[Bug 209471] Listen queue overflow due to too many sockets stuck in CLOSED state

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=209471

--- Comment #16 from Robert Blayzor <rblayzor at inoc.net> ---
Sure enough only several minutes later...


netstat -an | grep CLOSE
tcp6       0      0 2607:f058:110:2:.25    2607:f058:110:2:.21636 CLOSED
tcp6       0      0 2607:f058:110:2:.25    2607:f058:110:2:.56257 CLOSED
tcp6       0      0 2607:f058:110:2:.25    2607:f058:110:2:.29702 CLOSED
tcp6       0      0 2607:f058:110:2:.25    2607:f058:110:2:.43568 CLOSED
tcp6       0      0 2607:f058:110:2:.25    2607:f058:110:2:.54536 CLOSED
tcp6       0      0 2607:f058:110:2:.25    2607:f058:110:2:.46349 CLOSED
tcp6       0      0 2607:f058:110:2:.25    2607:f058:110:2:.43627 CLOSED
tcp6       0      0 2607:f058:110:2:.25    2607:f058:110:2:.1415  CLOSED
tcp6       0      0 2607:f058:110:2:.25    2607:f058:110:2:.17268 CLOSED
tcp6       0      0 2607:f058:110:2:.25    2607:f058:110:2:.48771 CLOSED
tcp6       0      0 2607:f058:110:2:.25    2607:f058:110:2:.14033 CLOSED
tcp6       0      0 2607:f058:110:2:.25    2607:f058:110:2:.38239 CLOSED
tcp6       0      0 2607:f058:110:2:.25    2607:f058:110:2:.21242 CLOSED
tcp6       0      0 2607:f058:110:2:.25    2607:f058:110:2:.25488 CLOSED
tcp6       0      0 2607:f058:110:2:.25    2607:f058:110:2:.64057 CLOSED
tcp6       0      0 2607:f058:110:2:.25    2607:f058:110:2:.13191 CLOSED
tcp6       0      0 2607:f058:110:2:.25    2607:f058:10::10.42818 CLOSED
tcp6       0      0 2607:f058:110:2:.25    2607:f058:110:2:.13892 CLOSED
tcp6       0      0 2607:f058:110:2:.25    2607:f058:110:2:.36679 CLOSED
tcp6       0      0 2607:f058:110:2:.25    2607:f058:110:2:.54607 CLOSED
tcp6       0      0 2607:f058:110:2:.25    2607:f058:110:2:.29255 CLOSED
tcp6       0      0 2607:f058:110:2:.25    2607:f058:110:2:.61873 CLOSED
tcp6       0      0 2607:f058:110:2:.25    2607:f058:110:2:.40489 CLOSED
tcp6       0      0 2607:f058:110:2:.25    2607:f058:110:2:.21086 CLOSED
tcp6       0      0 2607:f058:110:2:.25    2607:f058:110:2:.39435 CLOSED
tcp6       0      0 2607:f058:110:2:.25    2607:f058:110:2:.43388 CLOSED
tcp6       0      0 2607:f058:110:2:.25    2607:f058:110:2:.36112 CLOSED
tcp6       0      0 2607:f058:110:2:.25    2607:f058:110:2:.7947  CLOSED
tcp6       0      0 2607:f058:110:2:.25    2607:f058:110:2:.32606 CLOSED
tcp6       0      0 2607:f058:110:2:.25    2607:f058:110:2:.12869 CLOSED
tcp6       0      0 2607:f058:110:2:.25    2607:f058:110:2:.41813 CLOSED


Cannot be killed with tcpdrop...


Exim stuck in:

35876 mailnull      1  20    0 41708K  8184K vmf_de  0   0:12   0.00% exim


and results in:

sonewconn: pcb 0xfffff80015d67000: Listen queue overflow: 31 already in queue
awaiting acceptance (26 occurrences)
sonewconn: pcb 0xfffff80015d67000: Listen queue overflow: 31 already in queue
awaiting acceptance (26 occurrences)
sonewconn: pcb 0xfffff80015d67000: Listen queue overflow: 31 already in queue
awaiting acceptance (26 occurrences)
sonewconn: pcb 0xfffff80015d67000: Listen queue overflow: 31 already in queue
awaiting acceptance (25 occurrences)
sonewconn: pcb 0xfffff80015d67000: Listen queue overflow: 31 already in queue
awaiting acceptance (26 occurrences)



Process does not kill... reboot time...

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