Why System.CalloutException: Unable to tunnel through proxy. Proxy returns “HTTP/1.1 503 Service Unavailable” occur
ERROR] java.io.IOException: Unable to tunnel through proxy. Proxy returns "HTTP/1.1 503 Service Unavailable"Communication exception, Proxy settings might be incorrect" when using the API in the webservice transformation in IICS.
nginx-proxy returns 503 error over http and https · Issue #426 · nginx-proxy /nginx-proxy · GitHub
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System.CalloutException: Unable to tunnel through proxy. Proxy returns "HTTP/1.1 503 Service... - YouTube
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Why System.CalloutException: Unable to tunnel through proxy. Proxy returns “HTTP/1.1 503 Service Unavailable” occur
503 Service Unavailable from proxy with large number of connections · Issue #4316 · linkerd/linkerd2 · GitHub
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![Browsing the MOB on ESX 6 displays 503 Service Unavailable (Failed to connect to endpoint: [N7Vmacore4Http20NamedPipeServiceSpecE:0x4bf02038] _serverNamespace = /mob _isRedirect = false _pipeName =/var/run/vmware/proxy -mob)](https://2.bp.blogspot.com/-HJ8DX__4-7Q/VvVmD_L2nlI/AAAAAAAAA08/_aWltArssiEVKAbIqNJrgfrh0Shn9wlfQ/s1600/503%2BService%2BUnavailable.png "Browsing the MOB on ESX 6 displays 503 Service Unavailable (Failed to connect to endpoint: [N7Vmacore4Http20NamedPipeServiceSpecE:0x4bf02038] _serverNamespace = /mob _isRedirect = false _pipeName =/var/run/vmware/proxy -mob)")
Browsing the MOB on ESX 6 displays 503 Service Unavailable (Failed to connect to endpoint: [N7Vmacore4Http20NamedPipeServiceSpecE:0x4bf02038] _serverNamespace = /mob _isRedirect = false _pipeName =/var/run/vmware/proxy -mob)
