This is the central page that links to other LLAP debugging articles. You can find articles dealing with specific problems below; to provide some background and to help resolve other issues, there are also some helpful general-purpose articles:
A one-page overview of LLAP architecture: https://community.hortonworks.com/articles/149894/llap-a-one-page-architecture-overview.html
On the general debugging - where to find logs, UIs, metrics, etc.: https://community.hortonworks.com/articles/149896/llap-debugging-overview-logs-uis-etc.html
You might also find this non-debugging LLAP sizing and setup guide interesting:
Before getting to specific issues, there are some limitations with LLAP that you should be aware of; the following significant features are not supported:
Then, there are some articles about specific issues:
This list will be expanded in future with the issues that people are facing with LLAP.