Description

A JSS app might fail with a 500 error when HTML caching is enabled on components. This happens because caches are calculated with an increased nesting level. If this is the case, the application can experience one or more of the following symptoms:

• High memory, CPU usage arising from the cached object size growth.
• The following error in the logs:

  "Rendering data contained rendering reference ID {} but that rendering ID was not present in the rendered renderings context" 

This issue affects Sitecore JavaScript Services 12.0.0–14.0.0 versions.

Solution

To resolve the issue, download and install the hotfix compatible with the affected product version:

• For Sitecore XP 9.3 and JSS 13.0.0: SC Hotfix 439462-1 Layout Service 5.0.0.zip
• For Sitecore XP 9.2 and JSS 12.0.0: SC Hotfix 512632-1 Layout Service 5.0.0.zip
• For Sitecore XP 9.1.1 and JSS 11.1.0: SC Hotfix 528830-1 Layout Service 4.1.0_2.zip
• For Sitecore XP 9.1.0 and JSS 11.0.0: SC Hotfix 439140-1 Layout Service 4.0.2.zip

Be aware that the hotfixes were built for the specific Sitecore XP and JSS versions and must not be installed on other Sitecore XP and JSS 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 hotfix must be installed on a CM instance and then synced with other instances using standard development practices.