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Oracle Fusion Middleware 11g - Troubleshooting the Error "Failure of server APACHE bridge" (Doc ID 1304095.1)

Last updated on MAY 11, 2022

Applies to:

Oracle HTTP Server - Version and later
Oracle Reports Developer - Version and later
Oracle WebLogic Server - Version 10.3.1 and later
Oracle Fusion Middleware - Version and later
Oracle Discoverer - Version and later
Information in this document applies to any platform.
- This was written for FMW 11g for use with OHS 11g and WLS 10.3.6. The same concepts apply to newer versions. Refer to newer Oracle Documentation for tuning parameter advice.


This article provides a general problem solving approach to resolving the error:

Failure of server APACHE bridge

No backend server available for connection: timed out after 10 seconds or idempotent set to OFF.

Important to Note:

This troubleshooting support document features examples (including the images). These are "EXAMPLES ONLY". The fact, for example, that Oracle Forms is used as an example does not mean that processes and applications specific to the back end product (e.g. Oracle Forms) are responsible for the error. Troubleshooting efforts should focus on why there is a "disconnect" between the Oracle HTTP Server (OHS) mod_wl_ohs module and the given Oracle WebLogic Managed Server.
@Internal Only: If you resolve a Service Request or issue using a technique or problem solving path which is not described in this troubleshooting support document, please add a comment rather than create a new support document with a title containing the words 'Failure of server APACHE bridge'. 

Troubleshooting Steps

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In this Document
Troubleshooting Steps
 "Failure of server APACHE bridge" Explained
 Common Causes / Solutions
 Have the WebLogic Managed Server(s) or Cluster been started?
 Are the WebLogic Managed Servers Responsive?
 Is MOD_WL_OHS front ending a cluster?
 Has MOD_WL_OHS been correctly configured?
 Is the Network correctly configured?
 Are you configuring SSL?
 Review Logs
 Diagnostic Tips
 Viewing mod_wl_ohs Routing and Debug Info
 Network Diagnosis
 MoS Community Discussions

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