* [ruby-dev:50881] [Ruby master Bug#16413] Net::FTP#put で書き込みエラーが発生した時の CLOSE_WAIT
[not found] <redmine.issue-16413.20191210063750@ruby-lang.org>
@ 2019-12-10 6:37 ` koshigoeb
2019-12-10 10:28 ` [ruby-dev:50882] [Ruby master Bug#16413] Net::FTP#put で書き込みエラーが発生した時のコネクション切断 naruse
2019-12-10 10:54 ` [ruby-dev:50883] " koshigoeb
2 siblings, 0 replies; 3+ messages in thread
From: koshigoeb @ 2019-12-10 6:37 UTC (permalink / raw)
To: ruby-dev
Issue #16413 has been reported by koshigoe (Masataka SUZUKI).
----------------------------------------
Bug #16413: Net::FTP#put で書き込みエラーが発生した時の CLOSE_WAIT
https://bugs.ruby-lang.org/issues/16413
* Author: koshigoe (Masataka SUZUKI)
* Status: Open
* Priority: Normal
* Assignee:
* Target version:
* ruby -v: ruby 2.6.4p104 (2019-08-28 revision 67798) [x86_64-darwin18]
* Backport: 2.5: UNKNOWN, 2.6: UNKNOWN
----------------------------------------
### 疑問
`Net::FTP#storbinary` などをみると、 `conn.write` で例外が発生した際に `conn.close` を呼ばない実装だと思います。
https://github.com/ruby/ruby/blob/7be550d046c726c2a3aa625ceb260d9b2268fb5a/lib/net/ftp.rb#L683-L707
一方で `Net::FTP#retrbinary` では `conn.shutdown` や `conn.close` (`ensure`) をしています。
https://github.com/ruby/ruby/blob/7be550d046c726c2a3aa625ceb260d9b2268fb5a/lib/net/ftp.rb#L629-L648
素人的な質問で恐縮ですが、これは意図的な実装でしょうか？
### 確認内容
適当な FTP サーバを起動。
```
$ docker run --rm \
-p 20-21:20-21 \
-p 21100-21110:21100-21110 \
-e FTP_USER=user \
-e FTP_PASS=pass \
-e PASV_ADDRESS=localhost \
-e PASV_MIN_PORT=21100 \
-e PASV_MAX_PORT=21110 \
fauria/vsftpd
```
irb で `Net::FTP#put` のエラーを繰り返し発生させる。
```
$ ruby -v
ruby 2.6.4p104 (2019-08-28 revision 67798) [x86_64-darwin18]
$ irb -rnet/ftp
> ftp = Net::FTP.new
> ftp.passive = true
> ftp.connect('localhost')
> ftp.login('user', 'pass')
> ftp.put('/dev/null', '/null') # 正常
> ftp.put('/dev/null', '/nil/null') # エラー
... エラーを繰り返してみる ...
```
エラー時は `CLOSE_WAIT`, `FIN_WAIT2` が増えていく。
```
$ lsof -i:21100-21110
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
com.docke 1354 koshigoe 17u IPv6 0x370c967241f8be15 0t0 TCP *:21110 (LISTEN)
com.docke 1354 koshigoe 19u IPv6 0x370c967241f8dad5 0t0 TCP *:21109 (LISTEN)
com.docke 1354 koshigoe 21u IPv6 0x370c967241f8f1d5 0t0 TCP *:21108 (LISTEN)
com.docke 1354 koshigoe 23u IPv6 0x370c967241f8cf55 0t0 TCP *:21107 (LISTEN)
com.docke 1354 koshigoe 25u IPv6 0x370c967241f8e095 0t0 TCP *:21106 (LISTEN)
com.docke 1354 koshigoe 29u IPv6 0x370c967241f8c3d5 0t0 TCP *:21105 (LISTEN)
com.docke 1354 koshigoe 31u IPv6 0x370c967241f8c995 0t0 TCP *:21104 (LISTEN)
com.docke 1354 koshigoe 33u IPv6 0x370c967241f8d515 0t0 TCP *:21103 (LISTEN)
com.docke 1354 koshigoe 35u IPv6 0x370c967241a28e15 0t0 TCP *:21102 (LISTEN)
com.docke 1354 koshigoe 37u IPv6 0x370c967241a28855 0t0 TCP *:21101 (LISTEN)
com.docke 1354 koshigoe 39u IPv6 0x370c967241a2a515 0t0 TCP *:21100 (LISTEN)
com.docke 1354 koshigoe 44u IPv6 0x370c9672385ae1d5 0t0 TCP localhost:21110->localhost:53362 (FIN_WAIT_2)
com.docke 1354 koshigoe 45u IPv6 0x370c9672385ad655 0t0 TCP localhost:21107->localhost:53363 (FIN_WAIT_2)
com.docke 1354 koshigoe 46u IPv6 0x370c9672434e7855 0t0 TCP localhost:21102->localhost:53378 (FIN_WAIT_2)
com.docke 1354 koshigoe 48u IPv6 0x370c9672434e83d5 0t0 TCP localhost:21100->localhost:53379 (FIN_WAIT_2)
com.docke 1354 koshigoe 49u IPv6 0x370c9672434eac15 0t0 TCP localhost:21105->localhost:53380 (FIN_WAIT_2)
com.docke 1354 koshigoe 50u IPv6 0x370c967241f8ec15 0t0 TCP localhost:21108->localhost:53381 (FIN_WAIT_2)
com.docke 1354 koshigoe 51u IPv6 0x370c967241a29f55 0t0 TCP localhost:21107->localhost:53382 (FIN_WAIT_2)
com.docke 1354 koshigoe 52u IPv6 0x370c9672385aa855 0t0 TCP localhost:21109->localhost:53383 (FIN_WAIT_2)
com.docke 1354 koshigoe 53u IPv6 0x370c967255892f55 0t0 TCP localhost:21109->localhost:53384 (FIN_WAIT_2)
ruby 66185 koshigoe 15u IPv6 0x370c9672385adc15 0t0 TCP localhost:53362->localhost:21110 (CLOSE_WAIT)
ruby 66185 koshigoe 16u IPv6 0x370c9672385ab995 0t0 TCP localhost:53363->localhost:21107 (CLOSE_WAIT)
ruby 66185 koshigoe 17u IPv6 0x370c9672434eb1d5 0t0 TCP localhost:53378->localhost:21102 (CLOSE_WAIT)
ruby 66185 koshigoe 18u IPv6 0x370c9672434ea095 0t0 TCP localhost:53379->localhost:21100 (CLOSE_WAIT)
ruby 66185 koshigoe 19u IPv6 0x370c9672434e9515 0t0 TCP localhost:53380->localhost:21105 (CLOSE_WAIT)
ruby 66185 koshigoe 20u IPv6 0x370c967241f8e655 0t0 TCP localhost:53381->localhost:21108 (CLOSE_WAIT)
ruby 66185 koshigoe 21u IPv6 0x370c967241a2b655 0t0 TCP localhost:53382->localhost:21107 (CLOSE_WAIT)
ruby 66185 koshigoe 22u IPv6 0x370c967241a2c1d5 0t0 TCP localhost:53383->localhost:21109 (CLOSE_WAIT)
ruby 66185 koshigoe 23u IPv6 0x370c9672385abf55 0t0 TCP localhost:53384->localhost:21109 (CLOSE_WAIT)
```
--
https://bugs.ruby-lang.org/
^ permalink raw reply [flat|nested] 3+ messages in thread
* [ruby-dev:50882] [Ruby master Bug#16413] Net::FTP#put で書き込みエラーが発生した時のコネクション切断
[not found] <redmine.issue-16413.20191210063750@ruby-lang.org>
2019-12-10 6:37 ` [ruby-dev:50881] [Ruby master Bug#16413] Net::FTP#put で書き込みエラーが発生した時の CLOSE_WAIT koshigoeb
@ 2019-12-10 10:28 ` naruse
2019-12-10 10:54 ` [ruby-dev:50883] " koshigoeb
2 siblings, 0 replies; 3+ messages in thread
From: naruse @ 2019-12-10 10:28 UTC (permalink / raw)
To: ruby-dev
Issue #16413 has been updated by naruse (Yui NARUSE).
履歴を見た感じ特に理由は無さそうですね。
https://github.com/ruby/ruby/pull/2737 で直りますでしょうか
----------------------------------------
Bug #16413: Net::FTP#put で書き込みエラーが発生した時のコネクション切断
https://bugs.ruby-lang.org/issues/16413#change-83065
* Author: koshigoe (Masataka SUZUKI)
* Status: Open
* Priority: Normal
* Assignee:
* Target version:
* ruby -v: ruby 2.6.5p114 (2019-10-01 revision 67812) [x86_64-darwin18]
* Backport: 2.5: UNKNOWN, 2.6: UNKNOWN
----------------------------------------
### 疑問
`Net::FTP#storbinary` などをみると、 `conn.write` で例外が発生した際に `conn.close` を呼ばない実装だと思います。
https://github.com/ruby/ruby/blob/7be550d046c726c2a3aa625ceb260d9b2268fb5a/lib/net/ftp.rb#L683-L707
一方で `Net::FTP#retrbinary` では `conn.shutdown` や `conn.close` (`ensure`) をしています。
https://github.com/ruby/ruby/blob/7be550d046c726c2a3aa625ceb260d9b2268fb5a/lib/net/ftp.rb#L629-L648
素人的な質問で恐縮ですが、これは意図的な実装でしょうか？
### 確認内容
適当な FTP サーバを起動。
```
$ docker run --rm \
-p 20-21:20-21 \
-p 21100-21110:21100-21110 \
-e FTP_USER=user \
-e FTP_PASS=pass \
-e PASV_ADDRESS=localhost \
-e PASV_MIN_PORT=21100 \
-e PASV_MAX_PORT=21110 \
fauria/vsftpd
```
`Net::FTP#put` のエラーを繰り返し発生させる。
```
require 'net/ftp'
def upload
ftp = Net::FTP.new
ftp.read_timeout = 0.1
ftp.passive = true
ftp.connect('localhost')
ftp.login('user', 'pass')
i = 0
ftp.put(__FILE__, '/uploaded', 1) do |data|
i += 1
raise 'Bomb' if i > 3
end
rescue => e
puts e.message
ensure
unless ftp.closed?
ftp.close
puts 'closed.'
end
end
11.times { upload }
puts 'wait'
loop {}
__END__
Bomb
closed.
Net::ReadTimeout with #<Socket:fd 11>
closed.
Net::ReadTimeout with #<Socket:fd 11>
closed.
Net::ReadTimeout with #<Socket:fd 11>
closed.
Net::ReadTimeout with #<Socket:fd 11>
closed.
Net::ReadTimeout with #<Socket:fd 11>
closed.
Net::ReadTimeout with #<Socket:fd 11>
closed.
Net::ReadTimeout with #<Socket:fd 11>
closed.
Net::ReadTimeout with #<Socket:fd 11>
closed.
Net::ReadTimeout with #<Socket:fd 11>
closed.
Net::ReadTimeout with #<Socket:fd 11>
closed.
wait
```
コネクションがたくさん作られる。
```
$ lsof -i:21100-21110
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
com.docke 1354 koshigoe 17u IPv6 0x370c967258b56c15 0t0 TCP *:21110 (LISTEN)
com.docke 1354 koshigoe 19u IPv6 0x370c967258b543d5 0t0 TCP *:21109 (LISTEN)
com.docke 1354 koshigoe 21u IPv6 0x370c967258b56095 0t0 TCP *:21108 (LISTEN)
com.docke 1354 koshigoe 23u IPv6 0x370c967258b55515 0t0 TCP *:21107 (LISTEN)
com.docke 1354 koshigoe 25u IPv6 0x370c967258b53e15 0t0 TCP *:21106 (LISTEN)
com.docke 1354 koshigoe 29u IPv6 0x370c967258b571d5 0t0 TCP *:21105 (LISTEN)
com.docke 1354 koshigoe 31u IPv6 0x370c967256ed8e15 0t0 TCP *:21104 (LISTEN)
com.docke 1354 koshigoe 33u IPv6 0x370c967256edb095 0t0 TCP *:21103 (LISTEN)
com.docke 1354 koshigoe 35u IPv6 0x370c967256edaad5 0t0 TCP *:21102 (LISTEN)
com.docke 1354 koshigoe 37u IPv6 0x370c967256ed93d5 0t0 TCP *:21101 (LISTEN)
com.docke 1354 koshigoe 39u IPv6 0x370c967256ed9f55 0t0 TCP *:21100 (LISTEN)
com.docke 1354 koshigoe 45u IPv6 0x370c967256eda515 0t0 TCP localhost:21105->localhost:61667 (ESTABLISHED)
com.docke 1354 koshigoe 47u IPv6 0x370c967257775655 0t0 TCP localhost:21109->localhost:61669 (ESTABLISHED)
com.docke 1354 koshigoe 49u IPv6 0x370c967257772855 0t0 TCP localhost:21107->localhost:61671 (ESTABLISHED)
com.docke 1354 koshigoe 51u IPv6 0x370c9672434ea655 0t0 TCP localhost:21104->localhost:61673 (ESTABLISHED)
com.docke 1354 koshigoe 53u IPv6 0x370c9672434e9515 0t0 TCP localhost:21106->localhost:61675 (ESTABLISHED)
com.docke 1354 koshigoe 55u IPv6 0x370c967241a2b095 0t0 TCP localhost:21110->localhost:61677 (ESTABLISHED)
com.docke 1354 koshigoe 57u IPv6 0x370c967241a2b655 0t0 TCP localhost:21102->localhost:61679 (ESTABLISHED)
com.docke 1354 koshigoe 59u IPv6 0x370c967241a2c1d5 0t0 TCP localhost:21100->localhost:61681 (ESTABLISHED)
com.docke 1354 koshigoe 61u IPv6 0x370c96725927f995 0t0 TCP localhost:21101->localhost:61683 (ESTABLISHED)
com.docke 1354 koshigoe 63u IPv6 0x370c967259281095 0t0 TCP localhost:21103->localhost:61689 (ESTABLISHED)
com.docke 1354 koshigoe 65u IPv6 0x370c967258b55ad5 0t0 TCP localhost:21108->localhost:61693 (ESTABLISHED)
ruby 75273 koshigoe 13u IPv6 0x370c9672385ae1d5 0t0 TCP localhost:61667->localhost:21105 (ESTABLISHED)
ruby 75273 koshigoe 14u IPv6 0x370c967256ed8855 0t0 TCP localhost:61669->localhost:21109 (ESTABLISHED)
ruby 75273 koshigoe 15u IPv6 0x370c967257773f55 0t0 TCP localhost:61671->localhost:21107 (ESTABLISHED)
ruby 75273 koshigoe 16u IPv6 0x370c9672434eac15 0t0 TCP localhost:61673->localhost:21104 (ESTABLISHED)
ruby 75273 koshigoe 17u IPv6 0x370c9672434e8f55 0t0 TCP localhost:61675->localhost:21106 (ESTABLISHED)
ruby 75273 koshigoe 18u IPv6 0x370c9672434e7855 0t0 TCP localhost:61677->localhost:21110 (ESTABLISHED)
ruby 75273 koshigoe 19u IPv6 0x370c967241a2aad5 0t0 TCP localhost:61679->localhost:21102 (ESTABLISHED)
ruby 75273 koshigoe 20u IPv6 0x370c967241a29995 0t0 TCP localhost:61681->localhost:21100 (ESTABLISHED)
ruby 75273 koshigoe 21u IPv6 0x370c96725927ee15 0t0 TCP localhost:61683->localhost:21101 (ESTABLISHED)
ruby 75273 koshigoe 22u IPv6 0x370c967259281c15 0t0 TCP localhost:61689->localhost:21103 (ESTABLISHED)
ruby 75273 koshigoe 23u IPv6 0x370c967258b56655 0t0 TCP localhost:61693->localhost:21108 (ESTABLISHED)
```
FTP サーバ(vsftpd)のプロセスがたくさん作られる。
```
sh-4.1# ps aux | grep '[v]sftpd'
root 1 0.0 0.0 11368 2440 ? Ss 09:01 0:00 /bin/bash -ex /usr/sbin/run-vsftpd.sh
root 13 0.0 0.1 52184 3864 ? S 09:01 0:00 /usr/sbin/vsftpd /etc/vsftpd/vsftpd.conf
nobody 3158 0.0 0.1 56584 3564 ? Ss 09:30 0:00 /usr/sbin/vsftpd /etc/vsftpd/vsftpd.conf
ftp 3160 0.0 0.0 56684 2432 ? S 09:30 0:00 /usr/sbin/vsftpd /etc/vsftpd/vsftpd.conf
nobody 3161 0.0 0.1 56584 3564 ? Ss 09:30 0:00 /usr/sbin/vsftpd /etc/vsftpd/vsftpd.conf
ftp 3163 0.0 0.0 56608 2432 ? S 09:30 0:00 /usr/sbin/vsftpd /etc/vsftpd/vsftpd.conf
nobody 3164 0.0 0.1 56584 3564 ? Ss 09:30 0:00 /usr/sbin/vsftpd /etc/vsftpd/vsftpd.conf
ftp 3166 0.0 0.0 56608 2432 ? S 09:30 0:00 /usr/sbin/vsftpd /etc/vsftpd/vsftpd.conf
nobody 3167 0.0 0.1 56584 3564 ? Ss 09:30 0:00 /usr/sbin/vsftpd /etc/vsftpd/vsftpd.conf
ftp 3169 0.0 0.0 56608 2432 ? S 09:30 0:00 /usr/sbin/vsftpd /etc/vsftpd/vsftpd.conf
nobody 3170 0.0 0.1 56584 3564 ? Ss 09:30 0:00 /usr/sbin/vsftpd /etc/vsftpd/vsftpd.conf
ftp 3172 0.0 0.0 56608 2432 ? S 09:30 0:00 /usr/sbin/vsftpd /etc/vsftpd/vsftpd.conf
nobody 3173 0.0 0.1 56584 3564 ? Ss 09:30 0:00 /usr/sbin/vsftpd /etc/vsftpd/vsftpd.conf
ftp 3175 0.0 0.0 56608 2432 ? S 09:30 0:00 /usr/sbin/vsftpd /etc/vsftpd/vsftpd.conf
nobody 3176 0.0 0.1 56584 3564 ? Ss 09:30 0:00 /usr/sbin/vsftpd /etc/vsftpd/vsftpd.conf
ftp 3178 0.0 0.0 56608 2432 ? S 09:30 0:00 /usr/sbin/vsftpd /etc/vsftpd/vsftpd.conf
nobody 3179 0.0 0.1 56584 3564 ? Ss 09:30 0:00 /usr/sbin/vsftpd /etc/vsftpd/vsftpd.conf
ftp 3181 0.0 0.0 56608 2432 ? S 09:30 0:00 /usr/sbin/vsftpd /etc/vsftpd/vsftpd.conf
nobody 3182 0.0 0.1 56584 3564 ? Ss 09:30 0:00 /usr/sbin/vsftpd /etc/vsftpd/vsftpd.conf
ftp 3184 0.0 0.0 56608 2432 ? S 09:30 0:00 /usr/sbin/vsftpd /etc/vsftpd/vsftpd.conf
nobody 3185 0.0 0.1 56584 3564 ? Ss 09:30 0:00 /usr/sbin/vsftpd /etc/vsftpd/vsftpd.conf
ftp 3187 0.0 0.0 56608 2432 ? S 09:30 0:00 /usr/sbin/vsftpd /etc/vsftpd/vsftpd.conf
nobody 3188 0.0 0.1 56584 3564 ? Ss 09:30 0:00 /usr/sbin/vsftpd /etc/vsftpd/vsftpd.conf
ftp 3190 0.0 0.0 56608 2432 ? S 09:30 0:00 /usr/sbin/vsftpd /etc/vsftpd/vsftpd.conf
```
--
https://bugs.ruby-lang.org/
^ permalink raw reply [flat|nested] 3+ messages in thread
* [ruby-dev:50883] [Ruby master Bug#16413] Net::FTP#put で書き込みエラーが発生した時のコネクション切断
[not found] <redmine.issue-16413.20191210063750@ruby-lang.org>
2019-12-10 6:37 ` [ruby-dev:50881] [Ruby master Bug#16413] Net::FTP#put で書き込みエラーが発生した時の CLOSE_WAIT koshigoeb
2019-12-10 10:28 ` [ruby-dev:50882] [Ruby master Bug#16413] Net::FTP#put で書き込みエラーが発生した時のコネクション切断 naruse
@ 2019-12-10 10:54 ` koshigoeb
2 siblings, 0 replies; 3+ messages in thread
From: koshigoeb @ 2019-12-10 10:54 UTC (permalink / raw)
To: ruby-dev
Issue #16413 has been updated by koshigoe (Masataka SUZUKI).
ありがとうございます。
アップロード失敗時にコネクションが残らないことが確認できました。
----------------------------------------
Bug #16413: Net::FTP#put で書き込みエラーが発生した時のコネクション切断
https://bugs.ruby-lang.org/issues/16413#change-83066
* Author: koshigoe (Masataka SUZUKI)
* Status: Open
* Priority: Normal
* Assignee:
* Target version:
* ruby -v: ruby 2.6.5p114 (2019-10-01 revision 67812) [x86_64-darwin18]
* Backport: 2.5: UNKNOWN, 2.6: UNKNOWN
----------------------------------------
### 疑問
`Net::FTP#storbinary` などをみると、 `conn.write` で例外が発生した際に `conn.close` を呼ばない実装だと思います。
https://github.com/ruby/ruby/blob/7be550d046c726c2a3aa625ceb260d9b2268fb5a/lib/net/ftp.rb#L683-L707
一方で `Net::FTP#retrbinary` では `conn.shutdown` や `conn.close` (`ensure`) をしています。
https://github.com/ruby/ruby/blob/7be550d046c726c2a3aa625ceb260d9b2268fb5a/lib/net/ftp.rb#L629-L648
素人的な質問で恐縮ですが、これは意図的な実装でしょうか？
### 確認内容
適当な FTP サーバを起動。
```
$ docker run --rm \
-p 20-21:20-21 \
-p 21100-21110:21100-21110 \
-e FTP_USER=user \
-e FTP_PASS=pass \
-e PASV_ADDRESS=localhost \
-e PASV_MIN_PORT=21100 \
-e PASV_MAX_PORT=21110 \
fauria/vsftpd
```
`Net::FTP#put` のエラーを繰り返し発生させる。
```
require 'net/ftp'
def upload
ftp = Net::FTP.new
ftp.read_timeout = 0.1
ftp.passive = true
ftp.connect('localhost')
ftp.login('user', 'pass')
i = 0
ftp.put(__FILE__, '/uploaded', 1) do |data|
i += 1
raise 'Bomb' if i > 3
end
rescue => e
puts e.message
ensure
unless ftp.closed?
ftp.close
puts 'closed.'
end
end
11.times { upload }
puts 'wait'
loop {}
__END__
Bomb
closed.
Net::ReadTimeout with #<Socket:fd 11>
closed.
Net::ReadTimeout with #<Socket:fd 11>
closed.
Net::ReadTimeout with #<Socket:fd 11>
closed.
Net::ReadTimeout with #<Socket:fd 11>
closed.
Net::ReadTimeout with #<Socket:fd 11>
closed.
Net::ReadTimeout with #<Socket:fd 11>
closed.
Net::ReadTimeout with #<Socket:fd 11>
closed.
Net::ReadTimeout with #<Socket:fd 11>
closed.
Net::ReadTimeout with #<Socket:fd 11>
closed.
Net::ReadTimeout with #<Socket:fd 11>
closed.
wait
```
コネクションがたくさん作られる。
```
$ lsof -i:21100-21110
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
com.docke 1354 koshigoe 17u IPv6 0x370c967258b56c15 0t0 TCP *:21110 (LISTEN)
com.docke 1354 koshigoe 19u IPv6 0x370c967258b543d5 0t0 TCP *:21109 (LISTEN)
com.docke 1354 koshigoe 21u IPv6 0x370c967258b56095 0t0 TCP *:21108 (LISTEN)
com.docke 1354 koshigoe 23u IPv6 0x370c967258b55515 0t0 TCP *:21107 (LISTEN)
com.docke 1354 koshigoe 25u IPv6 0x370c967258b53e15 0t0 TCP *:21106 (LISTEN)
com.docke 1354 koshigoe 29u IPv6 0x370c967258b571d5 0t0 TCP *:21105 (LISTEN)
com.docke 1354 koshigoe 31u IPv6 0x370c967256ed8e15 0t0 TCP *:21104 (LISTEN)
com.docke 1354 koshigoe 33u IPv6 0x370c967256edb095 0t0 TCP *:21103 (LISTEN)
com.docke 1354 koshigoe 35u IPv6 0x370c967256edaad5 0t0 TCP *:21102 (LISTEN)
com.docke 1354 koshigoe 37u IPv6 0x370c967256ed93d5 0t0 TCP *:21101 (LISTEN)
com.docke 1354 koshigoe 39u IPv6 0x370c967256ed9f55 0t0 TCP *:21100 (LISTEN)
com.docke 1354 koshigoe 45u IPv6 0x370c967256eda515 0t0 TCP localhost:21105->localhost:61667 (ESTABLISHED)
com.docke 1354 koshigoe 47u IPv6 0x370c967257775655 0t0 TCP localhost:21109->localhost:61669 (ESTABLISHED)
com.docke 1354 koshigoe 49u IPv6 0x370c967257772855 0t0 TCP localhost:21107->localhost:61671 (ESTABLISHED)
com.docke 1354 koshigoe 51u IPv6 0x370c9672434ea655 0t0 TCP localhost:21104->localhost:61673 (ESTABLISHED)
com.docke 1354 koshigoe 53u IPv6 0x370c9672434e9515 0t0 TCP localhost:21106->localhost:61675 (ESTABLISHED)
com.docke 1354 koshigoe 55u IPv6 0x370c967241a2b095 0t0 TCP localhost:21110->localhost:61677 (ESTABLISHED)
com.docke 1354 koshigoe 57u IPv6 0x370c967241a2b655 0t0 TCP localhost:21102->localhost:61679 (ESTABLISHED)
com.docke 1354 koshigoe 59u IPv6 0x370c967241a2c1d5 0t0 TCP localhost:21100->localhost:61681 (ESTABLISHED)
com.docke 1354 koshigoe 61u IPv6 0x370c96725927f995 0t0 TCP localhost:21101->localhost:61683 (ESTABLISHED)
com.docke 1354 koshigoe 63u IPv6 0x370c967259281095 0t0 TCP localhost:21103->localhost:61689 (ESTABLISHED)
com.docke 1354 koshigoe 65u IPv6 0x370c967258b55ad5 0t0 TCP localhost:21108->localhost:61693 (ESTABLISHED)
ruby 75273 koshigoe 13u IPv6 0x370c9672385ae1d5 0t0 TCP localhost:61667->localhost:21105 (ESTABLISHED)
ruby 75273 koshigoe 14u IPv6 0x370c967256ed8855 0t0 TCP localhost:61669->localhost:21109 (ESTABLISHED)
ruby 75273 koshigoe 15u IPv6 0x370c967257773f55 0t0 TCP localhost:61671->localhost:21107 (ESTABLISHED)
ruby 75273 koshigoe 16u IPv6 0x370c9672434eac15 0t0 TCP localhost:61673->localhost:21104 (ESTABLISHED)
ruby 75273 koshigoe 17u IPv6 0x370c9672434e8f55 0t0 TCP localhost:61675->localhost:21106 (ESTABLISHED)
ruby 75273 koshigoe 18u IPv6 0x370c9672434e7855 0t0 TCP localhost:61677->localhost:21110 (ESTABLISHED)
ruby 75273 koshigoe 19u IPv6 0x370c967241a2aad5 0t0 TCP localhost:61679->localhost:21102 (ESTABLISHED)
ruby 75273 koshigoe 20u IPv6 0x370c967241a29995 0t0 TCP localhost:61681->localhost:21100 (ESTABLISHED)
ruby 75273 koshigoe 21u IPv6 0x370c96725927ee15 0t0 TCP localhost:61683->localhost:21101 (ESTABLISHED)
ruby 75273 koshigoe 22u IPv6 0x370c967259281c15 0t0 TCP localhost:61689->localhost:21103 (ESTABLISHED)
ruby 75273 koshigoe 23u IPv6 0x370c967258b56655 0t0 TCP localhost:61693->localhost:21108 (ESTABLISHED)
```
FTP サーバ(vsftpd)のプロセスがたくさん作られる。
```
sh-4.1# ps aux | grep '[v]sftpd'
root 1 0.0 0.0 11368 2440 ? Ss 09:01 0:00 /bin/bash -ex /usr/sbin/run-vsftpd.sh
root 13 0.0 0.1 52184 3864 ? S 09:01 0:00 /usr/sbin/vsftpd /etc/vsftpd/vsftpd.conf
nobody 3158 0.0 0.1 56584 3564 ? Ss 09:30 0:00 /usr/sbin/vsftpd /etc/vsftpd/vsftpd.conf
ftp 3160 0.0 0.0 56684 2432 ? S 09:30 0:00 /usr/sbin/vsftpd /etc/vsftpd/vsftpd.conf
nobody 3161 0.0 0.1 56584 3564 ? Ss 09:30 0:00 /usr/sbin/vsftpd /etc/vsftpd/vsftpd.conf
ftp 3163 0.0 0.0 56608 2432 ? S 09:30 0:00 /usr/sbin/vsftpd /etc/vsftpd/vsftpd.conf
nobody 3164 0.0 0.1 56584 3564 ? Ss 09:30 0:00 /usr/sbin/vsftpd /etc/vsftpd/vsftpd.conf
ftp 3166 0.0 0.0 56608 2432 ? S 09:30 0:00 /usr/sbin/vsftpd /etc/vsftpd/vsftpd.conf
nobody 3167 0.0 0.1 56584 3564 ? Ss 09:30 0:00 /usr/sbin/vsftpd /etc/vsftpd/vsftpd.conf
ftp 3169 0.0 0.0 56608 2432 ? S 09:30 0:00 /usr/sbin/vsftpd /etc/vsftpd/vsftpd.conf
nobody 3170 0.0 0.1 56584 3564 ? Ss 09:30 0:00 /usr/sbin/vsftpd /etc/vsftpd/vsftpd.conf
ftp 3172 0.0 0.0 56608 2432 ? S 09:30 0:00 /usr/sbin/vsftpd /etc/vsftpd/vsftpd.conf
nobody 3173 0.0 0.1 56584 3564 ? Ss 09:30 0:00 /usr/sbin/vsftpd /etc/vsftpd/vsftpd.conf
ftp 3175 0.0 0.0 56608 2432 ? S 09:30 0:00 /usr/sbin/vsftpd /etc/vsftpd/vsftpd.conf
nobody 3176 0.0 0.1 56584 3564 ? Ss 09:30 0:00 /usr/sbin/vsftpd /etc/vsftpd/vsftpd.conf
ftp 3178 0.0 0.0 56608 2432 ? S 09:30 0:00 /usr/sbin/vsftpd /etc/vsftpd/vsftpd.conf
nobody 3179 0.0 0.1 56584 3564 ? Ss 09:30 0:00 /usr/sbin/vsftpd /etc/vsftpd/vsftpd.conf
ftp 3181 0.0 0.0 56608 2432 ? S 09:30 0:00 /usr/sbin/vsftpd /etc/vsftpd/vsftpd.conf
nobody 3182 0.0 0.1 56584 3564 ? Ss 09:30 0:00 /usr/sbin/vsftpd /etc/vsftpd/vsftpd.conf
ftp 3184 0.0 0.0 56608 2432 ? S 09:30 0:00 /usr/sbin/vsftpd /etc/vsftpd/vsftpd.conf
nobody 3185 0.0 0.1 56584 3564 ? Ss 09:30 0:00 /usr/sbin/vsftpd /etc/vsftpd/vsftpd.conf
ftp 3187 0.0 0.0 56608 2432 ? S 09:30 0:00 /usr/sbin/vsftpd /etc/vsftpd/vsftpd.conf
nobody 3188 0.0 0.1 56584 3564 ? Ss 09:30 0:00 /usr/sbin/vsftpd /etc/vsftpd/vsftpd.conf
ftp 3190 0.0 0.0 56608 2432 ? S 09:30 0:00 /usr/sbin/vsftpd /etc/vsftpd/vsftpd.conf
```
--
https://bugs.ruby-lang.org/
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[not found] <redmine.issue-16413.20191210063750@ruby-lang.org>
2019-12-10 6:37 ` [ruby-dev:50881] [Ruby master Bug#16413] Net::FTP#put で書き込みエラーが発生した時の CLOSE_WAIT koshigoeb
2019-12-10 10:28 ` [ruby-dev:50882] [Ruby master Bug#16413] Net::FTP#put で書き込みエラーが発生した時のコネクション切断 naruse
2019-12-10 10:54 ` [ruby-dev:50883] " koshigoeb
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