[MESOS-8163] Add an actor for handling HTTP requests for state (including streaming)

• Type: Improvement
• Status: Accepted
• Priority: Major
• Resolution: Unresolved
• Component/s: master
• Labels: foundations performance
• Epic Link: Operator API v1 Improvements
• Assignee: Unassigned
• Reporter: Benjamin Hindman
• Created: 02/Nov/17 17:03
• Updated: 21/Nov/19 21:58

Description

The master currently serves expensive state related requests on the master actor, which decreases responsiveness of the master significantly.

Now that parallel reads have been added, this tends not to backlog the master, but it still leads to requests sometimes taking multiple seconds to receive a response (when waiting for state requests in front of them).

One way to eliminate this issue is to use the state streaming api to stream state into a separate actor (or actors) that serve state information without blocking the master.

Issue Links

• relates to: MESOS-8345 Improve master responsiveness while serving state information.
• relates to: MESOS-10040 Keep an up-to-date v1 GetState object in the master's memory.