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Article ID: 132325, created on Mar 5, 2018, last review on Mar 5, 2018

  • Applies to:
  • Operations Automation 7.0
  • Operations Automation 7.1
  • Operations Automation 7.2
  • Operations Automation 7.3

Symptoms

Cannot navigate to OA > Service Nodes > Web Clusters. The below error is displayed:

    The operation you are trying to perform requires interaction with a component, which is presently unavailable. Please try again later. 

The service controller WebClustersc cannot start. The following error is registered in /var/log/messages:

Mar  1 11:19:43.348 SoLoader: ERR [0:41640:7fc056e05840 0:41640:7fc056e05840 soloader ]: [ ACEDLLFactoryManager::getFactory] Cannot dlopen /usr/local/pem/libexec/WebClustersc.so.7.0.0.28: libhiredis.so.0.10: cannot open shared object file: No such file or directory

Cause

The package hiredis was updated to version 0.12.1, while the WebClustersc service controller searches the version 0.10. The higher hiredis version was installed from the EPEL repo, which is not supported on the management node.

Resolution

  1. The EPEL repo must be disabled by default.
  2. Downgrade redis and hiredis packages to version which provided by OA.

    # yum downgrade redis hiredis
    

See also: KB132321: Supported version of RPM-package Redis

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