Timer Start Event - Unable to get it to work as described

ct1 — Wed, 14 Dec 2011 17:12:27 GMT

I am having difficulty using the timer start event. Could you please look at this documentation and tell me what I have missed?The User's Guide says:timeCycle. Specifies repeating interval, which can be useful for starting process periodically, or for sending multiple reminders for overdue user tas

Re: Timer Start Event - Unable to get it to work as described

ct1 — Thu, 15 Dec 2011 16:58:11 GMT

The original process has about thirty tasks in it, so I created a smaller process to test with.

The BPMN20.xml file:



<?xml version="1.0" encoding="UTF-8"?>
<definitions xmlns="http://www.omg.org/spec/BPMN/20100524/MODEL" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:activiti="http://activiti.org/bpmn" xmlns:bpmndi="http://www.omg.org/spec/BPMN/20100524/DI" xmlns:smileysurprised:mgdc="http://www.omg.org/spec/DD/20100524/DC" xmlns:smileysurprised:mgdi="http://www.omg.org/spec/DD/20100524/DI" typeLanguage="http://www.w3.org/2001/XMLSchema" expressionLanguage="http://www.w3.org/1999/XPath" targetNamespace="http://www.activiti.org/test">
  <process id="TestTimerStartEventProcess" name="TestTimerStartEventProcess">
    <documentation>Place documentation for the 'TestTimerStartEventProcess' process here.</documentation>
    <userTask id="userIsOutOfOffice" name="User Out of Office Today" activiti:candidateGroups="management">
      <documentation>User returns to office and approves something.</documentation>
      <extensionElements>
        <activiti:formProperty id="managerApproval" name="Do you approve this request?" type="boolean" required="true" readable="true" writable="true"></activiti:formProperty>
      </extensionElements>
    </userTask>
    <endEvent id="endevent1" name="End"></endEvent>
    <sequenceFlow id="flow1" name="" sourceRef="userIsOutOfOffice" targetRef="endevent1"></sequenceFlow>
    <startEvent id="timerstartevent1" name="Timer start">
      <timerEventDefinition>
        <timeCycle>R4/PT5M</timeCycle>
      </timerEventDefinition>
    </startEvent>
    <sequenceFlow id="flow3" name="" sourceRef="timerstartevent1" targetRef="logTheProcessStarted"></sequenceFlow>
    <scriptTask id="logTheProcessStarted" name="Log that Process Started" scriptFormat="groovy">
      <script><![CDATA[Date now = new Date();print "Timer start event started process at ${now} \n"]]></script>
    </scriptTask>
    <sequenceFlow id="flow5" name="" sourceRef="logTheProcessStarted" targetRef="servicetask1"></sequenceFlow>
    <serviceTask id="servicetask1" name="User Task" activiti:class="opt.argo.org.CheckForFile4"></serviceTask>
    <sequenceFlow id="flow6" name="" sourceRef="servicetask1" targetRef="userIsOutOfOffice"></sequenceFlow>
  </process>
  <bpmndi:BPMNDiagram id="BPMNDiagram_TestTimerStartEventProcess">
    <bpmndi:BPMNPlane bpmnElement="TestTimerStartEventProcess" id="BPMNPlane_TestTimerStartEventProcess">
      <bpmndi:BPMNShape bpmnElement="userIsOutOfOffice" id="BPMNShape_userIsOutOfOffice">
        <omgdc:Bounds height="55" width="105" x="450" y="120"></omgdc:Bounds>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="endevent1" id="BPMNShape_endevent1">
        <omgdc:Bounds height="35" width="35" x="610" y="130"></omgdc:Bounds>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="timerstartevent1" id="BPMNShape_timerstartevent1">
        <omgdc:Bounds height="35" width="35" x="160" y="130"></omgdc:Bounds>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="logTheProcessStarted" id="BPMNShape_logTheProcessStarted">
        <omgdc:Bounds height="55" width="105" x="270" y="120"></omgdc:Bounds>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="servicetask1" id="BPMNShape_servicetask1">
        <omgdc:Bounds height="55" width="105" x="450" y="260"></omgdc:Bounds>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNEdge bpmnElement="flow1" id="BPMNEdge_flow1">
        <omgdi:waypoint x="555" y="147"></omgdi:waypoint>
        <omgdi:waypoint x="610" y="147"></omgdi:waypoint>
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge bpmnElement="flow3" id="BPMNEdge_flow3">
        <omgdi:waypoint x="195" y="147"></omgdi:waypoint>
        <omgdi:waypoint x="270" y="147"></omgdi:waypoint>
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge bpmnElement="flow5" id="BPMNEdge_flow5">
        <omgdi:waypoint x="322" y="175"></omgdi:waypoint>
        <omgdi:waypoint x="322" y="287"></omgdi:waypoint>
        <omgdi:waypoint x="450" y="287"></omgdi:waypoint>
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge bpmnElement="flow6" id="BPMNEdge_flow6">
        <omgdi:waypoint x="502" y="260"></omgdi:waypoint>
        <omgdi:waypoint x="502" y="175"></omgdi:waypoint>
      </bpmndi:BPMNEdge>
    </bpmndi:BPMNPlane>
  </bpmndi:BPMNDiagram>
</definitions>

After deploying the process in Explorer and waiting five minutes, the log shows:



Dec 15, 2011 10:08:43 AM org.activiti.engine.impl.bpmn.deployer.BpmnDeployer deploy
INFO: Processing resource TestTimerStartEventProcess.bpmn20.xml
Dec 15, 2011 10:08:43 AM org.activiti.engine.impl.bpmn.parser.BpmnParse parseDefinitionsAttributes
INFO: XMLSchema currently not supported as typeLanguage
Dec 15, 2011 10:08:43 AM org.activiti.engine.impl.bpmn.parser.BpmnParse parseDefinitionsAttributes
INFO: XPath currently not supported as expressionLanguage
Dec 15, 2011 10:08:43 AM org.activiti.engine.impl.bpmn.deployer.BpmnDeployer deploy
INFO: Processing resource TestTimerStartEventProcess.png
Timer start event started process at Thu Dec 15 10:13:43 CST 2011
CheckForFile4.execute() was called at Thu Dec 15 10:13:43 CST 2011
CheckForFile$.lookForResumeFile() is running theCommand = "cmd /C dir C:\DataFiles\Incoming\*.Resume
.txt".
In CheckForFile4.lookForResumeFile() set theFileName = "ChrisChisolm.Resume.txt
In CheckForFile4.execute() set fileExists = true.

The first run of the process is okay.

Five minutes later, the log shows what looks like an OptimisticLockingException and then another deployment of the process I am testing (I did not request a deployment while in the middle of this test). This time the process is unable to find the Java class it executed five minutes ago.



Dec 15, 2011 10:18:43 AM org.activiti.engine.impl.interceptor.CommandContext close
SEVERE: Error while closing command context
org.activiti.engine.ActivitiOptimisticLockingException: TimerEntity[17000] was updated by another tr
ansaction concurrently
        at org.activiti.engine.impl.db.DbSqlSession.flushUpdates(DbSqlSession.java:435)
        at org.activiti.engine.impl.db.DbSqlSession.flush(DbSqlSession.java:348)
        at org.activiti.engine.impl.interceptor.CommandContext.flushSessions(CommandContext.java:147
)
        at org.activiti.engine.impl.interceptor.CommandContext.close(CommandContext.java:103)
        at org.activiti.engine.impl.interceptor.CommandContextInterceptor.execute(CommandContextInte
rceptor.java:49)
        at org.activiti.spring.SpringTransactionInterceptor$1.doInTransaction(SpringTransactionInter
ceptor.java:42)
        at org.springframework.transaction.support.TransactionTemplate.execute(TransactionTemplate.j
ava:130)
        at org.activiti.spring.SpringTransactionInterceptor.execute(SpringTransactionInterceptor.jav
a:40)
        at org.activiti.engine.impl.interceptor.LogInterceptor.execute(LogInterceptor.java:33)
        at org.activiti.engine.impl.jobexecutor.JobAcquisitionThread.run(JobAcquisitionThread.java:6
3)
Dec 15, 2011 10:18:43 AM org.activiti.engine.impl.jobexecutor.JobAcquisitionThread run
SEVERE: exception during job acquisition: TimerEntity[17000] was updated by another transaction conc
urrently
org.activiti.engine.ActivitiOptimisticLockingException: TimerEntity[17000] was updated by another tr
ansaction concurrently
        at org.activiti.engine.impl.db.DbSqlSession.flushUpdates(DbSqlSession.java:435)
        at org.activiti.engine.impl.db.DbSqlSession.flush(DbSqlSession.java:348)
        at org.activiti.engine.impl.interceptor.CommandContext.flushSessions(CommandContext.java:147
)
        at org.activiti.engine.impl.interceptor.CommandContext.close(CommandContext.java:103)
        at org.activiti.engine.impl.interceptor.CommandContextInterceptor.execute(CommandContextInte
rceptor.java:49)
        at org.activiti.spring.SpringTransactionInterceptor$1.doInTransaction(SpringTransactionInter
ceptor.java:42)
        at org.springframework.transaction.support.TransactionTemplate.execute(TransactionTemplate.j
ava:130)
        at org.activiti.spring.SpringTransactionInterceptor.execute(SpringTransactionInterceptor.jav
a:40)
        at org.activiti.engine.impl.interceptor.LogInterceptor.execute(LogInterceptor.java:33)
        at org.activiti.engine.impl.jobexecutor.JobAcquisitionThread.run(JobAcquisitionThread.java:6
3)
Dec 15, 2011 10:18:43 AM org.activiti.engine.impl.bpmn.deployer.BpmnDeployer deploy
INFO: Processing resource TestTimerStartEventProcess.bpmn20.xml
Dec 15, 2011 10:18:43 AM org.activiti.engine.impl.bpmn.parser.BpmnParse parseDefinitionsAttributes
INFO: XMLSchema currently not supported as typeLanguage
Dec 15, 2011 10:18:43 AM org.activiti.engine.impl.bpmn.parser.BpmnParse parseDefinitionsAttributes
INFO: XPath currently not supported as expressionLanguage
Dec 15, 2011 10:18:43 AM org.activiti.engine.impl.bpmn.deployer.BpmnDeployer deploy
INFO: Processing resource TestTimerStartEventProcess.png
Timer start event started process at Thu Dec 15 10:18:43 CST 2011
Dec 15, 2011 10:18:43 AM org.activiti.engine.impl.jobexecutor.TimerStartEventJobHandler execute
SEVERE: exception during timer execution
org.activiti.engine.ActivitiException: couldn't instantiate class opt.argo.org.CheckForFile4
        at org.activiti.engine.impl.util.ReflectUtil.instantiate(ReflectUtil.java:131)
        at org.activiti.engine.impl.bpmn.helper.ClassDelegate.instantiateDelegate(ClassDelegate.java
:156)
        at org.activiti.engine.impl.bpmn.helper.ClassDelegate.getActivityBehaviorInstance(ClassDeleg
ate.java:129)
        at org.activiti.engine.impl.bpmn.helper.ClassDelegate.execute(ClassDelegate.java:110)
        at org.activiti.engine.impl.pvm.runtime.AtomicOperationActivityExecute.execute(AtomicOperati
onActivityExecute.java:44)
        at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:
76)
        at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(Executio
nEntity.java:497)
        at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEnt
ity.java:492)
        at org.activiti.engine.impl.pvm.runtime.AtomicOperationTransitionNotifyListenerStart.eventNo
tificationsCompleted(AtomicOperationTransitionNotifyListenerStart.java:52)
        at org.activiti.engine.impl.pvm.runtime.AbstractEventAtomicOperation.execute(AbstractEventAt
omicOperation.java:56)
        at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:
76)
        at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(Executio
nEntity.java:497)
        at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEnt
ity.java:492)
        at org.activiti.engine.impl.pvm.runtime.AbstractEventAtomicOperation.execute(AbstractEventAt
omicOperation.java:49)
        at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:
76)
        at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(Executio
nEntity.java:497)
        at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEnt
ity.java:492)
        at org.activiti.engine.impl.pvm.runtime.AtomicOperationTransitionCreateScope.execute(AtomicO
perationTransitionCreateScope.java:49)
        at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:
76)
        at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(Executio
nEntity.java:497)
        at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEnt
ity.java:492)
        at org.activiti.engine.impl.pvm.runtime.AtomicOperationTransitionNotifyListenerTake.execute(
AtomicOperationTransitionNotifyListenerTake.java:65)
        at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:
76)
        at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(Executio
nEntity.java:497)
        at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEnt
ity.java:492)
        at org.activiti.engine.impl.pvm.runtime.AtomicOperationTransitionDestroyScope.execute(Atomic
OperationTransitionDestroyScope.java:115)
        at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:
76)
        at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(Executio
nEntity.java:497)
        at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEnt
ity.java:492)
        at org.activiti.engine.impl.pvm.runtime.AtomicOperationTransitionNotifyListenerEnd.eventNoti
ficationsCompleted(AtomicOperationTransitionNotifyListenerEnd.java:36)
        at org.activiti.engine.impl.pvm.runtime.AbstractEventAtomicOperation.execute(AbstractEventAt
omicOperation.java:56)
        at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:
76)
        at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(Executio
nEntity.java:497)
        at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEnt
ity.java:492)
        at org.activiti.engine.impl.pvm.runtime.AbstractEventAtomicOperation.execute(AbstractEventAt
omicOperation.java:49)
        at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:
76)
        at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(Executio
nEntity.java:497)
        at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEnt
ity.java:492)
        at org.activiti.engine.impl.persistence.entity.ExecutionEntity.take(ExecutionEntity.java:332
)
        at org.activiti.engine.impl.bpmn.behavior.BpmnActivityBehavior.performOutgoingBehavior(BpmnA
ctivityBehavior.java:102)
        at org.activiti.engine.impl.bpmn.behavior.BpmnActivityBehavior.performDefaultOutgoingBehavio
r(BpmnActivityBehavior.java:51)
        at org.activiti.engine.impl.bpmn.behavior.FlowNodeActivityBehavior.leave(FlowNodeActivityBeh
avior.java:44)
        at org.activiti.engine.impl.bpmn.behavior.AbstractBpmnActivityBehavior.leave(AbstractBpmnAct
ivityBehavior.java:37)
        at org.activiti.engine.impl.bpmn.behavior.ScriptTaskActivityBehavior.execute(ScriptTaskActiv
ityBehavior.java:49)
        at org.activiti.engine.impl.pvm.runtime.AtomicOperationActivityExecute.execute(AtomicOperati
onActivityExecute.java:44)
        at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:
76)
        at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(Executio
nEntity.java:497)
        at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEnt
ity.java:492)
        at org.activiti.engine.impl.pvm.runtime.AtomicOperationTransitionNotifyListenerStart.eventNo
tificationsCompleted(AtomicOperationTransitionNotifyListenerStart.java:52)
        at org.activiti.engine.impl.pvm.runtime.AbstractEventAtomicOperation.execute(AbstractEventAt
omicOperation.java:56)
        at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:
76)
        at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(Executio
nEntity.java:497)
        at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEnt
ity.java:492)
        at org.activiti.engine.impl.pvm.runtime.AbstractEventAtomicOperation.execute(AbstractEventAt
omicOperation.java:49)
        at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:
76)
        at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(Executio
nEntity.java:497)
        at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEnt
ity.java:492)
        at org.activiti.engine.impl.pvm.runtime.AtomicOperationTransitionCreateScope.execute(AtomicO
perationTransitionCreateScope.java:49)
        at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:
76)
        at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(Executio
nEntity.java:497)
        at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEnt
ity.java:492)
        at org.activiti.engine.impl.pvm.runtime.AtomicOperationTransitionNotifyListenerTake.execute(
AtomicOperationTransitionNotifyListenerTake.java:65)
        at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:
76)
        at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(Executio
nEntity.java:497)
        at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEnt
ity.java:492)
        at org.activiti.engine.impl.pvm.runtime.AtomicOperationTransitionDestroyScope.execute(Atomic
OperationTransitionDestroyScope.java:115)
        at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:
76)
        at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(Executio
nEntity.java:497)
        at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEnt
ity.java:492)
        at org.activiti.engine.impl.pvm.runtime.AtomicOperationTransitionNotifyListenerEnd.eventNoti
ficationsCompleted(AtomicOperationTransitionNotifyListenerEnd.java:36)
        at org.activiti.engine.impl.pvm.runtime.AbstractEventAtomicOperation.execute(AbstractEventAt
omicOperation.java:56)
        at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:
76)
        at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(Executio
nEntity.java:497)
        at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEnt
ity.java:492)
        at org.activiti.engine.impl.persistence.entity.ExecutionEntity.take(ExecutionEntity.java:332
)
        at org.activiti.engine.impl.bpmn.behavior.BpmnActivityBehavior.performOutgoingBehavior(BpmnA
ctivityBehavior.java:102)
        at org.activiti.engine.impl.bpmn.behavior.BpmnActivityBehavior.performDefaultOutgoingBehavio
r(BpmnActivityBehavior.java:51)
        at org.activiti.engine.impl.bpmn.behavior.FlowNodeActivityBehavior.leave(FlowNodeActivityBeh
avior.java:44)
        at org.activiti.engine.impl.bpmn.behavior.FlowNodeActivityBehavior.execute(FlowNodeActivityB
ehavior.java:36)
        at org.activiti.engine.impl.pvm.runtime.AtomicOperationActivityExecute.execute(AtomicOperati
onActivityExecute.java:44)
        at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:
76)
        at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(Executio
nEntity.java:497)
        at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEnt
ity.java:492)
        at org.activiti.engine.impl.pvm.runtime.AtomicOperationProcessStartInitial.eventNotification
sCompleted(AtomicOperationProcessStartInitial.java:44)
        at org.activiti.engine.impl.pvm.runtime.AbstractEventAtomicOperation.execute(AbstractEventAt
omicOperation.java:56)
        at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:
76)
        at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(Executio
nEntity.java:497)
        at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEnt
ity.java:492)
        at org.activiti.engine.impl.pvm.runtime.AtomicOperationProcessStart.eventNotificationsComple
ted(AtomicOperationProcessStart.java:44)
        at org.activiti.engine.impl.pvm.runtime.AbstractEventAtomicOperation.execute(AbstractEventAt
omicOperation.java:56)
        at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:
76)
        at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(Executio
nEntity.java:497)
        at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEnt
ity.java:492)
        at org.activiti.engine.impl.persistence.entity.ExecutionEntity.start(ExecutionEntity.java:28
6)
        at org.activiti.engine.impl.cmd.StartProcessInstanceCmd.execute(StartProcessInstanceCmd.java
:72)
        at org.activiti.engine.impl.jobexecutor.TimerStartEventJobHandler.execute(TimerStartEventJob
Handler.java:38)
        at org.activiti.engine.impl.persistence.entity.JobEntity.execute(JobEntity.java:78)
        at org.activiti.engine.impl.persistence.entity.TimerEntity.execute(TimerEntity.java:62)
        at org.activiti.engine.impl.cmd.ExecuteJobsCmd.execute(ExecuteJobsCmd.java:61)
        at org.activiti.engine.impl.interceptor.CommandExecutorImpl.execute(CommandExecutorImpl.java
:24)
        at org.activiti.engine.impl.interceptor.CommandContextInterceptor.execute(CommandContextInte
rceptor.java:42)
        at org.activiti.engine.impl.interceptor.LogInterceptor.execute(LogInterceptor.java:33)
        at org.activiti.engine.impl.jobexecutor.ExecuteJobsRunnable.run(ExecuteJobsRunnable.java:36)

        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: org.activiti.engine.ActivitiClassLoadingException: Class not found: opt.argo.org.CheckFor
File4
        at org.activiti.engine.impl.util.ReflectUtil.loadClass(ReflectUtil.java:81)
        at org.activiti.engine.impl.util.ReflectUtil.instantiate(ReflectUtil.java:128)
        … 105 more
Caused by: java.lang.ClassNotFoundException: opt.argo.org.CheckForFile4
        at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1680)
        at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1526)
        at java.lang.Class.forName0(Native Method)
        at java.lang.Class.forName(Class.java:247)
        at org.activiti.engine.impl.util.ReflectUtil.loadClass(ReflectUtil.java:62)
        … 106 more

Once this happens, the timer start event does not seem to attempt to start the process again.

If I need to provide more information to help get to the bottom of this, please let me know.

Thank you.

topic Timer Start Event - Unable to get it to work as described in Alfresco Archive

Timer Start Event - Unable to get it to work as described

Re: Timer Start Event - Unable to get it to work as described

Re: Timer Start Event - Unable to get it to work as described