When aggregating Path Analyzer data, the xDB Processing Pools database might suffer from having increased resource consumption and throwing the following error in the Sitecore logs:
Exception: System.ArgumentNullException Message: Value cannot be null. Parameter name: value0 Source: Sitecore.Kernel at Sitecore.Diagnostics.Assert.ArgumentNotNull(Object argument, String argumentName) at Sitecore.PathAnalyzer.Rules.MapConditions.InteractionSiteNameCondition.Compare(String value0, String value1) at Sitecore.Framework.Rules.BinaryCondition.Evaluate(IRuleExecutionContext context) at Sitecore.Framework.Rules.RuleEngine.Run(IRule rule, IFactProvider factProvider)
The issue occurs when interactions with no WebVisit facets are processed.
To resolve the issue, download and install the hotfix compatible with the affected product version:
Be aware that the hotfixes were built for specific Sitecore XP versions, and must not be installed on other Sitecore XP versions or in combination with other hotfixes. In case any other hotfixes have already been installed on a certain Sitecore XP instance, send a request for a compatibility check to Sitecore Support.
Note that the ZIP file contents must be extracted to locate installation instructions and related files inside. The hotfixes must be installed on a CM instance and then synced with other instances using standard development practices.