min 1 (#288)

truera · Jul 12, 2023 · d58c7d8 · d58c7d8
1 parent 694dfb0
commit d58c7d8
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/trulens_eval/trulens_eval/utils/langchain.py b/trulens_eval/trulens_eval/utils/langchain.py
@@ -170,7 +170,7 @@ def _get_relevant_documents(self, query: str, *,
         docs = super()._get_relevant_documents(query, run_manager=run_manager)
 
         # Evaluate the filter on each, in parallel.
-        ex = ThreadPoolExecutor(max_workers=len(docs))
+        ex = ThreadPoolExecutor(max_workers=max(1, len(docs)))
 
         futures = list(
             (