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How to Troubleshoot Oracle Fusion Middleware 11g OPMN Issues (Doc ID 1303000.1)

Last updated on JULY 03, 2023

Applies to:

Oracle Fusion Middleware - Version to [Release Oracle11g]
Information in this document applies to any platform.
Before troubleshooting OPMN on FMW or, popular known issues are covered by OPMN - Support Recommended Cumulative Merge Patch


This support document provides a general problem solving approach to resolving issues related to Oracle Fusion Middleware 11g OPMN (Oracle Process Management and Notification)

If this document does not enable you to resolve your problem directly, following the advice will help you to narrow down the issue and collect relevant information which can be uploaded to a Service Request if Oracle Customer Services are engaged.


1. While Fusion Middleware 11g OPMN is used to manage components like:
  • Web Tier (Oracle Web Cache and Oracle HTTP Server)
  • Portal / Forms / Reports / Discoverer
  • EM Agent
  • Oracle Internet Directory (OID) / Oracle Virtual Directory (OVD)
the document will NOT cover how to troubleshoot issues / errors that may occur with these OPMN managed components. Rather, it focuses on how to troubleshooting problems that you may encounter with the OPMN component itself.

2. If you are using Oracle Application Server 10g, review the advice given in

<Note 744433.1> How to Troubleshoot Problems with Starting Up OracleAS 10g OPMN Managed Components?

Troubleshooting Steps

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In this Document
Troubleshooting Steps
 Common / Known Issues
 OPMN in the Oracle Fusion Middleware 11g Stack
 Clear Down Logs
 Clear the OPMN "states" Directory
 Start OPMN Piece by Piece
 Validate the OPMN.xml File
 Does OPMN Process Manager and ONS Start Successfully?
 Checking for a Port Conflict
 Checking for a Network Misconfiguration
 Which OPMN Managed Processes Fail to Start?
 Review OPMN Logs (Optionally Enable Debug)
 Using Operating System Debug Utilities
 Core Dumps / Segmentation Faults and Abnormal Terminations
 Start Up Hangs or Spins or Timeouts
 OPMN Failures at FMW 11g Install/Configure Time

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