Hi
I am trying to deploy my code, but it fails with the error (from the log).
I have no idea what might be wrong with my code and what I need to fix.
Please, help.
8/24/2025, 12:00:38 AM
[INFO] Using auth of type=langsmith
8/24/2025, 12:00:38 AM
[INFO] Using langgraph_runtime_postgres
8/24/2025, 12:00:34 AM
[ERROR] Application startup failed. Exiting.
8/24/2025, 12:00:34 AM
[ERROR] Traceback (most recent call last):
File “/usr/local/lib/python3.11/site-packages/starlette/routing.py”, line 694, in lifespan
async with self.lifespan_context(app) as maybe_state:
File “/usr/local/lib/python3.11/contextlib.py”, line 210, in aenter
return await anext(self.gen)
^^^^^^^^^^^^^^^^^^^^^
File “/storage/langgraph_runtime_postgres/lifespan.py”, line 57, in lifespan
File “/storage/langgraph_runtime_postgres/database.py”, line 224, in start_pool
File “/storage/langgraph_runtime_postgres/database.py”, line 206, in migrate_vector_index
File “/storage/langgraph_runtime_postgres/store.py”, line 132, in set_store_config
File “/api/langgraph_api/graph.py”, line 662, in resolve_embeddings
ValueError: Could not load LangChain embeddings ‘openai:text-embedding-3-small’. Loading embeddings by provider:identifier requires the langchain package (>=0.3.9). Install it with: pip install ‘langchain>=0.3.9’ or specify ‘embed’ as a path to a variable in a Python file instead.
8/24/2025, 12:00:34 AM
[INFO] Applied database migration
Here is my langgraph.json file:
{ "python_version": "3.11", "dependencies": [ "./eaia" ], "graphs": { "main": "./eaia/main/graph.py:graph", "cron": "./eaia/cron_graph.py:graph", "general_reflection_graph": "./eaia/reflection_graphs.py:general_reflection_graph", "multi_reflection_graph": "./eaia/reflection_graphs.py:multi_reflection_graph" }, "env": "./.env", "store": { "index": { "embed": "openai:text-embedding-3-small", "dims": 1536 } } }