[Bug 214630] netstat displays spurious count for connections in LAST_ACK state inside jail with VIMAGE kernel

bugzilla-noreply at freebsd.org bugzilla-noreply at freebsd.org
Fri Nov 18 17:21:39 UTC 2016


https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=214630

            Bug ID: 214630
           Summary: netstat displays spurious count for connections in
                    LAST_ACK state inside jail with VIMAGE kernel
           Product: Base System
           Version: 11.0-RELEASE
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: freebsd-bugs at FreeBSD.org
          Reporter: tony181116 at outlook.com
                CC: freebsd-amd64 at FreeBSD.org
                CC: freebsd-amd64 at FreeBSD.org

When running 'netstat -sp tcp' inside of jail using VIMAGE kernel, when the
system is under load there appears to be a large number of connections in
LAST_ACK state.

TCP connection count by state:
        0 connections in CLOSED state
        1 connection  in LISTEN state
        6 connections in SYN_SENT state
        0 connections in SYN_RCVD state
        15 connections in ESTABLISHED state
        0 connections in CLOSE_WAIT state
        0 connections in FIN_WAIT_1 state
        0 connections in CLOSING state
        18446744073709551604 connections in LAST_ACK state
        0 connections in FIN_WAIT_2 state
        31 connections in TIME_WAIT state

The machine has not made this many connections since boot.

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