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New qpsmtpd-forkserver processes puts a high load on the server #291

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holckj opened this issue Jan 18, 2019 · 3 comments
Open

New qpsmtpd-forkserver processes puts a high load on the server #291

holckj opened this issue Jan 18, 2019 · 3 comments

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@holckj
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holckj commented Jan 18, 2019 •
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Recently, I've had a few incidents where qpsmtpd-forkserver puts a high load on my server.
Usually, the load averages are only a few percent.

Searching for the qpsmtpd-forkserver processes shows that new processes keep turning up, connected to the same, remote IP address.

You can see sample log-files here: https://forums.contribs.org/index.php?topic=53868
@holckj
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holckj commented Jan 18, 2019

I'm sorry for the unreadable log-files in my recent post.

Below you can see an example of the new qpsmtpd-forkserver processes turning up, connected to the same, remote IP address:

28409 ?        S      0:15 /usr/bin/perl -Tw /usr/bin/qpsmtpd-forkserver -u qpsmtpd -l 0.0.0.0 -p 465 -c 10 -m 5
29614 ?        S      0:24 /usr/bin/perl -Tw /usr/bin/qpsmtpd-forkserver -u qpsmtpd -l 0.0.0.0 -p 25 -c 40 -m 5
29999 ?        S      0:00 /usr/bin/qpsmtpd-forkserver [190.64.84.98 : r190-64-84-98.su-static.adinet.com.uy : 09:27:41 2019-01-05]
30000 ?        S      0:00 /usr/bin/qpsmtpd-forkserver [103.207.37.246 : Unknown : 09:27:42 2019-01-05]
...
28409 ?        S      0:15 /usr/bin/perl -Tw /usr/bin/qpsmtpd-forkserver -u qpsmtpd -l 0.0.0.0 -p 465 -c 10 -m 5
29614 ?        S      0:24 /usr/bin/perl -Tw /usr/bin/qpsmtpd-forkserver -u qpsmtpd -l 0.0.0.0 -p 25 -c 40 -m 5
30014 ?        R      0:00 /usr/bin/qpsmtpd-forkserver [103.207.37.246 : Unknown : 09:28:02 2019-01-05]
...
28409 ?        S      0:15 /usr/bin/perl -Tw /usr/bin/qpsmtpd-forkserver -u qpsmtpd -l 0.0.0.0 -p 465 -c 10 -m 5
29614 ?        S      0:24 /usr/bin/perl -Tw /usr/bin/qpsmtpd-forkserver -u qpsmtpd -l 0.0.0.0 -p 25 -c 40 -m 5
30023 ?        R      0:00 /usr/bin/qpsmtpd-forkserver [103.207.37.246 : Unknown : 09:28:16 2019-01-05]
...
28409 ?        S      0:15 /usr/bin/perl -Tw /usr/bin/qpsmtpd-forkserver -u qpsmtpd -l 0.0.0.0 -p 465 -c 10 -m 5
29614 ?        S      0:24 /usr/bin/perl -Tw /usr/bin/qpsmtpd-forkserver -u qpsmtpd -l 0.0.0.0 -p 25 -c 40 -m 5
30030 ?        Z      0:00 [qpsmtpd-forkser] <defunct>
...
28409 ?        S      0:15 /usr/bin/perl -Tw /usr/bin/qpsmtpd-forkserver -u qpsmtpd -l 0.0.0.0 -p 465 -c 10 -m 5
29614 ?        S      0:24 /usr/bin/perl -Tw /usr/bin/qpsmtpd-forkserver -u qpsmtpd -l 0.0.0.0 -p 25 -c 40 -m 5
30034 ?        S      0:00 /usr/bin/qpsmtpd-forkserver [103.207.37.246 : Unknown : 09:28:32 2019-01-05]

And here is sample output from tcpdump, this time with 192.99.7.175 as the remote IP adress

08:42:29.735857 IP 5.103.132.90.smtp > 192.99.7.175.46466: Flags [P.], seq 1384180636:1384180670, ack 219308459, win 115, length 34
        0x0000:  0008 ae8a 2f40 009c 0297 5579 0800 4502  ..../@....Uy..E.
        0x0010:  004a 0134 4000 4006 e7a4 0567 845a c063  .J.4@.@....g.Z.c
        0x0020:  07af 0019 b582 5280 eb9c 0d12 61ab 5018  ......R.....a.P.
        0x0030:  0073 5210 0000 3232 3020 6b61 726f 6c69  .sR...220.karoli
        0x0040:  6e65 2e69 6273 6761 6172 6465 6e2e 646b  ne.ibsgaarden.dk
        0x0050:  2045 534d 5450 0d0a                      .ESMTP..
08:42:29.831910 IP 192.99.7.175.46466 > 5.103.132.90.smtp: Flags [P.], seq 1:15, ack 34, win 256, length 14
        0x0000:  009c 0297 5579 0008 ae8a 2f40 0800 4502  ....Uy..../@..E.
        0x0010:  0036 5635 4000 6906 69b7 c063 07af 0567  .6V5@.i.i..c...g
        0x0020:  845a b582 0019 0d12 61ab 5280 ebbe 5018  .Z......a.R...P.
        0x0030:  0100 5049 0000 4548 4c4f 2055 4a54 4f73  ..PI..EHLO.UJTOs
        0x0040:  514b 0d0a                                QK..
08:42:29.832016 IP 5.103.132.90.smtp > 192.99.7.175.46466: Flags [.], ack 15, win 115, length 0
        0x0000:  0008 ae8a 2f40 009c 0297 5579 0800 4500  ..../@....Uy..E.
        0x0010:  0028 0135 4000 4006 e7c7 0567 845a c063  .(.5@.@....g.Z.c
        0x0020:  07af 0019 b582 5280 ebbe 0d12 61b9 5010  ......R.....a.P.
        0x0030:  0073 fae7 0000                           .s....
08:42:29.834926 IP 5.103.132.90.smtp > 192.99.7.175.46466: Flags [P.], seq 34:159, ack 15, win 115, length 125
        0x0000:  0008 ae8a 2f40 009c 0297 5579 0800 4502  ..../@....Uy..E.
        0x0010:  00a5 0136 4000 4006 e747 0567 845a c063  ...6@.@..G.g.Z.c
        0x0020:  07af 0019 b582 5280 ebbe 0d12 61b9 5018  ......R.....a.P.
        0x0030:  0073 526b 0000 3235 302d 6962 7367 6161  .sRk..250-ibsgaa
        0x0040:  7264 656e 2e64 6b20 4869 206e 7335 3038  rden.dk.Hi.ns508
        0x0050:  3037 332e 6970 2d31 3932 2d39 392d 372e  073.ip-192-99-7.
        0x0060:  6e65 7420 5b31 3932 2e39 392e 372e 3137  net.[192.99.7.17
        0x0070:  355d 0d0a 3235 302d 5049 5045 4c49 4e49  5]..250-PIPELINI
        0x0080:  4e47 0d0a 3235 302d 3842 4954 4d49 4d45  NG..250-8BITMIME
        0x0090:  0d0a 3235 302d 5349 5a45 2035 3030 3030  ..250-SIZE.50000
        0x00a0:  3030 300d 0a32 3530 2053 5441 5254 544c  000..250.STARTTL
        0x00b0:  530d 0a                                  S..
08:42:29.951556 IP 192.99.7.175.46466 > 5.103.132.90.smtp: Flags [P.], seq 15:27, ack 159, win 256, length 12
        0x0000:  009c 0297 5579 0008 ae8a 2f40 0800 4502  ....Uy..../@..E.
        0x0010:  0034 5636 4000 6906 69b8 c063 07af 0567  .4V6@.i.i..c...g
        0x0020:  845a b582 0019 0d12 61b9 5280 ec3b 5018  .Z......a.R..;P.
        0x0030:  0100 9e40 0000 4155 5448 204c 4f47 494e  ...@..AUTH.LOGIN
        0x0040:  0d0a                                     ..
08:42:29.952540 IP 5.103.132.90.smtp > 192.99.7.175.46466: Flags [P.], seq 159:185, ack 27, win 115, length 26
        0x0000:  0008 ae8a 2f40 009c 0297 5579 0800 4502  ..../@....Uy..E.
        0x0010:  0042 0137 4000 4006 e7a9 0567 845a c063  .B.7@.@....g.Z.c
        0x0020:  07af 0019 b582 5280 ec3b 0d12 61c5 5018  ......R..;..a.P.
        0x0030:  0073 5208 0000 3530 3020 556e 7265 636f  .sR...500.Unreco
        0x0040:  676e 697a 6564 2063 6f6d 6d61 6e64 0d0a  gnized.command..
08:42:30.048946 IP 192.99.7.175.46466 > 5.103.132.90.smtp: Flags [F.], seq 27, ack 185, win 255, length 0
        0x0000:  009c 0297 5579 0008 ae8a 2f40 0800 4500  ....Uy..../@..E.
        0x0010:  0028 5637 4000 6906 69c5 c063 07af 0567  .(V7@.i.i..c...g
        0x0020:  845a b582 0019 0d12 61c5 5280 ec55 5011  .Z......a.R..UP.
        0x0030:  00ff f9b7 0000 0000 0000 0000            ............
08:42:30.067676 IP 5.103.132.90.smtp > 192.99.7.175.46466: Flags [F.], seq 185, ack 28, win 115, length 0
        0x0000:  0008 ae8a 2f40 009c 0297 5579 0800 4500  ..../@....Uy..E.
        0x0010:  0028 0138 4000 4006 e7c4 0567 845a c063  .(.8@.@....g.Z.c
        0x0020:  07af 0019 b582 5280 ec55 0d12 61c6 5011  ......R..U..a.P.
        0x0030:  0073 fa42 0000                           .s.B..
08:42:30.132882 IP 192.99.7.175.59841 > 5.103.132.90.smtp: Flags [SEW], seq 4153497208, win 8192, options [mss 1460,nop,wscale 8,nop,nop,sackOK], length 0
        0x0000:  009c 0297 5579 0008 ae8a 2f40 0800 4500  ....Uy..../@..E.
        0x0010:  0034 5638 4000 6a06 68b8 c063 07af 0567  .4V8@.j.h..c...g
        0x0020:  845a e9c1 0019 f791 5678 0000 0000 80c2  .Z......Vx......
        0x0030:  2000 c497 0000 0204 05b4 0103 0308 0101  ................
        0x0040:  0402                                     ..
08:42:30.132960 IP 5.103.132.90.smtp > 192.99.7.175.59841: Flags [S.E], seq 359390978, ack 4153497209, win 14600, options [mss 1460,nop,nop,sackOK,nop,wscale 7], length 0
        0x0000:  0008 ae8a 2f40 009c 0297 5579 0800 4500  ..../@....Uy..E.
        0x0010:  0034 0000 4000 4006 e8f0 0567 845a c063  .4..@.@....g.Z.c
        0x0020:  07af 0019 e9c1 156b df02 f791 5679 8052  .......k....Vy.R
        0x0030:  3908 b791 0000 0204 05b4 0101 0402 0103  9...............
        0x0040:  0307                                     ..
08:42:30.163693 IP 192.99.7.175.46466 > 5.103.132.90.smtp: Flags [.], ack 186, win 255, length 0
        0x0000:  009c 0297 5579 0008 ae8a 2f40 0800 4500  ....Uy..../@..E.
        0x0010:  0028 5639 4000 6906 69c3 c063 07af 0567  .(V9@.i.i..c...g
        0x0020:  845a b582 0019 0d12 61c6 5280 ec56 5010  .Z......a.R..VP.
        0x0030:  00ff f9b6 0000 0000 0000 0000            ............
08:42:30.233249 IP 192.99.7.175.59841 > 5.103.132.90.smtp: Flags [.], ack 1, win 256, length 0
        0x0000:  009c 0297 5579 0008 ae8a 2f40 0800 4500  ....Uy..../@..E.
        0x0010:  0028 563a 4000 6a06 68c2 c063 07af 0567  .(V:@.j.h..c...g
        0x0020:  845a e9c1 0019 f791 5679 156b df03 5010  .Z......Vy.k..P.
        0x0030:  0100 30ac 0000 0000 0000 0000            ..0.........
08:42:31.623741 IP 5.103.132.90.smtp > 192.99.7.175.59841: Flags [P.], seq 1:35, ack 1, win 115, length 34
        0x0000:  0008 ae8a 2f40 009c 0297 5579 0800 4502  ..../@....Uy..E.
        0x0010:  004a 2d04 4000 4006 bbd4 0567 845a c063  .J-.@.@....g.Z.c
        0x0020:  07af 0019 e9c1 156b df03 f791 5679 5018  .......k....VyP.
        0x0030:  0073 5210 0000 3232 3020 6b61 726f 6c69  .sR...220.karoli
        0x0040:  6e65 2e69 6273 6761 6172 6465 6e2e 646b  ne.ibsgaarden.dk
        0x0050:  2045 534d 5450 0d0a                      .ESMTP..
08:42:31.724155 IP 192.99.7.175.59841 > 5.103.132.90.smtp: Flags [P.], seq 1:17, ack 35, win 256, length 16
        0x0000:  009c 0297 5579 0008 ae8a 2f40 0800 4500  ....Uy..../@..E.
        0x0010:  0038 563b 4000 6a06 68b1 c063 07af 0567  .8V;@.j.h..c...g
        0x0020:  845a e9c1 0019 f791 5679 156b df25 5018  .Z......Vy.k.%P.
        0x0030:  0100 d9b3 0000 4548 4c4f 2066 6578 6b66  ......EHLO.fexkf
        0x0040:  5962 6d75 0d0a                           Ybmu..
08:42:31.724261 IP 5.103.132.90.smtp > 192.99.7.175.59841: Flags [.], ack 17, win 115, length 0
        0x0000:  0008 ae8a 2f40 009c 0297 5579 0800 4500  ..../@....Uy..E.
        0x0010:  0028 2d05 4000 4006 bbf7 0567 845a c063  .(-.@.@....g.Z.c
        0x0020:  07af 0019 e9c1 156b df25 f791 5689 5010  .......k.%..V.P.
        0x0030:  0073 3107 0000                           .s1...
08:42:31.727179 IP 5.103.132.90.smtp > 192.99.7.175.59841: Flags [P.], seq 35:160, ack 17, win 115, length 125
        0x0000:  0008 ae8a 2f40 009c 0297 5579 0800 4502  ..../@....Uy..E.
        0x0010:  00a5 2d06 4000 4006 bb77 0567 845a c063  ..-.@.@..w.g.Z.c
        0x0020:  07af 0019 e9c1 156b df25 f791 5689 5018  .......k.%..V.P.
        0x0030:  0073 526b 0000 3235 302d 6962 7367 6161  .sRk..250-ibsgaa
        0x0040:  7264 656e 2e64 6b20 4869 206e 7335 3038  rden.dk.Hi.ns508
        0x0050:  3037 332e 6970 2d31 3932 2d39 392d 372e  073.ip-192-99-7.
        0x0060:  6e65 7420 5b31 3932 2e39 392e 372e 3137  net.[192.99.7.17
        0x0070:  355d 0d0a 3235 302d 5049 5045 4c49 4e49  5]..250-PIPELINI
        0x0080:  4e47 0d0a 3235 302d 3842 4954 4d49 4d45  NG..250-8BITMIME
        0x0090:  0d0a 3235 302d 5349 5a45 2035 3030 3030  ..250-SIZE.50000
        0x00a0:  3030 300d 0a32 3530 2053 5441 5254 544c  000..250.STARTTL
        0x00b0:  530d 0a                                  S..
08:42:31.827647 IP 192.99.7.175.59841 > 5.103.132.90.smtp: Flags [P.], seq 17:29, ack 160, win 256, length 12
        0x0000:  009c 0297 5579 0008 ae8a 2f40 0800 4500  ....Uy..../@..E.
        0x0010:  0034 563c 4000 6a06 68b4 c063 07af 0567  .4V<@.j.h..c...g
        0x0020:  845a e9c1 0019 f791 5689 156b dfa2 5018  .Z......V..k..P.
        0x0030:  0100 d45f 0000 4155 5448 204c 4f47 494e  ..._..AUTH.LOGIN
        0x0040:  0d0a                                     ..
08:42:31.828641 IP 5.103.132.90.smtp > 192.99.7.175.59841: Flags [P.], seq 160:186, ack 29, win 115, length 26
        0x0000:  0008 ae8a 2f40 009c 0297 5579 0800 4502  ..../@....Uy..E.
        0x0010:  0042 2d07 4000 4006 bbd9 0567 845a c063  .B-.@.@....g.Z.c
        0x0020:  07af 0019 e9c1 156b dfa2 f791 5695 5018  .......k....V.P.
        0x0030:  0073 5208 0000 3530 3020 556e 7265 636f  .sR...500.Unreco
        0x0040:  676e 697a 6564 2063 6f6d 6d61 6e64 0d0a  gnized.command..
08:42:31.929098 IP 192.99.7.175.59841 > 5.103.132.90.smtp: Flags [F.], seq 29, ack 186, win 255, length 0
        0x0000:  009c 0297 5579 0008 ae8a 2f40 0800 4500  ....Uy..../@..E.
        0x0010:  0028 563d 4000 6a06 68bf c063 07af 0567  .(V=@.j.h..c...g
        0x0020:  845a e9c1 0019 f791 5695 156b dfbc 5011  .Z......V..k..P.
        0x0030:  00ff 2fd7 0000 0000 0000 0000            ../.........
08:42:31.947704 IP 5.103.132.90.smtp > 192.99.7.175.59841: Flags [F.], seq 186, ack 30, win 115, length 0
        0x0000:  0008 ae8a 2f40 009c 0297 5579 0800 4500  ..../@....Uy..E.
        0x0010:  0028 2d08 4000 4006 bbf4 0567 845a c063  .(-.@.@....g.Z.c
        0x0020:  07af 0019 e9c1 156b dfbc f791 5696 5011  .......k....V.P.
        0x0030:  0073 3062 0000                           .s0b..
08:42:32.048059 IP 192.99.7.175.59841 > 5.103.132.90.smtp: Flags [.], ack 187, win 255, length 0
        0x0000:  009c 0297 5579 0008 ae8a 2f40 0800 4500  ....Uy..../@..E.
        0x0010:  0028 563e 4000 6a06 68be c063 07af 0567  .(V>@.j.h..c...g
        0x0020:  845a e9c1 0019 f791 5696 156b dfbd 5010  .Z......V..k..P.
        0x0030:  00ff 2fd6 0000 0000 0000 0000            ../.........

@holckj holckj closed this as completed Jan 18, 2019
@holckj holckj reopened this Jan 18, 2019
@glenstewart
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I have also seen a high-load situation, perhaps similar to this. This happens repeatedly when using he.net's IPV6 Administrator Email send at https://ipv6.he.net/certification/cert-main.php

After sending the email (each of which fails on RCPTO), each try gives a high-load qpsmtpd-forkserver process that lingers seemingly forever. This is using QPSMTPD .94

@wornet-aer
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@holckj & @glenstewart: Does this still happen when using the 1.0.0 version of QPSMTPD or the current git master branch?

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@glenstewart @holckj @wornet-aer