Uploaded image for project: 'REEF'
  1. REEF
  2. REEF-2032

DriverStatusHTTPHandler causes timeout to Http Request if there is no Driver status change

    XMLWordPrintableJSON

    Details

    • Type: Bug
    • Status: Open
    • Priority: Major
    • Resolution: Unresolved
    • Affects Version/s: None
    • Fix Version/s: None
    • Component/s: REEF Bridge, REEF Driver
    • Labels:
      None

      Description

      As a HTTP Handler, it should response to every HTTP request to the endpoint "driverstatus/v1". 

       

      However, instead of recording the current Driver status, in DriverStatusHTTPHandler, it uses a queue to only save the change. If there is no change in Driver status, every HTTP requests will timeout. 

       

      The problem is in:

      https://github.com/apache/reef/blob/master/lang/java/reef-bridge-client/src/main/java/org/apache/reef/bridge/client/DriverStatusHTTPHandler.java#L154

       

       Reproduce:

      1. Modify HelloTask - add a while loop to print "Hello, REEF!" to prevent driver from exiting.
      2. Send HTTP request "http://IP:Port/driverstatus/v1" to query driver status multiple times.

       

      Observation:

      1. I am able to see Driver Status "INIT", "RUNNING"
      2. From this point on, all HTTP requests to this handler will timeout, unless Driver status changes again.

       

      Expectation:

      HTTP server should response with current Driver status at anytime.

       

       

       

        Attachments

          Activity

            People

            • Assignee:
              Unassigned
              Reporter:
              homezcx Chenxi Zhao
            • Votes:
              0 Vote for this issue
              Watchers:
              1 Start watching this issue

              Dates

              • Created:
                Updated: