[YARN-10076] Add ability to provide required app information manually for log servlet

• Type: Sub-task
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Affects Version/s: 3.3.0
• Component/s: yarn
• Assignee: Adam Antal
• Reporter: Adam Antal
• Created: 08/Jan/20 09:27
• Updated: 08/Jan/20 09:27

Description

The Log servlet received its inputs from either the RM (in case of JHS) or the timeline (in case of AHS, ATS). If RM has fairly low max-app in state store config applied, then we are not going to get required information for the log servlet, though the aggregated logs are still available in the path. We should provide a "dummy" implementation of the AppInfoProvider.