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背景介绍

我的场景是，C# DotNet5程序在Docker Net5镜像中，链接SqlServer服务器，直接Open显示超时，执行命令报错：Timeout expired. The timeout period elapsed prior to obtaining a connection from the pool. This may have occurred because all pooled connections were in use and max pool size was reached.
但事实上，最大池并没有超出。

解决方案

FROM mcr.microsoft.com/dotnet/aspnet:5.0-buster-slim AS base
WORKDIR /app# 配置 .NET 运行时强制使用旧版 TLS
ENV DOTNET_SYSTEM_NET_HTTP_USESOCKETSHTTPHANDLER=0
RUN sed -i 's/DEFAULT@SECLEVEL=2/DEFAULT@SECLEVEL=1/g' /etc/ssl/openssl.cnf# 安装根证书（可选，解决 SSL 证书信任问题）
RUN apt-get update && \apt-get install -y ca-certificates && \update-ca-certificates# 复制应用程序文件
COPY . .
ENTRYPOINT ["dotnet", "YourApp.dll"]