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[3.13] gh-136234: Fix SelectorSocketTransport.writelines to be robust to connection loss (GH-136743) (GH-138702) (#139710)

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[3.14] gh-136234: Fix `SelectorSocketTransport.writelines` to be robust to connection loss (GH-136743) (GH-138702)
(cherry picked from commit 5cd6cfe4cf)

Co-authored-by: Kumar Aditya <kumaraditya@python.org>
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Miss Islington (bot) 2025-10-07 19:57:57 +02:00 • committed by GitHub
parent 333d4a6f49
commit 060eef27c3
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7
Lib/asyncio/selector_events.py
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@ -1170,6 +1170,13 @@ def writelines(self, list_of_data):
raise RuntimeError('unable to writelines; sendfile is in progress')
if not list_of_data:
return
if self._conn_lost:
if self._conn_lost >= constants.LOG_THRESHOLD_FOR_CONNLOST_WRITES:
logger.warning('socket.send() raised exception.')
self._conn_lost += 1
return
self._buffer.extend([memoryview(data) for data in list_of_data])
self._write_ready()
# If the entire buffer couldn't be written, register a write handler