InvalidUpdateError "Node __interrupt__ does not exist" when the graph object has been rebooted

[minki-j]

I use a checkpointer for a workflow that has interruptions for human-in-the-loop. When I get user's feedback, I use update_state() method to update the sate.

When the app object has been keep alive, everything works fine.

However, if the app object has been killed and restarted, I get this error:

InvalidUpdateError: Node __interrupt__ does not exist

[nfcampos]

Hi, can you share the full stack trace. And which version of langgraph you're using

[minki-j]

@nfcampos I'm using 0.2.16.

What do you exactly mean by full stack trace?

[nfcampos]

Which checkpointer are you using?

[minki-j]

@nfcampos I'm using SqliteSaver

with SqliteSaver.from_conn_string(db_path) as memory:
    main_graph = g.compile(
        checkpointer=memory, interrupt_before=["human_in_the_loop"]
    )

[minki-j]

main_graph.update_state(
    config,
    {"state_var": new_val},
    as_node="node",
)

@nfcampos I found a way to get around this error: after specifying as_node, the error doesn't happen.

[nfcampos]

Great. We've also released a new version that should fix the original issue, without requiring passing as_node.