`checkpoint_during=False` causes LangGraph Studio to crash

LangSmith Product Help Deployment
1

I have a graph, and in one of the nodes I’m invoking another graph.

I don’t need to have checkpoints for that other graph, so I added checkpoint_during=False when invoking it:

async def some_node(state, config):
    res = await subgraph.ainvoke(
        state, config, checkpoint_during=False
    )

    return {
        "a": res,
    }

The graph is executing correctly, I get the output I want. Do I actually need to specify False to prevent checkpointing of intermediate steps?

However, this is the error I get in the studio:

image
image594×466 21 KB

When I reload the page, I can see the graph again, and it works.

2

Thanks for flagging! Raised to the studio dev.

You can still set that when creating the parent run and it should propagate down, but this definitely looks like a UI bug.

3

Hi @lukanarrative, thanks for flagging this issue! Just wanted to raise that I’ve been able to reproduce and am working on a fix. Should have this resolved shortly.