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POJBPM 5.4 using custom class object as parameter in signal event
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copied!<p>I have set up jbpm 5.4 as a web application on tomcat using Bitronix as the transaction manager using Spring. When I try to signal event using a custom class object as the event parameter of <code>signalEvent</code></p> <pre><code>ErrorNode en = new ErrorNode(e.getMessage(), "abc", workItem.getId()); ksession.getProcessInstance(workItem.getProcessInstanceId()) .signalEvent("error", en); </code></pre> <p>I get the following exception. This error goes away if I substitute the <code>ErrorNode</code> object with a <code>String</code> or even a <code>HashMap</code> that contains only Strings or other primitive types. Any insight into why this is happening would be helpful. Is there a configuration that I am missing when using custom objects? I have declared the VariableName property of the signal event to contain this errorNode object which is declared as a process variable of the appropriate type. </p> <blockquote> <p><strong>EDIT:</strong> If you are a jbpm developer, you may want to look at this error that does not give an indication that it is in fact a serialization error on the programmers side that resulted in this error. The actual exception does not propagate to the output.</p> </blockquote> <pre><code>java.lang.RuntimeException: Could not commit session or rollback at org.drools.persistence.SingleSessionCommandService.rollbackTransaction(SingleSessionCommandService.java:406) at org.drools.persistence.SingleSessionCommandService.execute(SingleSessionCommandService.java:381) at org.drools.command.impl.CommandBasedStatefulKnowledgeSession.startProcess(CommandBasedStatefulKnowledgeSession.java:223) at services.StartProcess.h2startProcess(StartProcess.java:37) 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.springframework.web.method.support.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:219) at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:132) at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:104) at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:745) at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:686) at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:80) at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:925) at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:856) at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:920) at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:816) at javax.servlet.http.HttpServlet.service(HttpServlet.java:621) at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:801) 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.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99) at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:931) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407) at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1004) 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$Worker.runTask(ThreadPoolExecutor.java:886) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) at java.lang.Thread.run(Thread.java:662) Caused by: java.lang.RuntimeException: Unable to rollback transaction at org.drools.container.spring.beans.persistence.DroolsSpringTransactionManager.rollback(DroolsSpringTransactionManager.java:85) at org.drools.persistence.SingleSessionCommandService.rollbackTransaction(SingleSessionCommandService.java:402) ... 35 more Caused by: org.springframework.transaction.IllegalTransactionStateException: Transaction is already completed - do not call commit or rollback more than once per transaction at org.springframework.transaction.support.AbstractPlatformTransactionManager.rollback(AbstractPlatformTransactionManager.java:818) at org.drools.container.spring.beans.persistence.DroolsSpringTransactionManager.rollback(DroolsSpringTransactionManager.java:79) ... 36 more </code></pre>

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