Submit a ticketCall us

WebinarWebinar: A checklist for planning your Network Performance Monitor (NPM) upgrade

Are you ready for your next upgrade? To help you plan smoothly, join this webcast to learn more about, SolarWinds® Orion® Installer, SolarWinds Upgrade Advisor, Upgrades Guides, Training Videos, and other resources available. We’ll share key upgrade planning considerations, lessons learned from customers with practical advice from SolarWinds Product Experts. We’ll also give practical tips to identify the estimated time needed and resources, how to prepare the business and IT staff for changes, ways to plan for required system changes, and more.

Register now.

Home > Success Center > Web Help Desk (WHD) > WHD - Knowledgebase Articles > Error: No Daemon Activity Detected

Error: No Daemon Activity Detected

Updated April 9, 2018



The following error displays in the Web Help Desk messages: 

No daemon activity detected. Check that at least one instance of the application 
has been configured as a dedicated or background daemon. 
For Tomcat deployments, this is done with the WHDDaemonMode environment entry in 
web.xml. For details, see the README.txt file in the Web Help Desk program folder, 
or FAQ 103 on the Web Help Desk Support site. 


  • All Web Help Desk versions
  • macOS®
  • Microsoft® Windows Server®
  • Linux


Insufficient memory allocated to the Java Virtual Machine (JVM)


  1. Calculate the JVM memory for your deployment.
  2. Increase the JVM Memory allocated to Web Help Desk.

Calculate the JVM memory for your deployment

Calculate the JVM memory using the following formula:

  • Assign 3 GB (for the first 10 technicians)
  • Add 1 GB for every 10 additional technicians

By default, Web Help Desk is allocated 512 MB of memory for the Java Virtual Machine Heap Space.

For example, if you have 20 concurrent techs, the MAXIMUM_MEMORY setting should be:

  • 3072 +1024 = 4096 or 4 GB

Due to the memory limitations of 32-bit Java (1500 MB maximum heap size), deployments that require more than 10 simultaneous users logged in must install the Web Help Desk 64-bit version.

Increase the JVM memory allocated to Web Help Desk

  1. Log in to the Web Help Desk server.
  2. Open the WHD installation directory.

    macOS:     Library\WebHelpDesk\conf

    Windows:   *:\Program Files\WebHelpDesk\conf

    Linux:          /usr/local/webhelpdesk/con

  3. Open the whd.conf file in a text-editing program (such as Notepad).
  4. Locate the MAXIMUM_MEMORY configuration setting.
  5. Enter the new value for the MAXIMUM_MEMORY setting.
  6. Save the file.
  7. Restart the Web Help Desk Service.



Last modified