nav[aria-label="Primary Navigation"] { padding: 0; & ul { list-style: none; width: 100%; display: flex; flex-direction: row; justify-content: start; align-items: start; gap: 30px; padding: 0; & li { margin: 0; } & ul li { list-style: none; } } }

As we transition to the new Hyland Community, some post links may be temporarily disrupted as we finalize redirects. We apologize for the inconvenience and are working to resolve this as quickly as possible. Details.

Error at Web Service Invocation at Service Task Activity

rajendiran

Hi,

I built web service client in JAVA and trying to call this web service client java method from Service task. My java class implements "JavaDelegate" interface and implements "execute()" method. I copied web service client code below.

public class CheckLeaveWSClient implements JavaDelegate {
         public void execute(DelegateExecution execution) throws Exception {
      GetNoOfDaysProxy daysProcxy = new GetNoOfDaysProxy();
      StringHolder cname = new StringHolder("Ram");
      try{
         String result = daysProcxy.processLeave(cname);
         System.out.println(result);
      }
      catch(Exception e){
         e.printStackTrace();
   }
   }
}

I deployed the activiti process into activiti explorer. I am getting "couldn't instantiate class CheckLeaveWSClient" message in Activiti Explorer. This message is coming when Activiti engine tries to execute Service task. Please help me to fix this issue. Also I attched the bpmn file and log file (taken from tomcat) for your kind reference.

Thanks and Regards,
Rajendiran R

LeaveProcess.txt.zip

web Service Invocation Error.txt.zip

Find more posts tagged with

Comments

frederikherema1

Did you package the classes needed in a jar and added it to the tomcat class path? Including all dependencies the jar needs…

rajendiran

Dear Mr. Frederikheremans,

I packaged all dependency classes and executed. In Activiti Process Definition, I changed configuration from "Java Class" to "Expression" in Service Task. I created a bean at "activiti-context.xml" to invokde the method "activiti:expression="${callLeaveService.execute(execution)}". Now I am getting the below Exception.
"Caused by: java.lang.UnsupportedClassVersionError: com/nomura/activiti/service/CheckLeaveWSClient : Unsupported major.minor version 51.0 (unable to load class com.nomura.activiti.service.CheckLeaveWSClient)".

I am stuck in this from the past 3 days. Please help me to fix this issue.

I also attached activiti-context xml file, error log files from Tomcat and my bpmn file for your reference.

Thanks and Regards,
Rajendiran R

Activiti-Context-xml.txt.zip

LeaveWebServiceBPMNFile.txt.zip

catalina_1.txt.zip

stdout_20140730.txt.zip

frederikherema1

Caused by: java.lang.UnsupportedClassVersionError
With all due respect: Are you kidding me? You compiled the classes in a more recent Java version than the one you're running the engine on. Please use google/common sense before asking questions on activiti-forum…

rajendiran

Dear Mr. Frederikheremans,

I suspected the same. I changed the java version which is now common between the eclipse and Tomcat (where I have Activiti Engine). But this error still persists.

Moreover people will not shoot any questions with no common sense and I am not kidding also. My apologies if this question is irrelevant to what for Activiti Forum. I will double-check once again and will come back with update.

Thanks a lot for the support.

Regards,
Rajendiran R

frederikherema1

Rajendiran, I didn't mean to offend you but we try really hard to answer people's question about Activiti. We're not a java-forum - java.lang.UnsupportedClassVersionError's is a basic Java exception, totally unrelated to Activiti. So best to first check if the error is related specifically to activiti…