LOG: could not receive data from client: Connection reset by peer

• asyncpg version: 0.22.0
• PostgreSQL version: 12
• Do you use a PostgreSQL SaaS? If so, which? Can you reproduce
  the issue with a local PostgreSQL install?: AWS Aurora . Cannot reproduce with a local PostgreSQL.
• Python version: v3.7.6+
• Platform:
• Do you use pgbouncer?: No
• Did you install asyncpg with pip?: Yes
• If you built asyncpg locally, which version of Cython did you use?: N/A
• Can the issue be reproduced under both asyncio and
  uvloop?: just uvloop

It seems like asyncpg's connection pooler is not gracefully terminating connections. This seems to happen only with AWS Aurora version, but not the locally installed Postgres version.

Aurora Postgre has idle_in_transaction_session_timeout set to 86400000.

Here is the code to help reproduce this issue. .

from sanic import Sanic, Blueprint
from sanic.exceptions import NotFound
from sanic.response import json
from sanic.handlers import ErrorHandler
import asyncpg

app = Sanic(name="asyncpg-errors")
bp = Blueprint("info", url_prefix="/info")


DB_CONFIG = {
    'host':<url>,
    'user': <user>,
    'password': <password>,
    'port': 5432,
    'database': 'postgres'
}

def log_listener(connection, message):
    print(message)

@app.listener('before_server_start')
async def init(app, loop):
    app.pool = await asyncpg.create_pool(
        **DB_CONFIG, loop=loop,
        max_size=10, max_inactive_connection_lifetime=1
    )

@bp.route('/', methods=['GET'])
async def info(request):
    async with request.app.pool.acquire() as conn:
        conn.add_log_listener(log_listener)
        d = await conn.fetchrow('''SELECT * FROM mmrtest limit 1''')
        return json(dict(d))




group = Blueprint.group(bp)
app.blueprint(group)

app.run(port=9091, access_log=True, debug=True)

从提供的 Sanic 复现开始，重点关注 asyncpg.create_pool、max_inactive_connection_lifetime 以及连接获取/释放路径。在 AWS Aurora 上运行它，并将其行为与 uvloop 下的本地 PostgreSQL 进行比较。当连接重置行为得到解释，并且记录了经过验证的修复方案或范围明确的下一步时，即视为完成。