Stack trace needs more details

[eyurtsev]

Privileged issue

• I am a LangChain maintainer, or was asked directly by a LangChain maintainer to create an issue here.

Issue Content

The RemotException that's surfaced does not have enough information to identify where the error is / which state update fails (InvalidUpdateError)

---------------------------------------------------------------------------
RemoteException                           Traceback (most recent call last)
Cell In[1], line 38
     13 remote_graph = RemoteGraph(graph_name, url=url)
     15 schema = {
     16     "title": "People Name Extractor",
     17     "description": "Extracts names of people from text.",
   (...)
     35     },
     36 }
---> 38 value = remote_graph.invoke(
     39     {
     40         "url": "https://www.apple.com/leadership/",
     41         "json_schema": schema,
     42         "examples": [],
     43     }
     44 )

File ~/.pyenv/versions/3.11.4/envs/graph_3_11_4/lib/python3.11/site-packages/langgraph/pregel/remote.py:772, in RemoteGraph.invoke(self, input, config, interrupt_before, interrupt_after)
    749 def invoke(
    750     self,
    751     input: Union[dict[str, Any], Any],
   (...)
    755     interrupt_after: Optional[Union[All, Sequence[str]]] = None,
    756 ) -> Union[dict[str, Any], Any]:
    757     """Create a run, wait until it finishes and return the final state.
    758 
    759     This method calls `POST [/threads/](http://localhost:8890/threads/){thread_id}[/runs/wait](http://localhost:8890/runs/wait)` if a `thread_id`
   (...)
    770         The output of the graph.
    771     """
--> 772     for chunk in self.stream(
    773         input,
    774         config=config,
    775         interrupt_before=interrupt_before,
    776         interrupt_after=interrupt_after,
    777         stream_mode="values",
    778     ):
    779         pass
    780     try:

File [~/.pyenv/versions/3.11.4/envs/graph_3_11_4/lib/python3.11/site-packages/langgraph/pregel/remote.py:630](http://localhost:8890/home/eugene/.pyenv/versions/3.11.4/envs/graph_3_11_4/lib/python3.11/site-packages/langgraph/pregel/remote.py#line=629), in RemoteGraph.stream(self, input, config, stream_mode, interrupt_before, interrupt_after, subgraphs)
    628         raise GraphInterrupt(chunk.data[INTERRUPT])
    629 elif chunk.event.startswith("error"):
--> 630     raise RemoteException(chunk.data)
    631 # filter for what was actually requested
    632 if mode not in requested:

RemoteException: {'error': 'InvalidUpdateError', 'message': "Expected node t

[anmol-aidora]

I agree. There should be an option to pass whole exception stacktrace in RemoteException