Uploaded image for project: 'Traffic Server'
  1. Traffic Server
  2. TS-4902

Http2ConnectionState::stream_list gets in bad state

    XMLWordPrintableJSON

    Details

    • Type: Bug
    • Status: Closed
    • Priority: Blocker
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 7.1.0
    • Component/s: HTTP/2
    • Labels:
      None

      Description

      Saw this in one of my runs while debugging TS-4900 and TS-4813. It might have been due to my attempted fix, but I don't think so.

      I left current master running in production for an hour. When I returned, CPU utilization had jumped from 70% to 400%. perf top showed that the majority of time was being spent in Http2ConnectionState::restart_streams. Connected with debugger and two threads were spinning in that method. In each case this->stream_list.head->link.next == this->stream_list.head->link.prev and this->thread_list.head->link.next != NULL.

      I assume that was are missing some locking and the stream_list is being manipulated by two threads in parallel.

        Attachments

          Issue Links

            Activity

              People

              • Assignee:
                Unassigned
                Reporter:
                shinrich Susan Hinrichs
              • Votes:
                0 Vote for this issue
                Watchers:
                3 Start watching this issue

                Dates

                • Created:
                  Updated:
                  Resolved: