- Network: unavailable Note that the development build is not optimized. To create a production build, run npm run build.
时间: 2024-04-09 11:24:56 浏览: 90
"Network: unavailable"是一个提示,表示网络不可用。这通常出现在开发环境中,可能是由于网络连接问题或服务器故障导致的。需要检查网络连接是否正常,并确保服务器正常运行。
关于"Note that the development build is not optimized",这是一个提醒,意味着当前使用的是开发环境构建,而不是针对生产环境进行优化的版本。如果需要创建生产环境构建,可以运行命令"npm run build"。
相关问题
RuntimeError: Signalling support is unavailable because the blinker library is not installed.\
这个错误是因为你使用了 Flask-SocketIO 库,但是没有安装 blinker 库。blinker 库是 Flask-SocketIO 的依赖库之一,需要先安装它才能正常使用 Flask-SocketIO。
你可以通过以下命令安装 blinker 库:
```
pip install blinker
```
安装完成后,再次尝试运行代码,应该就可以解决这个问题了。
java.sql.SQLRecoverableException: IO 错误: The Network Adapter could not establish the connection
This exception is thrown when the Java program encounters an IO error while trying to establish a database connection. The error message specifically indicates that the network adapter (which is responsible for connecting to the database server) was unable to establish a connection.
Possible causes for this error include:
1. The database server is not running or is unavailable.
2. The network connection between the Java program and the database server is down or unstable.
3. The database server is configured to reject incoming connections from the Java program.
4. The database server is overloaded and unable to accept new connections.
To resolve this error, you should first verify that the database server is running and available. You can also try restarting the database server and/or the Java program to see if that resolves the issue. If the problem persists, you may need to check the network connection between the Java program and the database server, and ensure that the database server is properly configured to accept incoming connections from the Java program.