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Home > Success Center > Orion Platform > Orion Documentation > Additional Resources > Orion Platform 2018.4 Hotfix 2

Orion Platform 2018.4 Hotfix 2

Created by Magdalena.Markova, last modified by Reynaldo Larano on Feb 20, 2019

Views: 2,047 Votes: 0 Revisions: 19

Updated: January 30, 2019

Issues Addressed 

SolarWinds Orion Platform 2018.4 Hotfix 2 addresses the following issues:

  • When you open PerfStack for SCM nodes with baselines, you can see all metrics you added earlier, including Server Configuration Changes and Alerts.
  • When creating a file group for a memory-optimized table, the Configuration wizard completes successfully.
  • Service Directory / Cortex memory leaks when connecting to the agent messaging service have been resolved. 
  • Privilege escalation attack through RabbitMQ service was addressed.
  • JSON serialization helper security fix was enhanced.
  • Fixed issue when Summarizing statistics data prevent polling and lower performance.
  • BusinessLayerHost can recover when a plug-in process is killed.
  • Data Aggregation issue caused by missing database permissions is resolved.
  • Calculation of free memory for Linux and AIX was unified.
  • All agent deployments methods, except for manual installation, now work without issues when the Orion certificate serial number starts with FF.


SolarWinds Orion Platform 2018.4 Hotfix 2 is cumulative with Orion Platform 2018.4 Hotfix 1.



Apply this hotfix if you run any of the following SolarWinds products:

  • Orion Platform 2018.4 products


  • This hotfix requires SolarWinds Orion Platform 2018.4.
  • This hotfix must be installed on the main polling engine, on any additional polling engines or web servers, and High Availability servers.
  • This hotfix addresses the issue for SolarWinds Orion Platform. 


  1. Use an administrator account to log in to the server that hosts your SolarWinds Orion installation.
  2. Log in to the Customer Portal and download the installer:
    • To install the hotfix on an Orion server with Internet access, click Downloads > Download Product. Select your product and license tier, and download the Online Installation file. The Orion Installer downloads and installs the hotfix for you.
    • To install the hotfix on an offline environment, download the Hotfix Bundle for Products with Orion 2018.4.
  3. Run the installation file, and follow the instructions in the installation wizard.

After applying this fix, the issues outlined in the description should no longer occur.

Install the Hotfix with SolarWinds HA

Use these instructions to install the hotfix with SolarWinds HA.

The HA pool must be disabled to begin installation. If you install prior to disabling, the pool is automatically disabled.

  1. In the Orion Web Console, click Settings > All Settings > High Availability Deployment Summary.
  2. Select the pool you want to disable.
  3. Toggle High Availability to Off.
  4. Install the hotfix on the primary server in the pool.
  5. Install the hotfix on the secondary server in the pool.
  6. In the Orion Web Console, click Settings > All Settings > High Availability Deployment Summary.
  7. Select the pool you want to enable and toggle High Availability to On.

The Orion Web Console verifies all SolarWinds product versions match across the HA pair before enabling. If you receive errors, check your product versions.

You may need to recreate the HA pool. For details, see Set up an HA pool.

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