Framework
LangGraph errors and fixes: 5 guides
Real LangGraph failures, each with the error you'll see, the cause and steps that worked. 0 of 5 fixed upstream. Search within LangGraph.
Workaround: 2
- LangGraphWorkaround
Agent repeats the same tool call until it hits the recursion limit
A prebuilt agent keeps calling tools step after step and only stops when GraphRecursionError is raised.
Last checked#loop#tool-calls5 steps → - LangGraphWorkaround
Setting recursion_limit to 10000 silently does nothing
with_config({"recursion_limit": 10000}) has no effect on a subgraph or agent.
Last checked#config3 steps →
Open: 1
Unverified: 2
- LangGraphUnverified
"tool_use ids were found without tool_result blocks" on a saved thread
An agent with a database checkpointer fails on every new message in one thread with a tool_use/tool_result mismatch error.
Last checked#state#tool-calls3 steps → - LangGraphUnverified
Token limit exceeded because retriever output piles up in chat history
A ReAct agent with a persistent checkpointer starts failing with token-limit errors after a few turns.
Last checked#state4 steps →