Fixed: Rebuild Reporting Database failed in Sitecore

We are using Sitecore 8.2 and our analytics data is stored in MongoDB database. Its size is around 50 GB.

From few days, we were not getting data in Sitecore analytics reports so we decided to rebuild reporting database.

We started rebuilding activity, but it fails on 8th days. We tried again, and same thing happen and failed on 8th days.

We started to investigate why its failing specially on 8th days?

Solution:

There is a config setting <TaskEntryAfterLife> in file "Sitecore.Analytics.Processing.config" which by default set for 8 days. 

<!-- TASK ENTRY AFTERLIFE

  Specifies the minimum time a task entry (and all associated data structures) is kept in the task queue after

  the task has executed.

 

  Default: 8.00:00:00

-->

<TaskEntryAfterLife>8.00:00:00</TaskEntryAfterLife>

We changed its entry for 15 days as

<!-- TASK ENTRY AFTERLIFE

  Specifies the minimum time a task entry (and all associated data structures) is kept in the task queue after

  the task has executed.

 

  Default: 8.00:00:00

-->

<TaskEntryAfterLife>15.00:00:00</TaskEntryAfterLife>

After this we again started rebuilding activity and this time it works fine and completed the task on 10th days.

Now we are getting missing data in Sitecore analytics reporting sections.

I hope it helps you to fix the similar issue.

Stay tuned for more such tips and tricks.