Qlik Sense Repository service stops with "internal inconsistency Type CT” errors in Qlik Sense Engine log

Qlik Sense repository service stops and Qllik Sense Engine having "Internal inconsistency Type CT" errors.

2037 20171211T120427.406+0800 INFO QLIKSERVER01 System.Engine.Engine 10 0881add5-b989-4693-9d48-6dc05840b4bd .\QVadmin Engine: Server aborted. Reason for restart: Internal inconsistency, type CT, detected. 0 Internal Engine 20171211T120427.411+0800 3552 4784 20171204T142535.000+0800 0881add5-b989-4693-9d48-6dc05840b4bd

2038 20171211T120427.422+0800 ERROR QLIKSERVER01 System.Engine.Engine 26 334ee237-6c09-4ec1-b213-ec9394f84465 .\QVadmin Restart: Server aborted trying to recover by restart. Reason for restart: Internal inconsistency, type CT, detected. 0 Internal Engine 20171211T120427.413+0800 3552 4784 20171204T142535.000+0800 334ee237-6c09-4ec1-b213-ec9394f84465

2039 20171211T120428.406+0800 WARN QLIKSERVER01 System.Engine.Engine 26 16af8479-3919-4074-b55f-475ca5cea3b4 .\QVadmin Server: CPurger: Thread failure 0 Internal Engine 20171211T120428.412+0800 3500 4784 20171204T142535.000+0800 16af8479-3919-4074-b55f-475ca5cea3b4

Inconsistency Type "CT” indicates a  "Cache Trimmer" error, which means that the Qlik Engine is attempting to release memory by trimming the current cache size. 

This is an indication of limited or insufficient memory resources.
There can be different root causes or contributing factors for Qlik Sense or QlikView to end up with insufficient available memory.
See Troubleshooting Qlik Engine "Internal Inconsistency Type A" Error for more detail on how to optimize memory resources on the server.