Problem

No Activity log found for few entities and profiles. 

Solution

Re-indexing enables you to reindex all activity log records in a tenant. By default, only the activity logs from the previous month are reindexed due to performance and storage size considerations. To reindex all activities in Elastic Search (ES), use the activityFullReindex parameter. However, this can cause a significant load on ES and performance degradation.

Prerequisites

This procedure requires the ADMIN_ROLE

Step1 

POST {ApplicationURL}/reindexActivities

POST {ApplicationURL}/api/{tenantId}/reindexActivities (ADMIN_ROLE or tenant admin roles are required) 

Step 2

If activity logs are still not displayed, then perform the reindex with 

activityFullReindex=true and 
enableV2Activities=true​ 

Note:  If activityFullReindex is true, the function reindexes all activities in ES. If activityFullReindex is false or not specified, only activities from the previous month are reindexed.

Documentation

https://docs.reltio.com/tasksapi/ReindexActivityTask.html?hl=reindex%2Cactivity%2Ctask

https://docs.reltio.com/tasksapi/reindexactivitylog.html?hl=reindex%2Cactivity%2Ctask

https://docs.reltio.com/activitylogapi/activitylog.html?hl=activity%2Ctask