Java.Lang.OutOfMemoryError when running CSRQuery

When you run certain types of CSR queries over a large data set (for example Multi-group Summary Table queries) might generate the following error in ePO™ console.

An unexpected error occurred

The Orion.log file contains an error similar  to the following:

ERROR [http-8443-Processor23] [/analytics].[analytics] - Servlet.service() for servlet analytics threw exception
java.lang.ClassCastException: java.lang.OutOfMemoryError can’t be cast to java.lang.Exception

How to Fix

You must limit the data range of the query so that a smaller result set is returned.

If you continue to experience the issue after limiting the date range, see 

https://kbm.trellix.com/agent/index?page=content&id=KB71516

This reference provides information about increasing the maximum Java Memory Pool size available to ePO™.