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Starting a BusinessProcess out of a PageFlow
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reply from <a href="http://community.jboss.org/people/hbender">Heri Bender</a> in <i>jBPM</i> - <a href="http://community.jboss.org/message/543810#543810">View the full discussion</a>
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<div class="jive-rendered-content"><p>Hi Alejandro</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Thanks that you want to have a closer look.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Attached an archive of a project which shows the problem (remark: it was a bit too big. I removed the lib jars from todoList/WebContent/WEB-INF/lib. I assume, you can add them manually again)</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>It is a seam generated ear project, in fact the todoList-Demo of seam 2.2. jBPM is version 3.2.5, the Project was maintained in JBossDevStudio 3.0.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p><br/>The problem arises when deploying:</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p><br/>12:24:05.223 (3853197) ERROR [HDScanner] org.jbpm.jpdl.xml.JpdlXmlReader - couldn't parse process definition<br/>java.lang.NullPointerException<br/>    at org.jbpm.graph.node.DbSubProcessResolver.findSubProcess(DbSubProcessResolver.java:43)<br/>    at org.jboss.seam.bpm.Jbpm$SeamSubProcessResolver.findSubProcess(Jbpm.java:374)<br/>    at org.jbpm.graph.node.ProcessState.read(ProcessState.java:90)<br/>    at org.jbpm.jpdl.xml.JpdlXmlReader.readNodes(JpdlXmlReader.java:261)<br/>    at org.jboss.seam.bpm.PageflowParser.readNodes(PageflowParser.java:41)<br/>    at org.jbpm.jpdl.xml.JpdlXmlReader.readProcessDefinition(JpdlXmlReader.java:157)<br/>    at org.jboss.seam.bpm.Jbpm.parseInputSource(Jbpm.java:359)<br/>    at org.jboss.seam.bpm.Jbpm.getPageflowDefinitionFromResource(Jbpm.java:165)<br/>    at org.jboss.seam.bpm.Jbpm.installPageflowDefinitions(Jbpm.java:278)</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>    at org.jboss.seam.bpm.Jbpm.startup(Jbpm.java:81)</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>...<br/>          <br/>When stepping through the code I can see that the DbSubProcessResolver.findSubProcess() method does not get a GraphSession (line 43), because I forgot to include the <br/>    <service name="persistence" factory="org.jbpm.persistence.db.DbPersistenceServiceFactory" /><br/>line in jbpm.cfg.xml. Astonishing, because before the ProcessDefinition was entered successfully into DB</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>After I have added this line, the error occurs already before above code is executed:</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>ERROR [main   ] org.jbpm.persistence.db.DbPersistenceService - hibernate commit failed<br/>org.hibernate.TransactionException: Transaction not successfully started                                    <br/>    at org.hibernate.transaction.JTATransaction.commit(JTATransaction.java:134)                         <br/>    at org.jbpm.persistence.db.DbPersistenceService.commit(DbPersistenceService.java:266)               <br/>    at org.jbpm.persistence.db.DbPersistenceService.close(DbPersistenceService.java:222)  <br/> ....                                                                                      </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p><br/>Analyzing the log shows that now different persistence handlers are involved:</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p><br/>Log-Output (without having declared persistence-service -> Error is no GraphSession): <br/>--------------------------------------------------------------------------------------</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>INFO  [HDScanner] org.jboss.logging.Logger.info(Logger.java:296) - JNDI InitialContext properties:{java.naming.factory.initial=org.jnp.interfaces.NamingContextFactory, java.naming.factory.url.pkgs=org.jboss.naming:org.jnp.interfaces}<br/>DEBUG [HDScanner] org.jbpm.persistence.jta.JtaDbPersistenceService.beginUserTransaction(JtaDbPersistenceService.java:74) - begin user transaction<br/>DEBUG [HDScanner] org.jbpm.persistence.db.DbPersistenceService.getSession(DbPersistenceService.java:104) - using current hibernate session<br/>INFO  [HDScanner] org.jboss.logging.util.LoggerStream.write(LoggerStream.java:156) - Hibernate: select processdef0_.ID_ as ID1_224_, processdef0_.NAME_ as NAME3_224_, processdef0_.DESCRIPTION_ as DESCRIPT4_224_, processdef0_.VERSION_ as VERSION5_224_, processdef0_.ISTERMINATIONIMPLICIT_ as ISTERMIN6_224_, processdef0_.STARTSTATE_ as STARTSTATE7_224_ from JBPM_PROCESSDEFINITION processdef0_ where processdef0_.NAME_=? order by processdef0_.VERSION_ desc limit ?<br/>INFO  [HDScanner] org.jboss.logging.util.LoggerStream.write(LoggerStream.java:156) - Hibernate: insert into JBPM_PROCESSDEFINITION (NAME_, DESCRIPTION_, VERSION_, ISTERMINATIONIMPLICIT_, STARTSTATE_, CLASS_) values (?, ?, ?, ?, ?, 'P')<br/>  ...<br/>INFO  [HDScanner] org.jboss.logging.util.LoggerStream.write(LoggerStream.java:156) - Hibernate: insert into JBPM_MODULEDEFINITION (NAME_, PROCESSDEFINITION_, STARTTASK_, CLASS_) values (?, ?, ?, 'T')<br/>DEBUG [HDScanner] org.jbpm.JbpmContext.close(JbpmContext.java:125) - closing jbpmContext org.jbpm.JbpmContext@5de3bd<br/>DEBUG [HDScanner] org.jbpm.persistence.jta.JtaDbPersistenceService.endUserTransaction(JtaDbPersistenceService.java:92) - committing user transaction<br/>INFO  [HDScanner] org.jboss.logging.util.LoggerStream.write(LoggerStream.java:156) - Hibernate: update JBPM_PROCESSDEFINITION set NAME_=?, DESCRIPTION_=?, VERSION_=?, ISTERMINATIONIMPLICIT_=?, STARTSTATE_=? where ID_=?<br/> ...<br/>INFO  [HDScanner] org.jboss.logging.util.LoggerStream.write(LoggerStream.java:156) - Hibernate: update JBPM_TRANSITION set TO_=? where ID_=?<br/>DEBUG [HDScanner] org.jbpm.configuration.JbpmContextInfo.createObject(JbpmContextInfo.java:145) - creating jbpm context with service factories '[]'<br/>DEBUG [HDScanner] org.jbpm.JbpmContext.<init>(JbpmContext.java:115) - creating org.jbpm.JbpmContext@1499884<br/>DEBUG [HDScanner] org.jbpm.configuration.JbpmContextInfo.createObject(JbpmContextInfo.java:145) - creating jbpm context with service factories '[]'<br/>DEBUG [HDScanner] org.jbpm.JbpmContext.<init>(JbpmContext.java:115) - creating org.jbpm.JbpmContext@9fa838<br/>ERROR [HDScanner] org.jbpm.jpdl.xml.JpdlXmlReader.readProcessDefinition(JpdlXmlReader.java:168) - couldn't parse process definition<br/>org.dom4j.DocumentException: Read error Nested exception: Read error<br/>    at org.dom4j.io.SAXReader.read(SAXReader.java:484)<br/>    at org.jbpm.jpdl.xml.JpdlParser.parse(JpdlParser.java:66)<br/>    at org.jbpm.jpdl.xml.JpdlXmlReader.readProcessDefinition(JpdlXmlReader.java:142)<br/>    at org.jboss.seam.bpm.Jbpm.parseInputSource(Jbpm.java:359)<br/>...</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p><br/>Log-Output (without having declared persistence-service -> error arise somewhere in the persistence handlers):<br/>-------------------------------------------------------------------------------------------------------------<br/>    <br/>DEBUG [main   ] org.jbpm.persistence.db.DbPersistenceService - creating hibernate session<br/>DEBUG [main   ] org.jbpm.persistence.db.DbPersistenceService - beginning hibernate transaction<br/>DEBUG [main   ] org.jbpm.persistence.db.DbPersistenceService - begun hibernate transaction org.hibernate.transaction.JTATransaction@8422f0<br/>INFO  [main   ] STDOUT - Hibernate: select processdef0_.ID_ as ID1_0_, processdef0_.NAME_ as NAME3_0_, processdef0_.DESCRIPTION_ as DESCRIPT4_0_, processdef0_.VERSION_ as VERSION5_0_, processdef0_.ISTERMINATIONIMPLICIT_ as ISTERMIN6_0_, processdef0_.STARTSTATE_ as STARTSTATE7_0_ from JBPM_PROCESSDEFINITION processdef0_ where processdef0_.NAME_=? order by processdef0_.VERSION_ desc limit ?<br/>...<br/>INFO  [main   ] STDOUT - Hibernate: insert into JBPM_MODULEDEFINITION (NAME_, PROCESSDEFINITION_, STARTTASK_, CLASS_) values (?, ?, ?, 'T')<br/>DEBUG [main   ] org.jbpm.JbpmContext - closing jbpmContext org.jbpm.JbpmContext@13f557<br/>DEBUG [main   ] org.jbpm.persistence.db.DbPersistenceService - committing org.hibernate.transaction.JTATransaction@8422f0<br/>INFO  [main   ] STDOUT - Hibernate: update JBPM_PROCESSDEFINITION set NAME_=?, DESCRIPTION_=?, VERSION_=?, ISTERMINATIONIMPLICIT_=?, STARTSTATE_=? where ID_=?<br/>...<br/>INFO  [main   ] STDOUT - Hibernate: update JBPM_TRANSITION set TO_=? where ID_=?<br/>DEBUG [main   ] org.jbpm.persistence.db.DbPersistenceService - closing hibernate session<br/>DEBUG [main   ] org.jbpm.persistence.db.DbPersistenceService - committing org.hibernate.transaction.JTATransaction@8422f0<br/>ERROR [main   ] org.jbpm.persistence.db.DbPersistenceService - hibernate commit failed<br/>org.hibernate.TransactionException: Transaction not successfully started<br/>    at org.hibernate.transaction.JTATransaction.commit(JTATransaction.java:134)<br/>    at org.jbpm.persistence.db.DbPersistenceService.commit(DbPersistenceService.java:266)<br/>    at org.jbpm.persistence.db.DbPersistenceService.close(DbPersistenceService.java:222)<br/>    at org.jbpm.svc.Services.close(Services.java:294)<br/>    at org.jbpm.JbpmContext.close(JbpmContext.java:136)<br/>    at org.jboss.seam.bpm.Jbpm.installProcessDefinitions(Jbpm.java:304)<br/>    at org.jboss.seam.bpm.Jbpm.startup(Jbpm.java:80)</p></div>
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