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fix: prevent async generator cleanup errors in StreamableHTTP transport #1271

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Merged
dsp-ant merged 2 commits into from
Aug 14, 2025
Merged

fix: prevent async generator cleanup errors in StreamableHTTP transport #1271

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f0ec498
fix: explicit response cleanup in SSE handlers
mous222 Aug 13, 2025
47eda6d
Merge branch 'main' into fix/sse-response-cleanup
dsp-ant Aug 14, 2025
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2 changes: 2 additions & 0 deletions 2 src/mcp/client/streamable_http.py
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Original file line number Diff line number Diff line change
Expand Up @@ -248,6 +248,7 @@ async def _handle_resumption_request(self, ctx: RequestContext) -> None:
ctx.metadata.on_resumption_token_update if ctx.metadata else None,
)
if is_complete:
await event_source.response.aclose()
break

async def _handle_post_request(self, ctx: RequestContext) -> None:
Expand Down Expand Up @@ -330,6 +331,7 @@ async def _handle_sse_response(
# If the SSE event indicates completion, like returning respose/error
# break the loop
if is_complete:
await response.aclose()
break
except Exception as e:
logger.exception("Error reading SSE stream:")
Expand Down
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