Hey,
Im having the same error, it is caused by a automatic task that was executed before the first human task in process. I make a workaround solution for this and now it works fine.
When i get the taksInstanceId i try to claim and release the task, if the code thows any exeption I keep trying. When it execute ok I do the rest of code.
The WORKAROUND is this.
private URI getTriggerTaskInstanceId(URI processInstanceId) throws InterruptedException {
TaskInstanceManager taskInstanceManager = BPMFactory.getTaskInstanceManager();
HashSet<Status> statuses = new HashSet<Status>();
statuses.add(Status.READY);
Set<TaskAbstract> myTasks = taskInstanceManager.getMyTaskAbstractsByParent(processInstanceId, statuses);
if (myTasks.isEmpty()) {
return null;
} else {
TaskAbstract task = myTasks.iterator().next();
try{
taskInstanceManager.claim(task.getId());
taskInstanceManager.release(task.getId());
return task.getId();
}catch(Throwable t){
SimpleLogger.traceThrowable(Severity.ERROR, LOCATION, "getTriggerTaskInstanceId", t.getMessage(), t);
return null;
}
}
}
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