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The HTTP proxy server specified by http_proxy is not accessible
在执行sqlplus时可能遇到

HTTP proxy setting has incorrect value
SP2-1502: The HTTP proxy server specified by http_proxy is not accessible

Cause: The HTTP proxy server used by SQL*Plus cannot be accessed. SQL*Plus will be unable to run scripts located on a web server.
Action: Check that the proxy setting has the correct value, or unset it if no proxy is needed. SQL*Plus may get the proxy name from the environment variable http_proxy, or the value may be set in another way on your system. Check that the given proxy server is operational. Most web browsers can be configured to use a proxy. Configure a browser to use the desired proxy and verify that web pages can still be loaded.

我的解决办法是取消代理，或者

unset no_proxy