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"java.net.ProtocolException: Unrecognized response from SSL proxy: 'HTTP/1.0 503 Service Unavailable'" Error (Doc ID 2699978.1)

Last updated on AUGUST 16, 2023

Applies to:

Oracle WebLogic Server - Version 12.2.1.3.0 and later
Information in this document applies to any platform.

Symptoms

Oracle WebLogic Server 12.2.1.3.0 is installed on Linux x86-64 Red Hat Enterprise 7 and it fails to negotiate a proxy for the Identity Cloud Authentication connection.
It also fails to avoid the proxy for internal addresses, e.g. foreign server connections. Proxy appears to return 403 Forbidden for all connections.
This issue is in relation to WebLogic negotiating proxy for OUTBOUND connection to identity.oraclecloud.com - not inbound.

The WebLogic log file shows:

Changes

 

Cause

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In this Document
Symptoms
Changes
Cause
Solution
References


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