Synchronized reading the responses from a connection

CHANGES/1105.bugfix

@@ -0,0 +1 @@
+Synchronized reading the responses from a connection

CONTRIBUTORS.txt

@@ -25,6 +25,7 @@ Dima Kit
 Dima Kruk
 Dmitry Vasilishin <dmvass>
 Evgenii Morozov <emorozov>
+Federico Jaite <fedej>
 Hugo <hugovk>
 Ihor Gorobets
 Ihor Liubymov

aioredis/connection.py

@@ -559,6 +559,7 @@ class Connection:
         "_parser",
         "_connect_callbacks",
         "_buffer_cutoff",
+        "_lock",
         "__dict__",
     )
 
@@ -609,6 +610,7 @@ def __init__(
         )
         self._connect_callbacks: List[ConnectCallbackT] = []
         self._buffer_cutoff = 6000
+        self._lock = asyncio.Lock()
 
     def __repr__(self):
         repr_args = ",".join((f"{k}={v}" for k, v in self.repr_pieces()))
@@ -850,8 +852,9 @@ async def can_read(self, timeout: float = 0):
     async def read_response(self):
         """Read the response from a previously sent command"""
         try:
-            async with async_timeout.timeout(self.socket_timeout):
-                response = await self._parser.read_response()
+            async with self._lock:
+                async with async_timeout.timeout(self.socket_timeout):
+                    response = await self._parser.read_response()
         except asyncio.TimeoutError:
             await self.disconnect()
             raise TimeoutError(f"Timeout reading from {self.host}:{self.port}")

tests/test_connection.py

@@ -1,3 +1,4 @@
+import asyncio
 from typing import TYPE_CHECKING
 from unittest import mock
 
@@ -27,3 +28,9 @@ async def test_socket_param_regression(r):
     """A regression test for issue #1060"""
     conn = UnixDomainSocketConnection()
     await conn.disconnect() == True
+
+
+@pytest.mark.asyncio
+async def test_can_run_concurrent_commands(r):
+    assert await r.ping() is True
+    assert all(await asyncio.gather(*(r.ping() for _ in range(10))))