Agent communication error: "Error sending message: NAK"

Products

• Workload Automation Agent
• CA Workload Automation AE - System Agent (AutoSys)
• CA Workload Automation DE - System Agent (dSeries)

Issue/Introduction

We have an agent that has been running, working and submitting jobs for quite some time.  All of a sudden the agent communication stopped working and all we can see is an error message in the transmitter log but not really sure what it means.

cybermation.library.communications.CybConversationException: Error sending message: NAK

 

 

Environment

Release : 11.x, 12.x

Component : CA Workload Automation System Agent

Cause

The error means agent is unable to send a 'NAK' to the scheduler to acknowledge that a message was received by the agent.

Possible causes are;

- network

- ports

- invalid manager / address.

Resolution

The scheduling manager address is invalid in agent's agentparm.txt file.

Update the address (communication.manageraddress_<n> parameter) in agentparm.txt file.

Restart the agent for the change to take effect.