Applications Systems

Linux Agent is Not Polling or Responding

Linux agent is unknown, agent is not responding, how to restart linux agent service. Applications are unknown on the Linux agent..

First published date

8/2/2019 2:37 PM

Last published date

9/22/2023 12:16 AM

Overview

Linux agent is not responding. Status in Manage agents is displaying unknown status. Agent is not polling any information. Assigned application monitors may show unknown. 

Product section

Server Application Monitor

Cause

  1. Network connection issue
  2. Firewall
  3. File / Folder permissions

Resolution

Restart the Agent Service
  1. SSH to the affected Linux machine.
  2. Restart the Linux machine:  
    service swiagentd restart

or 

systemctl restart swiagentd
  3. Check the status in Settings > All Settings > Manage Agents.

If the issue still persists, check the swiagent.log file (located under /opt/SolarWinds/Agent/bin/appdata/Logs) for messages like this:

22/01/26 09:45:41.723 PID: 25836 TID: 961804032 [WARN] void 
se_exception_initializer::Handle(std::exception&, const char*, int) - std::exception 
caught: Description: [Permission denied], File: /opt/buildagent/work/2013c8c4d182c8e2/Src/SolarWinds.Agent.Service.Lib/AgentRpcServiceBase.
cpp, Line: 120
Seeing such Messages may indicate permission is denied on /dev/shm for the swiagent user. To fix this, provide 1777 perm on /dev/shm and restart the agent service as per above steps.