Where are the Incorta Logs and what can I find there?

First up, the Tomcat logs can be found in IncortaAnalytics/server/logs:

catalina.out - General all-purpose Tomcat logging.  Information related to exceptions thrown by the engine during dashboard or insight loading can be found here.  In addition, joins with zero matching rows, errors thrown from the SQL Interface and problems evaluating session variables can be found here.

localhost_access_log.* - This tracks all completed requests to Tomcat web services and front-end (pages, image loads, JS files, etc.), whether successful (200) or not (404, 500, etc.).  This does not include requests to the engine.

Can be safely ignored or are usually empty:

localhost.*.log

manager.*.log

host-manager.*.log

IncortaAnalytics/server/incorta/incorta.yyyy-MM-dd.log - Very granular logging mostly related to authentication and SQL interface requests.

IncortaAnalytics/server/incorta/<TENANT_NAME>/incorta.*.log - information and exceptions related to tenant startup, join creation data source creation, file upload and data loading.

IncortaAnalytics/tenants/company/data/audit.csv - Used to back the Incorta Audit dashboards, tracks every request made to Incorta server and measures response time and other metadata.