Uploaded image for project: 'Core Server'
  1. Core Server
  2. SERVER-17667

Slow performance against Secondary when Primary is down (with auth)

    • Type: Icon: Bug Bug
    • Resolution: Duplicate
    • Priority: Icon: Major - P3 Major - P3
    • None
    • Affects Version/s: 2.6.7
    • Component/s: Sharding
    • None
    • ALL

      • This was reported in Windows environment
      • auth is used
      • accessing data via MongoS.
      • readPreference is PrimaryPreferred
        When Primary goes down, queries are retrieved from the secondary, but with 1 second delay

      Developer Notes:
      1. App has persistent connection to mongos with auth so it is not creating fresh connections to mongos
      2. Topology
      App -> MongoS (on Computer A) -> Primary (on Computer B), and Secondary (on Computer A)
      3. MongoS tries to make a connection to Primary (which is down as part of test case), receives a ICMP Port Unreachable message, and then tries to connect to the Secondary. The 1 second delay is largely the ICMP port unreachable timeout.

            Assignee:
            randolph@mongodb.com Randolph Tan
            Reporter:
            alex.lerner Alex Lerner
            Votes:
            0 Vote for this issue
            Watchers:
            9 Start watching this issue

              Created:
              Updated:
              Resolved: