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EM 13c: WebLogic NodeManager Target Shows Incorrect Down Status (Doc ID 2332014.1)

Last updated on OCTOBER 02, 2019

Applies to:

Enterprise Manager for Fusion Middleware - Version and later
Linux x86-64


Using 13.x EM Cloud Control.

Weblogic Nodemanager target is showing down in EM Console.

Attempting an emctl getmetric test fails:

cd <agent_home>/bin

./emctl getmetric agent <TARGET NAME >,<TARGET TYPE>,Response

./emctl getmetric agent,weblogic_nodemanager,Response

/u01/app/oracle_oem_agent/agent_inst/bin/emctl getmetric agent,weblogic_nodemanager,Response
Oracle Enterprise Manager Cloud Control 13c Release 2
Copyright (c) 1996, 2016 Oracle Corporation. All rights reserved.
0,install_driver(Oracle) failed: Can't load '/u01/app/oracle_oem_agent/agent_13.' for module DBD::Oracle: cannot open shared object file: No such file or directory at /u01/app/oracle_oem_agent/agent_13. line 190.
at (eval 3) line 3
Compilation failed in require at (eval 3) line 3.
Perhaps a required shared library or dll isn't installed where expected

The key part of the error is " cannot open shared object file: No such file or directory" - EM is attempting to access the AIO library and cannot find it.


 The libaio RPM was removed from the server after installing the EM agent.

From a "good" host (NodeManager status is correct - no libaio error is returned from 'emctl getmetric' command):
/usr/bin/rpm -qa |grep libaio
libaio-0.3.109-13.el7.x86_64                      <<< Expected library is present.

From a "bad" host (host where the error appears):
/usr/bin/rpm -qa |grep libaio 

<nothing returned from RPM search>         <<< No library is returned - this means the required RPM is not installed on this server.


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