Cancelled Project Reload tasks are leading to inappropriate state of issue indexing

During async issue indexation if SonarQube instance has been stopped and it leads to marking Project Reload task as cancelled, web API "api/ce/indexation_status" returns inappropriate status, for example:

{
"isCompleted": true,
"percentCompleted": 94,
"hasFailures": false
}

This leads to problems in UI for failed/cancelled indexation for projects.

Solution:

Short term solution is to treat cancelled tasks as failed in indexation process, so that warning banner will appear and re-indexation will be required.

See: CeActivityMapper.xml # hasAnyFailedIssueSyncTaskSql