
Chris.

[unknown-user]

After restarting the server, i received the following messages in the alfresco.log.

09:05:11,478 ERROR [org.alfresco.repo.content.transform.magick.AbstractImageMagickContentTransformer] ImageMagickContentTransformer not available: Failed to execute command: convert /opt/alfresco/tomcat/temp/Alfresco/ImageMagickContentTransformer_init_source_48890.gif  /opt/alfresco/tomcat/temp/Alfresco/ImageMagickContentTransformer_init_target_48891.png
09:05:14,510 WARN  [org.springframework.remoting.rmi.RmiRegistryFactoryBean] Could not detect RMI registry - creating new one
09:05:18,765 WARN  [org.alfresco.util.OpenOfficeConnectionTester] A connection to OpenOffice could not be established.
09:05:37,667 INFO  [org.alfresco.repo.admin.ConfigurationChecker] The Alfresco root data directory ('dir.root') is: /opt/alfresco/alf_data
09:05:38,274 INFO  [org.alfresco.repo.admin.patch.PatchExecuter] Checking for patches to apply …
09:05:38,350 INFO  [org.alfresco.repo.admin.patch.PatchExecuter] No patches were required.
09:05:38,356 INFO  [org.alfresco.repo.module.ModuleServiceImpl] Found 0 module(s).
09:05:38,573 ERROR [org.alfresco.smb.protocol] Failed to get local domain/workgroup name, using default of WORKGROUP
09:05:38,573 ERROR [org.alfresco.smb.protocol] (This may be due to firewall settings or incorrect <broadcast> setting)
09:05:38,666 ERROR [org.alfresco.smb.protocol.netbios] NetBIOSNameServer setup error:
java.net.BindException: Permission denied
        at java.net.PlainDatagramSocketImpl.bind0(Native Method)
        at java.net.PlainDatagramSocketImpl.bind(PlainDatagramSocketImpl.java:82)
        at java.net.DatagramSocket.bind(DatagramSocket.java:368)
        at java.net.DatagramSocket.<init>(DatagramSocket.java:210)
        at java.net.DatagramSocket.<init>(DatagramSocket.java:261)
        at java.net.DatagramSocket.<init>(DatagramSocket.java:234)
        at org.alfresco.filesys.netbios.server.NetBIOSNameServer.openSocket(NetBIOSNameServer.java:1084)
        at org.alfresco.filesys.netbios.server.NetBIOSNameServer.run(NetBIOSNameServer.java:1556)
        at java.lang.Thread.run(Thread.java:619)
09:05:38,687 ERROR [org.alfresco.ftp.protocol] FTP Socket error
java.net.BindException: Permission denied
        at java.net.PlainSocketImpl.socketBind(Native Method)
        at java.net.PlainSocketImpl.bind(PlainSocketImpl.java:359)
        at java.net.ServerSocket.bind(ServerSocket.java:319)
        at java.net.ServerSocket.<init>(ServerSocket.java:185)
        at java.net.ServerSocket.<init>(ServerSocket.java:141)
        at org.alfresco.filesys.ftp.FTPNetworkServer.run(FTPNetworkServer.java:407)
        at java.lang.Thread.run(Thread.java:619)
09:05:38,687 ERROR [org.alfresco.smb.protocol] Server error :
java.net.BindException: Permission denied
        at java.net.PlainSocketImpl.socketBind(Native Method)
        at java.net.PlainSocketImpl.bind(PlainSocketImpl.java:359)
        at java.net.ServerSocket.bind(ServerSocket.java:319)
        at java.net.ServerSocket.<init>(ServerSocket.java:185)
        at java.net.ServerSocket.<init>(ServerSocket.java:141)
        at org.alfresco.filesys.smb.server.SessionSocketHandler.initialize(SessionSocketHandler.java:257)
        at org.alfresco.filesys.smb.server.NetBIOSSessionSocketHandler.createSessionHandlers(NetBIOSSessionSocketHandler.java:165)
        at org.alfresco.filesys.smb.server.SMBServer.run(SMBServer.java:495)
        at java.lang.Thread.run(Thread.java:619)
09:05:38,696 INFO  [org.alfresco.service.descriptor.DescriptorService] Alfresco JVM - v1.6.0_01-b06; maximum heap size 493.063MB
09:05:38,696 WARN  [org.alfresco.service.descriptor.DescriptorService] Alfresco JVM - WARNING - maximum heap size 493.063MB is less than recommended 512MB
09:05:38,697 INFO  [org.alfresco.service.descriptor.DescriptorService] Alfresco started (Community Network): Current version 2.0.0 (build-185) schema 38 - Installed version 2.0.0 (build-185) schema 38
‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

Does this make any sense to you, according to the problem mentioned in my first entry? Do the blocked ports affect the java application / adv. workflow function?

Regards,
Chris.

[unknown-user]

Is anybody able to provide me with information, on how to solve this problem? I still experience the same error, while using the advanced workflow function.

Can anybody help?

Chris

[kevinr]

The blocked ports make no difference to the workflow engine. I'll ask our JBPM expert if they've seen your original error.

Thanks,

Kevin

[unknown-user]

Hello kevinr,

thanks for your reply. Yesterday, in total desperation, I installed a newer version of Oracle DB on the server and from then on, the error is gone.

Now I use Oracle 10 XE, which seems to work fine. At least the workflow function doesn't produce anymore errors and the "to-do list" works properly.

Maybe this helps further users, too. Nevertheless, it would be interesting to hear the answer of your expert.

Regards,
Chris.

[medalhas]

Hi, any news from this topic?

I have the same problem, I am using Alfresco 2.0 Community with Informix IDS 9.40.
With PostgreSQL works fine but with Informix occurs this error it seems to be a problem related with the database, is there any workaround?

I already had some problems with the hibernate (creating schema) but i've solved, now i have the Alfresco working fine except the Advanced Workflow.

Regards
Luís Medalhas

[davidc]

This exception occurs on some databases, but not others.  We'll be investigating soon.

[ricvieira]

Did anyone found a solution for this?

I'm getting the exact same error,

 User:admin ERROR [ui.common.Utils] Failed to get to do tasks: java.lang.ClassCastException: java.lang.String cannot be cast to org.alfresco.repo.workflow.jbpm.JBPMNode
java.lang.ClassCastException: java.lang.String cannot be cast to org.alfresco.repo.workflow.jbpm.JBPMNode
        at org.alfresco.repo.workflow.jbpm.JBPMEngine.createWorkflowInstance(JBPMEngine.java:2881)
        at org.alfresco.repo.workflow.jbpm.JBPMEngine.createWorkflowPath(JBPMEngine.java:2789)
        at org.alfresco.repo.workflow.jbpm.JBPMEngine.createWorkflowTask(JBPMEngine.java:2946)
        at org.alfresco.repo.workflow.jbpm.JBPMEngine.getWorkflowTasks(JBPMEngine.java:1359)
        at org.alfresco.repo.workflow.jbpm.JBPMEngine$22.doInJbpm(JBPMEngine.java:1244)
        at org.alfresco.repo.workflow.jbpm.JBPMEngine$22.doInJbpm(JBPMEngine.java:1228)
        at org.springmodules.workflow.jbpm31.JbpmTemplate$1.doInHibernate(JbpmTemplate.java:87)
        at org.springframework.orm.hibernate3.HibernateTemplate.doExecute(HibernateTemplate.java:406)
        at org.springframework.orm.hibernate3.HibernateTemplate.execute(HibernateTemplate.java:339)
        at org.springmodules.workflow.jbpm31.JbpmTemplate.execute(JbpmTemplate.java:80)
        at org.alfresco.repo.workflow.jbpm.JBPMEngine.getAssignedTasks(JBPMEngine.java:1227)
        at org.alfresco.repo.workflow.WorkflowServiceImpl.getAssignedTasks(WorkflowServiceImpl.java:524)
        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)
…
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I'm using Alfresco 3.3.4 Enterprise, and Informix 11.7

Everything is working fine, i can create the workflow without any problem, but the To-Do List always give this error:

An error occurred in one of the dashlets.

    * Failed to get to do tasks: java.lang.ClassCastException: java.lang.String cannot be cast to org.alfresco.repo.workflow.jbpm.JBPMNode
    * Failed to get to do tasks: java.lang.ClassCastException: java.lang.String cannot be cast to org.alfresco.repo.workflow.jbpm.JBPMNode
    * Failed to get to do tasks: java.lang.ClassCastException: java.lang.String cannot be cast to org.alfresco.repo.workflow.jbpm.JBPMNode
    * Failed to get to do tasks: java.lang.ClassCastException: java.lang.String cannot be cast to org.alfresco.repo.workflow.jbpm.JBPMNode
‍‍‍‍‍‍‍

any help would be greatly appreciated

tnx in advance

Ricardo Vieira