Scheduler and Vault Failed to record transaction - corda

Question

I'm quite new with Corda.
I want to do a Scheduler, is like a Todo List that check if the Task is assigned every 30 seconds.
I use the Java Template without any specific configuration, the database is H2 and the Corda version is 4.9
The State class extend ContractState, LinearState and SchedulableState
ToDoState
#BelongsToContract(ToDoContract.class)
public class TodoState implements ContractState, LinearState, SchedulableState {
private final Instant deadlineReminder;
public Party getAssignedBy() {
return assignedBy;
}
private final Party assignedBy;
public Party getAssignedTo() {
return assignedTo;
}
private final Party assignedTo;
public String getTaskDescription() {
return taskDescription;
}
private final String taskDescription;
private UniqueIdentifier linearId;
public TodoState(Party assignedBy, Party assignedTo, String taskDescription) {
this.assignedBy = assignedBy;
this.assignedTo = assignedTo;
this.taskDescription = taskDescription;
this.linearId = new UniqueIdentifier();
this.deadlineReminder = Instant.now().plusSeconds(30);
}
#ConstructorForDeserialization
public TodoState(Party assignedBy, Party assignedTo, String taskDescription, UniqueIdentifier linearId, Instant deadlineReminder) {
this.assignedBy = assignedBy;
this.assignedTo = assignedTo;
this.taskDescription = taskDescription;
this.linearId = linearId;
this.deadlineReminder = deadlineReminder;
}
public TodoState assign(Party assignedTo) {
return new TodoState(assignedBy, assignedTo, taskDescription, linearId, deadlineReminder);
}
#NotNull
#Override
public List<AbstractParty> getParticipants() {
return Arrays.asList(assignedBy, assignedTo);
}
#NotNull
#Override
public UniqueIdentifier getLinearId() {
return linearId;
}
#Nullable
#Override
public ScheduledActivity nextScheduledActivity(#NotNull StateRef thisStateRef, #NotNull FlowLogicRefFactory flowLogicRefFactory) {
System.out.println("nextScheduledActivity invoked");
System.out.println("StateRef TX is " + thisStateRef.getTxhash());
final ScheduledActivity scheduledActivity = new ScheduledActivity(flowLogicRefFactory.create(
"com.template.flows.AlarmFlow", thisStateRef
), deadlineReminder);
System.out.println("Passed");
return scheduledActivity;
}
}
The Flow
public class CreateToDoFlow {
#InitiatingFlow
#StartableByRPC
public static class CreateTodoFlowInitiator extends FlowLogic<Void> {
private final String taskDescription;
private Party me;
public CreateTodoFlowInitiator(String task) {
this.taskDescription = task;
}
#Override
#Suspendable
public Void call() throws FlowException {
this.me = getOurIdentity();
final Party notary = getServiceHub().getNetworkMapCache().getNotary(CordaX500Name.parse("O=Notary,L=London,C=GB"));
final TodoState output = new TodoState(this.me, this.me, this.taskDescription);
final TransactionBuilder builder = new TransactionBuilder(notary);
builder.addOutputState(output);
builder.addCommand(new Command.CreateToDoCommand(), me.getOwningKey());
builder.verify(getServiceHub());
final SignedTransaction ptx = getServiceHub().signInitialTransaction(builder);
subFlow(new FinalityFlow(ptx, Collections.<FlowSession>emptySet()));
System.out.println("1");
return null;
}
}
}
And the AlarmFlow called from the Scheduler, where, i guess the error come.
AlarmFlow
public class AlarmFlow {
#InitiatingFlow
#SchedulableFlow
public static class AlarmFlowInitiator extends FlowLogic<Void> {
private StateRef stateRef;
//public constructor
public AlarmFlowInitiator(StateRef stateRef) {
this.stateRef = stateRef;
}
#Override
#Suspendable
public Void call() throws FlowException {
ServiceHub sb = getServiceHub();
StateAndRef<TodoState> todoStateAndRef = sb.toStateAndRef(stateRef);
TodoState todo = todoStateAndRef.getState().getData();
sb.getVaultService().addNoteToTransaction(
stateRef.getTxhash(), "Reminder made: " + Instant.now()
);
System.out.println("DeadLine is coming up for task: " + todo.getTaskDescription());
return null;
}
}
}
when i execute the flow
flow start CreateTodoFlow task: "Pay bill"
i get the following error
[ERROR] 23:48:19+0200 [Node thread-1] vault.NodeVaultService. - Failed to record transaction states locally - the node could be now in an inconsistent state with other peers and/or the notary - hospitalising the flow {actor_id=internalShell, actor_owning_identity=O=PartyA, L=London, C=GB, actor_store_id=NODE_CONFIG, fiber-id=10000001, flow-id=5eb282b3-4b47-459d-917d-06ea0de16e6f, invocation_id=aadb5b6a-4716-4875-a18e-78a351592365, invocation_timestamp=2022-09-19T21:48:19.052Z, origin=internalShell, session_id=b78e7e1d-b91f-4c40-b42e-468e7b5f4fb0, session_timestamp=2022-09-19T21:48:18.782Z, thread-id=139, tx_id=1BBDFF4EC549457D1C8D60E30041AE97436D44778675BEB2C78E737DBFFFE124}
seems that the vault fail when is called in the Scheduled Activity method
Thanks in advance for your help

Answer 1

I have found the solution:
The scheduler call the AlarmFlow Class and the class is embebbed on the AlarmFlow class like that:
public class AlarmFlow {
#InitiatingFlow
#SchedulableFlow
public static class AlarmFlowInitiator extends FlowLogic<Void> {
private StateRef stateRef;
//public constructor
public AlarmFlowInitiator(StateRef stateRef) {
this.stateRef = stateRef;
}
#Override
#Suspendable
public Void call() throws FlowException {
ServiceHub sb = getServiceHub();
StateAndRef<TodoState> todoStateAndRef = sb.toStateAndRef(stateRef);
TodoState todo = todoStateAndRef.getState().getData();
sb.getVaultService().addNoteToTransaction(
stateRef.getTxhash(), "Reminder made: " + Instant.now()
);
System.out.println("DeadLine is coming up for task: " + todo.getTaskDescription());
return null;
}
}
}
If i extract the AlarmFlowInitiator class out side like that
#InitiatingFlow
#SchedulableFlow
public class AlarmFlow extends FlowLogic<Void>{
private StateRef stateRef;
//public constructor
public AlarmFlow(StateRef stateRef) {
this.stateRef = stateRef;
}
#Override
#Suspendable
public Void call() throws FlowException {
ServiceHub sb = getServiceHub();
StateAndRef<TodoState> todoStateAndRef = sb.toStateAndRef(stateRef);
TodoState todo = todoStateAndRef.getState().getData();
sb.getVaultService().addNoteToTransaction(
stateRef.getTxhash(), "Reminder made: " + Instant.now()
);
System.out.println("DeadLine is coming up for task: " + todo.getTaskDescription());
return null;
}
}
the Scheduler work properly