EM 12c : Agent Consumes High CPU due to Threads Stuck in "jdbc.driver.NTFConnection.run" "NTFConnection.readFromNetwork" (Doc ID 1474263.1)

Last updated on NOVEMBER 15, 2016

Applies to:

Enterprise Manager Base Platform - Version 12.1.0.1.0 to 12.1.0.5.0 [Release 12.1]
Information in this document applies to any platform.

Symptoms

The Enterprise Manager 12.1.0.1/2 Cloud Control Management Agent consumes high CPU.

Using the "$top" or  "$prstat"  utilities (Solaris  OS)  the high consuming processes can be identified:

 The agent uses port 47632 for NTFConnections.

When NTFConnection handles an nmap port scanning in the port used by the NTFConnection:

        $nmap -sV -p <port used> <host>

two threads are stuck using the port even when the port scanning has finished. 

Restarting the agent stops the cpu consumption,temporarily, but the symptom will reappear when port scanning is run again.

 

More about symptoms:

EM12c Agent java thread  consuming CPU.

 

Cause

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