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  1. Traffic Server
  2. TS-4879

NetVC leaks while hyper emergency occur on check_emergency_throttle()

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    Details

    • Type: Bug
    • Status: Closed
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 6.2.1, 7.0.0
    • Component/s: Core
    • Labels:
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      Description

      The con could be closed if hyper emergency occur on check_emergency_throttle().

      But we did not check the con.fd while we get return from check_emergency_throttle().

      For hyper emergency:

      • The socket fd is removed from epoll while it is closed.
      • A NetVC with a closed socket fd is created and callback NET_EVENT_OPEN to SM.

      Thus:

      • The NetVC will never triggered by NetHandler.
      • Only InactivityCop could handle the NetVC and the default timeout value is 86400 secs.

      For the counter: net_connections_currently_open_stat

      • It is increased in “connect_re_internal()”
      • It isn't decreased while the con.fd set to NO_FD due to hyper emergency
      • Because it is decreased in close_UnixNetVConnection() only con.fd != NO_FD. (TS-4178)

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            • Assignee:
              oknet Chao Xu
              Reporter:
              oknet Chao Xu
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              Dates

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                Updated:
                Resolved:

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