Error type
History, memory and checkpoints
3 guides: 0 fixed, 0 workaround, 1 open.
- 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 → - LangGraphOpen
Cancelled async tool leaves history invalid even with handle_tool_errors=True
After a tool task is cancelled, the next model call fails with INVALID_CHAT_HISTORY.
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 →