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[Bug 65689] proxy connections to target left in CLOSE_WAIT state
bugzilla at apache
Nov 22, 2021, 6:48 AM
Post #1 of 9 (476 views)
Permalink
https://bz.apache.org/bugzilla/show_bug.cgi?id=65689

Piotr Staszeski <tech@axit.pl> changed:

What |Removed |Added
----------------------------------------------------------------------------
OS| |All

--- Comment #1 from Piotr Staszeski <tech@axit.pl> ---
pstack 27036
#0 0x00007f4e0ac060c3 in __epoll_wait_nocancel () from /lib64/libc.so.6
#1 0x00007f4e0b758a59 in ?? ()
#2 0x00007ffcdd3b13fc in ?? ()
#3 0x00007ffcdd3b14a4 in ?? ()
#4 0x00007ffcdd3b14a8 in ?? ()
#5 0x0000000001bb9b98 in ?? ()
#6 0x0000000001bb9cd8 in ?? ()
#7 0x0000000001bb9b80 in ?? ()
#8 0xffffffffffffffff in ?? ()
#9 0x00007ffcdd3b14a4 in ?? ()
#10 0x0000000001bb9ca8 in ?? ()
#11 0x0000000001bb9cd8 in ?? ()
#12 0x00007ffcdd3b14a8 in ?? ()
#13 0x00007f4e092b1721 in ?? ()
#14 0x0000000001b99a98 in ?? ()
#15 0x0000000001bace78 in ?? ()
#16 0x0000000001b994c0 in ?? ()
#17 0x00007ffcdd3b1540 in ?? ()
#18 0x0000000001bb9cd8 in ?? ()
#19 0x00007f4e0b753283 in ?? ()
#20 0x0000000001bb7e20 in ?? ()
#21 0x0000000001b994c0 in ?? ()
#22 0x0000000001bb9ca0 in ?? ()
#23 0x0000000001bb9b80 in ?? ()
#24 0x0000000001bb9b38 in ?? ()
#25 0xffffffffffffffff in ?? ()
#26 0x00007ffcdd3b14a4 in ?? ()
#27 0x00007ffcdd3b14a8 in ?? ()
#28 0x0000000001b99040 in ?? ()
#29 0x0000000001bb9c40 in ?? ()
#30 0x0000000001b99040 in ?? ()
#31 0x0000000001bb9af8 in ?? ()
#32 0x0000000001b994c0 in ?? ()
#33 0x0000000001b99040 in ?? ()
#34 0x00007ffcdd3b15b0 in ?? ()
#35 0x0000000001bb7e20 in ?? ()
#36 0x0000000000440910 in ?? () at util_filter.c:593
#37 0x00007f4e09094f35 in ?? ()
#38 0x0000000001b7bc68 in ?? ()
#39 0x00007f4e0b7477d7 in ?? ()
#40 0x0000000000000000 in ?? ()

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[Bug 65689] proxy connections to target left in CLOSE_WAIT state [ In reply to ]
bugzilla at apache
Nov 22, 2021, 6:50 AM
Post #2 of 9 (476 views)
Permalink
https://bz.apache.org/bugzilla/show_bug.cgi?id=65689

--- Comment #2 from Piotr Staszeski <tech@axit.pl> ---
(In reply to Piotr Staszeski from comment #1)
> pstack 27036

missclick - @Lothar do You also see related FIN_WAIT2 connections? Maybe You
observe same issues as I in Bug 65662

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[Bug 65689] proxy connections to target left in CLOSE_WAIT state [ In reply to ]
bugzilla at apache
Nov 22, 2021, 6:53 AM
Post #3 of 9 (476 views)
Permalink
https://bz.apache.org/bugzilla/show_bug.cgi?id=65689

Piotr Staszeski <tech@axit.pl> changed:

What |Removed |Added
----------------------------------------------------------------------------
CC| |tech@axit.pl

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[Bug 65689] proxy connections to target left in CLOSE_WAIT state [ In reply to ]
bugzilla at apache
Nov 22, 2021, 7:10 AM
Post #4 of 9 (476 views)
Permalink
https://bz.apache.org/bugzilla/show_bug.cgi?id=65689

--- Comment #3 from Yann Ylavic <ylavic.dev@gmail.com> ---
(In reply to Lothar from comment #0)
> Also the behavior has changed, with apache 2.4.46 the connection was closed
> smoothly:
> apache -> target ACK
> target -> apache FIN,ACK
> apache -> target ACK
> apache -> target FIN,ACK
>
> With apache 2.4.51 the last FIN,ACK is not sent anymore but we receive
> target -> apache RST, ACK after 10 sec.

What happens to the connection on the client side when the target/backend
server initiates connection close like the above?

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[Bug 65689] proxy connections to target left in CLOSE_WAIT state [ In reply to ]
bugzilla at apache
Nov 22, 2021, 7:19 AM
Post #5 of 9 (476 views)
Permalink
https://bz.apache.org/bugzilla/show_bug.cgi?id=65689

Yann Ylavic <ylavic.dev@gmail.com> changed:

What |Removed |Added
----------------------------------------------------------------------------
Resolution|--- |DUPLICATE
Status|NEW |RESOLVED

--- Comment #4 from Yann Ylavic <ylavic.dev@gmail.com> ---
Let's track this at a single place (bug 65662) since the reports look very
similar.

*** This bug has been marked as a duplicate of bug 65662 ***

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[Bug 65689] proxy connections to target left in CLOSE_WAIT state [ In reply to ]
bugzilla at apache
Nov 23, 2021, 12:12 AM
Post #6 of 9 (476 views)
Permalink
https://bz.apache.org/bugzilla/show_bug.cgi?id=65689

--- Comment #5 from Lothar <lothar.webmin@gmail.com> ---
Created attachment 38100
--> https://bz.apache.org/bugzilla/attachment.cgi?id=38100&action=edit
Trace8 Log filtered by one PID, serving the Request IP-Addresses/hostnames
anonymised (

Trace8 Log filtered by one PID, which was serving the Request
IP-Addresses/hostnames anonymised

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[Bug 65689] proxy connections to target left in CLOSE_WAIT state [ In reply to ]
bugzilla at apache
Nov 23, 2021, 12:16 AM
Post #7 of 9 (476 views)
Permalink
https://bz.apache.org/bugzilla/show_bug.cgi?id=65689

--- Comment #6 from Lothar <lothar.webmin@gmail.com> ---
(In reply to Piotr Staszeski from comment #2)
> (In reply to Piotr Staszeski from comment #1)
> > pstack 27036
>
> missclick - @Lothar do You also see related FIN_WAIT2 connections? Maybe You
> observe same issues as I in Bug 65662

The Connection switches immediately from ESTABLISHED into CLOSE_WAIT state

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[Bug 65689] proxy connections to target left in CLOSE_WAIT state [ In reply to ]
bugzilla at apache
Nov 23, 2021, 12:19 AM
Post #8 of 9 (476 views)
Permalink
https://bz.apache.org/bugzilla/show_bug.cgi?id=65689

Lothar <lothar.webmin@gmail.com> changed:

What |Removed |Added
----------------------------------------------------------------------------
Resolution|DUPLICATE |---
Status|RESOLVED |REOPENED

--- Comment #7 from Lothar <lothar.webmin@gmail.com> ---
(In reply to Yann Ylavic from comment #3)
> (In reply to Lothar from comment #0)
> > Also the behavior has changed, with apache 2.4.46 the connection was closed
> > smoothly:
> > apache -> target ACK
> > target -> apache FIN,ACK
> > apache -> target ACK
> > apache -> target FIN,ACK
> >
> > With apache 2.4.51 the last FIN,ACK is not sent anymore but we receive
> > target -> apache RST, ACK after 10 sec.
>
> What happens to the connection on the client side when the target/backend
> server initiates connection close like the above?

The Client receives a 200 OK and everything on client side is OK

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[Bug 65689] proxy connections to target left in CLOSE_WAIT state [ In reply to ]
bugzilla at apache
Nov 23, 2021, 9:28 AM
Post #9 of 9 (476 views)
Permalink
https://bz.apache.org/bugzilla/show_bug.cgi?id=65689

Yann Ylavic <ylavic.dev@gmail.com> changed:

What |Removed |Added
----------------------------------------------------------------------------
Status|REOPENED |RESOLVED
Resolution|--- |DUPLICATE

--- Comment #8 from Yann Ylavic <ylavic.dev@gmail.com> ---


*** This bug has been marked as a duplicate of bug 65662 ***

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