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Client got network error after a while #598

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kitscribe opened this issue Aug 9, 2024 · 0 comments
Open

Client got network error after a while #598

kitscribe opened this issue Aug 9, 2024 · 0 comments
Labels
defect Suspected defect such as a bug or regression

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@kitscribe
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kitscribe commented Aug 9, 2024 •
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Observed behavior

Network errors occur after some time after the application starts

2024-08-09 13:23:45.032	TimeoutError
2024-08-09 13:23:45.032	    raise exceptions.TimeoutError() from exc
2024-08-09 13:23:45.032	  File "/usr/local/lib/python3.11/asyncio/tasks.py", line 502, in wait_for
2024-08-09 13:23:45.032	           ^^^^^^^^^^^^^^^^^^^^^^^
2024-08-09 13:23:45.032	    r, w = await asyncio.wait_for(
2024-08-09 13:23:45.032	  File "/usr/local/lib/python3.11/site-packages/nats/aio/transport.py", line 121, in connect
2024-08-09 13:23:45.032	    await self._transport.connect(
2024-08-09 13:23:45.032	  File "/usr/local/lib/python3.11/site-packages/nats/aio/client.py", line 1330, in _select_next_server
2024-08-09 13:23:45.032	Traceback (most recent call last):
2024-08-09 13:23:45.032	
2024-08-09 13:23:45.032	The above exception was the direct cause of the following exception:
2024-08-09 13:23:45.032	
2024-08-09 13:23:45.032	asyncio.exceptions.CancelledError
2024-08-09 13:23:45.032	           ^^^^^^^^^
2024-08-09 13:23:45.032	    return await fut
2024-08-09 13:23:45.032	  File "/usr/local/lib/python3.11/asyncio/selector_events.py", line 638, in sock_connect
2024-08-09 13:23:45.032	    await self.sock_connect(sock, address)
2024-08-09 13:23:45.032	  File "/usr/local/lib/python3.11/asyncio/base_events.py", line 974, in _connect_sock
2024-08-09 13:23:45.032	           ^^^^^^^^^^^^^^^^^^^^^^^^^
2024-08-09 13:23:45.032	    sock = await self._connect_sock(
2024-08-09 13:23:45.032	  File "/usr/local/lib/python3.11/asyncio/base_events.py", line 1070, in create_connection
2024-08-09 13:23:45.032	                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2024-08-09 13:23:45.032	    transport, _ = await loop.create_connection(
2024-08-09 13:23:45.032	  File "/usr/local/lib/python3.11/asyncio/streams.py", line 48, in open_connection
2024-08-09 13:23:45.032	           ^^^^^^^^^^^^
2024-08-09 13:23:45.032	    return fut.result()
2024-08-09 13:23:45.032	  File "/usr/local/lib/python3.11/asyncio/tasks.py", line 500, in wait_for
2024-08-09 13:23:45.032	Traceback (most recent call last):
2024-08-09 13:23:45.032	nats: encountered error
2024-08-09 13:23:41.027	TimeoutError
2024-08-09 13:23:41.027	    raise exceptions.TimeoutError() from exc
2024-08-09 13:23:41.027	  File "/usr/local/lib/python3.11/asyncio/tasks.py", line 502, in wait_for
2024-08-09 13:23:41.027	           ^^^^^^^^^^^^^^^^^^^^^^^
2024-08-09 13:23:41.027	    r, w = await asyncio.wait_for(
2024-08-09 13:23:41.027	  File "/usr/local/lib/python3.11/site-packages/nats/aio/transport.py", line 121, in connect
2024-08-09 13:23:41.027	    await self._transport.connect(
2024-08-09 13:23:41.027	  File "/usr/local/lib/python3.11/site-packages/nats/aio/client.py", line 1330, in _select_next_server
2024-08-09 13:23:41.027	Traceback (most recent call last):
2024-08-09 13:23:41.027	
2024-08-09 13:23:41.027	The above exception was the direct cause of the following exception:
2024-08-09 13:23:41.027	
2024-08-09 13:23:41.027	asyncio.exceptions.CancelledError
2024-08-09 13:23:41.027	           ^^^^^^^^^
2024-08-09 13:23:41.027	    return await fut
2024-08-09 13:23:41.027	  File "/usr/local/lib/python3.11/asyncio/selector_events.py", line 638, in sock_connect
2024-08-09 13:23:41.027	    await self.sock_connect(sock, address)
2024-08-09 13:23:41.027	  File "/usr/local/lib/python3.11/asyncio/base_events.py", line 974, in _connect_sock
2024-08-09 13:23:41.027	           ^^^^^^^^^^^^^^^^^^^^^^^^^
2024-08-09 13:23:41.027	    sock = await self._connect_sock(
2024-08-09 13:23:41.027	  File "/usr/local/lib/python3.11/asyncio/base_events.py", line 1070, in create_connection
2024-08-09 13:23:41.027	                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2024-08-09 13:23:41.027	    transport, _ = await loop.create_connection(
2024-08-09 13:23:41.027	  File "/usr/local/lib/python3.11/asyncio/streams.py", line 48, in open_connection
2024-08-09 13:23:41.027	           ^^^^^^^^^^^^
2024-08-09 13:23:41.027	    return fut.result()
2024-08-09 13:23:41.027	  File "/usr/local/lib/python3.11/asyncio/tasks.py", line 500, in wait_for
2024-08-09 13:23:41.027	Traceback (most recent call last):
2024-08-09 13:23:41.027	nats: encountered error
2024-08-09 13:23:37.019	TimeoutError
2024-08-09 13:23:37.019	    raise exceptions.TimeoutError() from exc
2024-08-09 13:23:37.019	  File "/usr/local/lib/python3.11/asyncio/tasks.py", line 502, in wait_for
2024-08-09 13:23:37.019	           ^^^^^^^^^^^^^^^^^^^^^^^
2024-08-09 13:23:37.019	    r, w = await asyncio.wait_for(
2024-08-09 13:23:37.019	  File "/usr/local/lib/python3.11/site-packages/nats/aio/transport.py", line 121, in connect
2024-08-09 13:23:37.019	    await self._transport.connect(
2024-08-09 13:23:37.019	  File "/usr/local/lib/python3.11/site-packages/nats/aio/client.py", line 1330, in _select_next_server
2024-08-09 13:23:37.019	Traceback (most recent call last):
2024-08-09 13:23:37.019	
2024-08-09 13:23:37.019	The above exception was the direct cause of the following exception:
2024-08-09 13:23:37.019	
2024-08-09 13:23:37.019	asyncio.exceptions.CancelledError
2024-08-09 13:23:37.019	           ^^^^^^^^^
2024-08-09 13:23:37.019	    return await fut
2024-08-09 13:23:37.019	  File "/usr/local/lib/python3.11/asyncio/selector_events.py", line 638, in sock_connect
2024-08-09 13:23:37.019	    await self.sock_connect(sock, address)
2024-08-09 13:23:37.019	  File "/usr/local/lib/python3.11/asyncio/base_events.py", line 974, in _connect_sock
2024-08-09 13:23:37.019	           ^^^^^^^^^^^^^^^^^^^^^^^^^
2024-08-09 13:23:37.019	    sock = await self._connect_sock(
2024-08-09 13:23:37.019	  File "/usr/local/lib/python3.11/asyncio/base_events.py", line 1070, in create_connection
2024-08-09 13:23:37.019	                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2024-08-09 13:23:37.019	    transport, _ = await loop.create_connection(
2024-08-09 13:23:37.019	  File "/usr/local/lib/python3.11/asyncio/streams.py", line 48, in open_connection
2024-08-09 13:23:37.019	           ^^^^^^^^^^^^
2024-08-09 13:23:37.019	    return fut.result()
2024-08-09 13:23:37.019	  File "/usr/local/lib/python3.11/asyncio/tasks.py", line 500, in wait_for
2024-08-09 13:23:37.019	Traceback (most recent call last):
2024-08-09 13:23:37.019	nats: encountered error
2024-08-09 13:23:33.013	TimeoutError
2024-08-09 13:23:33.013	    raise exceptions.TimeoutError() from exc
2024-08-09 13:23:33.013	  File "/usr/local/lib/python3.11/asyncio/tasks.py", line 502, in wait_for
2024-08-09 13:23:33.013	           ^^^^^^^^^^^^^^^^^^^^^^^
2024-08-09 13:23:33.013	    r, w = await asyncio.wait_for(
2024-08-09 13:23:33.013	  File "/usr/local/lib/python3.11/site-packages/nats/aio/transport.py", line 121, in connect
2024-08-09 13:23:33.013	    await self._transport.connect(
2024-08-09 13:23:33.013	  File "/usr/local/lib/python3.11/site-packages/nats/aio/client.py", line 1330, in _select_next_server
2024-08-09 13:23:33.013	Traceback (most recent call last):
2024-08-09 13:23:33.013	
2024-08-09 13:23:33.013	The above exception was the direct cause of the following exception:
2024-08-09 13:23:33.013	
2024-08-09 13:23:33.013	asyncio.exceptions.CancelledError
2024-08-09 13:23:33.013	           ^^^^^^^^^
2024-08-09 13:23:33.013	    return await fut
2024-08-09 13:23:33.013	  File "/usr/local/lib/python3.11/asyncio/selector_events.py", line 638, in sock_connect
2024-08-09 13:23:33.013	    await self.sock_connect(sock, address)
2024-08-09 13:23:33.013	  File "/usr/local/lib/python3.11/asyncio/base_events.py", line 974, in _connect_sock
2024-08-09 13:23:33.013	           ^^^^^^^^^^^^^^^^^^^^^^^^^
2024-08-09 13:23:33.013	    sock = await self._connect_sock(
2024-08-09 13:23:33.012	  File "/usr/local/lib/python3.11/asyncio/base_events.py", line 1070, in create_connection
2024-08-09 13:23:33.012	                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2024-08-09 13:23:33.012	    transport, _ = await loop.create_connection(
2024-08-09 13:23:33.012	  File "/usr/local/lib/python3.11/asyncio/streams.py", line 48, in open_connection
2024-08-09 13:23:33.012	           ^^^^^^^^^^^^
2024-08-09 13:23:33.012	    return fut.result()
2024-08-09 13:23:33.012	  File "/usr/local/lib/python3.11/asyncio/tasks.py", line 500, in wait_for
2024-08-09 13:23:33.012	Traceback (most recent call last):
2024-08-09 13:23:33.012	nats: encountered error
2024-08-09 13:23:29.006	TimeoutError
2024-08-09 13:23:29.006	    raise exceptions.TimeoutError() from exc
2024-08-09 13:23:29.006	  File "/usr/local/lib/python3.11/asyncio/tasks.py", line 502, in wait_for
2024-08-09 13:23:29.006	           ^^^^^^^^^^^^^^^^^^^^^^^
2024-08-09 13:23:29.006	    r, w = await asyncio.wait_for(
2024-08-09 13:23:29.006	  File "/usr/local/lib/python3.11/site-packages/nats/aio/transport.py", line 121, in connect
2024-08-09 13:23:29.006	    await self._transport.connect(
2024-08-09 13:23:29.006	  File "/usr/local/lib/python3.11/site-packages/nats/aio/client.py", line 1330, in _select_next_server
2024-08-09 13:23:29.006	Traceback (most recent call last):
2024-08-09 13:23:29.006	
2024-08-09 13:23:29.006	The above exception was the direct cause of the following exception:
2024-08-09 13:23:29.006	
2024-08-09 13:23:29.006	asyncio.exceptions.CancelledError
2024-08-09 13:23:29.006	           ^^^^^^^^^
2024-08-09 13:23:29.006	    return await fut
2024-08-09 13:23:29.006	  File "/usr/local/lib/python3.11/asyncio/selector_events.py", line 638, in sock_connect
2024-08-09 13:23:29.006	    await self.sock_connect(sock, address)
2024-08-09 13:23:29.006	  File "/usr/local/lib/python3.11/asyncio/base_events.py", line 974, in _connect_sock
2024-08-09 13:23:29.006	           ^^^^^^^^^^^^^^^^^^^^^^^^^
2024-08-09 13:23:29.006	    sock = await self._connect_sock(
2024-08-09 13:23:29.006	  File "/usr/local/lib/python3.11/asyncio/base_events.py", line 1070, in create_connection
2024-08-09 13:23:29.006	                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2024-08-09 13:23:29.006	    transport, _ = await loop.create_connection(
2024-08-09 13:23:29.006	  File "/usr/local/lib/python3.11/asyncio/streams.py", line 48, in open_connection
2024-08-09 13:23:29.006	           ^^^^^^^^^^^^
2024-08-09 13:23:29.006	    return fut.result()
2024-08-09 13:23:29.006	  File "/usr/local/lib/python3.11/asyncio/tasks.py", line 500, in wait_for
2024-08-09 13:23:29.006	Traceback (most recent call last):
2024-08-09 13:23:29.006	nats: encountered error
2024-08-09 13:23:27.004	TimeoutError: SSL shutdown timed out
2024-08-09 13:23:27.004	    await self._protocol._get_close_waiter(self)
2024-08-09 13:23:27.004	  File "/usr/local/lib/python3.11/asyncio/streams.py", line 364, in wait_closed
2024-08-09 13:23:27.004	           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2024-08-09 13:23:27.004	    return await self._io_writer.wait_closed()
2024-08-09 13:23:27.004	  File "/usr/local/lib/python3.11/site-packages/nats/aio/transport.py", line 180, in wait_closed
2024-08-09 13:23:27.004	    await self._transport.wait_closed()
2024-08-09 13:23:27.004	  File "/usr/local/lib/python3.11/site-packages/nats/aio/client.py", line 1419, in _attempt_reconnect
2024-08-09 13:23:27.004	Traceback (most recent call last):
2024-08-09 13:23:27.004	nats: encountered error
2024-08-09 13:21:36.802	ssl.SSLError: [SSL: APPLICATION_DATA_AFTER_CLOSE_NOTIFY] application data after close notify (_ssl.c:2706)
2024-08-09 13:21:36.802	           ^^^^^^^^^^^^^^^^^^^^^^^
2024-08-09 13:21:36.802	    return self._sslobj.shutdown()
2024-08-09 13:21:36.802	  File "/usr/local/lib/python3.11/ssl.py", line 983, in unwrap
2024-08-09 13:21:36.802	    self._sslobj.unwrap()
2024-08-09 13:21:36.802	  File "/usr/local/lib/python3.11/asyncio/sslproto.py", line 648, in _do_shutdown
2024-08-09 13:21:36.802	    await self._protocol._get_close_waiter(self)
2024-08-09 13:21:36.802	  File "/usr/local/lib/python3.11/asyncio/streams.py", line 364, in wait_closed
2024-08-09 13:21:36.802	           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2024-08-09 13:21:36.802	    return await self._io_writer.wait_closed()
2024-08-09 13:21:36.802	  File "/usr/local/lib/python3.11/site-packages/nats/aio/transport.py", line 180, in wait_closed
2024-08-09 13:21:36.802	    await self._transport.wait_closed()
2024-08-09 13:21:36.802	  File "/usr/local/lib/python3.11/site-packages/nats/aio/client.py", line 1419, in _attempt_reconnect
2024-08-09 13:21:36.802	Traceback (most recent call last):
2024-08-09 13:21:36.802	nats: encountered error
2024-08-09 13:20:25.633	ssl.SSLError: [SSL: APPLICATION_DATA_AFTER_CLOSE_NOTIFY] application data after close notify (_ssl.c:2706)
2024-08-09 13:20:25.633	           ^^^^^^^^^^^^^^^^^^^^^^^
2024-08-09 13:20:25.633	    return self._sslobj.shutdown()
2024-08-09 13:20:25.633	  File "/usr/local/lib/python3.11/ssl.py", line 983, in unwrap
2024-08-09 13:20:25.633	    self._sslobj.unwrap()
2024-08-09 13:20:25.633	  File "/usr/local/lib/python3.11/asyncio/sslproto.py", line 648, in _do_shutdown
2024-08-09 13:20:25.633	    await self._protocol._get_close_waiter(self)
2024-08-09 13:20:25.633	  File "/usr/local/lib/python3.11/asyncio/streams.py", line 364, in wait_closed
2024-08-09 13:20:25.633	           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2024-08-09 13:20:25.633	    return await self._io_writer.wait_closed()
2024-08-09 13:20:25.633	  File "/usr/local/lib/python3.11/site-packages/nats/aio/transport.py", line 180, in wait_closed
2024-08-09 13:20:25.633	    await self._transport.wait_closed()
2024-08-09 13:20:25.633	  File "/usr/local/lib/python3.11/site-packages/nats/aio/client.py", line 1419, in _attempt_reconnect
2024-08-09 13:20:25.633	Traceback (most recent call last):
2024-08-09 13:20:25.633	nats: encountered error

Expected behavior

No errors or crashes

Server and client version

client: ^= 2.7.2 (2.7.2 or higher)
server: == 2.6.1

Host environment

There are a consumer on the partner side I am connected to. After a while the connection is broken and it is not possible to reconnect. But if I restart the container with the application, it became all good for some time before the connection is broken again

Steps to reproduce

Here is how the connection is configured and used. The connection goes over TLS

    @staticmethod
    def _is_secured() -> bool:
        if environment.NATS_CONNECTION_STRING.startswith('tls://'):
            return True
        return False

    @staticmethod
    def _generate_ssl_context():
        ssl_ctx = ssl.create_default_context(purpose=ssl.Purpose.SERVER_AUTH)
        ssl_ctx.load_cert_chain(
            certfile=environment.NATS_TLS_CERTIFICATE_PATH,
            keyfile=environment.NATS_TLS_KEYFILE_PATH
        )
        return ssl_ctx

    async def connect(self) -> None:
        try:
            self.logger.info("Trying to connect to the NATS...")
            if self._secured:
                await self._nc.connect(
                    servers=environment.NATS_CONNECTION_STRING,
                    tls=self._generate_ssl_context(),
                    allow_reconnect=True,
                    max_reconnect_attempts=60,
                    ping_interval=20
                )
            else:
                await self._nc.connect(servers=settings.NATS_CONNECTION_STRING)
            self.logger.info("Connecting to the NATS succeed")

        except Error as e:
            self.logger.error(f"An error occurred while connecting to the NATS: {e}")

What could be the cause of this problem?

Thank you
@kitscribe kitscribe added the defect Suspected defect such as a bug or regression label Aug 9, 2024
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