Uncaught exception when retrieving a BackgroundTask object with a taskContext field that cannot be deserialized

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: 7.0.X EE, Master
• Fix Version/s: 7.0.0 DXP FP23, 7.0.X EE, 7.0.4 CE GA5, 7.1.X, Master
• Component/s: Core Infrastructure > Service Builder, Portal Services > Background Tasks
• Labels:
  • liferay-digital-enterprise-70-sp5
  • liferay-fixpack-de-23-7010
• Branch Version/s:
  7.0.x
• Backported to Branch:
  Committed
• Fix Priority: 3
• Git Pull Request: https://github.com/brianchandotcom/liferay-portal/pull/50084

Description
When trying to fetch a BackgroundTask object using the BackgroundTaskPersistence, we will not catch the exception if JSONFactory.deserialize() throws an exception. This may not sound like an issue; however, the data inside the taskContext is guaranteed to be invalid during the upgrade, since UpgradeBackgroundTaskExecutorClassNames doesn't get run until the export-import-service module gets upgraded. So we should avoid having an uncaught exception in this circumstance.

This issue is not testable by QA.