Cannot kill my lsof processes even as root











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My lsof is hung so bad that I can't even kill -9 it.



Initially, it was owned by another process, foo. I tried killing foo, hoping that lsof would also go way. But while I was able to kill -9 foo, now lsof appears to be owned by `upstart.



root@box 0 L1 ~

$ ps -ef | grep 'lsof|upstart' | grep 3575

joe       1595  3575  0 12:43 pts/5    00:00:00 lsof /home/joe/tmp/a a/file.11

joe       1603  3575  0 12:43 pts/5    00:00:00 lsof /home/joe/tmp/a a/file.13

joe       1605  3575  0 12:43 pts/5    00:00:00 lsof /home/joe/tmp/a a/file.18

joe       1614  3575  0 12:43 pts/5    00:00:00 lsof /home/joe/tmp/a a/file.16

joe       3575  3331  0 Nov26 ?        00:00:01 /sbin/upstart --user

joe       4330  3575  0 12:53 pts/5    00:00:00 lsof /home/joe/tmp/a a/file.18

joe       4353  3575  0 12:54 pts/5    00:00:00 lsof /home/joe/tmp/a a/file.18

joe       4429  3575  0 12:54 pts/5    00:00:00 lsof /home/joe/tmp/a a/file.18

joe       4435  3575  0 12:54 pts/5    00:00:00 lsof /home/joe/tmp/a a/file.11

joe       4580  3575  0 12:55 pts/5    00:00:00 lsof bar


Next, I try to get a list of PIDs of lsof processes.



root@box 130 L1 ~

$ ps -ef | grep lsof | grep -v grep | gawk '{ print $2 }'

1595

1603

1605

1614

4330

4353

4429

4435

4580


I try to kill them all (as root).



root@box 0 L1 ~

$ ps -ef | grep lsof | grep -v grep | gawk '{ print $2 }' | xargs -n1 kill -9


But, they are still "hanging in" there. (pun intended)



root@box 0 L1 ~

$ ps -ef | grep lsof | grep -v grep

joe       1595  3575  0 12:43 pts/5    00:00:00 lsof /home/joe/tmp/a a/file.11

joe       1603  3575  0 12:43 pts/5    00:00:00 lsof /home/joe/tmp/a a/file.13

joe       1605  3575  0 12:43 pts/5    00:00:00 lsof /home/joe/tmp/a a/file.18

joe       1614  3575  0 12:43 pts/5    00:00:00 lsof /home/joe/tmp/a a/file.16

joe       4330  3575  0 12:53 pts/5    00:00:00 lsof /home/joe/tmp/a a/file.18

joe       4353  3575  0 12:54 pts/5    00:00:00 lsof /home/joe/tmp/a a/file.18

joe       4429  3575  0 12:54 pts/5    00:00:00 lsof /home/joe/tmp/a a/file.18

joe       4435  3575  0 12:54 pts/5    00:00:00 lsof /home/joe/tmp/a a/file.11

joe       4580  3575  0 12:55 pts/5    00:00:00 lsof bar


Notes:




  1. All of the above lsof commands were invoked by background tasks inside of foo.


  2. The lsof bar was invoked manually on the shell, and even it hung! I can Ctrl-C out of it. But it continues to show in the ps -ef listing.



Questions:




  1. Why is lsof hanging in the first place? All the files given as arguments to lsof are on a local ext4 filesystem of a Ubuntu 16.04 box.


  2. Why even kill -9 isn't able to kill these processes - even when run as root?


  3. Why I can Ctrl-C an interactively invoked lsof bar just fine but the lsof bar continues to show up in the ps -ef listing?







root kill lsof hang







share|improve this question




















  • 2




    Your second and third questions may find answers here.
    – fra-san
    2 days ago















up vote
0
down vote

favorite












My lsof is hung so bad that I can't even kill -9 it.



Initially, it was owned by another process, foo. I tried killing foo, hoping that lsof would also go way. But while I was able to kill -9 foo, now lsof appears to be owned by `upstart.



root@box 0 L1 ~

$ ps -ef | grep 'lsof|upstart' | grep 3575

joe       1595  3575  0 12:43 pts/5    00:00:00 lsof /home/joe/tmp/a a/file.11

joe       1603  3575  0 12:43 pts/5    00:00:00 lsof /home/joe/tmp/a a/file.13

joe       1605  3575  0 12:43 pts/5    00:00:00 lsof /home/joe/tmp/a a/file.18

joe       1614  3575  0 12:43 pts/5    00:00:00 lsof /home/joe/tmp/a a/file.16

joe       3575  3331  0 Nov26 ?        00:00:01 /sbin/upstart --user

joe       4330  3575  0 12:53 pts/5    00:00:00 lsof /home/joe/tmp/a a/file.18

joe       4353  3575  0 12:54 pts/5    00:00:00 lsof /home/joe/tmp/a a/file.18

joe       4429  3575  0 12:54 pts/5    00:00:00 lsof /home/joe/tmp/a a/file.18

joe       4435  3575  0 12:54 pts/5    00:00:00 lsof /home/joe/tmp/a a/file.11

joe       4580  3575  0 12:55 pts/5    00:00:00 lsof bar


Next, I try to get a list of PIDs of lsof processes.



root@box 130 L1 ~

$ ps -ef | grep lsof | grep -v grep | gawk '{ print $2 }'

1595

1603

1605

1614

4330

4353

4429

4435

4580


I try to kill them all (as root).



root@box 0 L1 ~

$ ps -ef | grep lsof | grep -v grep | gawk '{ print $2 }' | xargs -n1 kill -9


But, they are still "hanging in" there. (pun intended)



root@box 0 L1 ~

$ ps -ef | grep lsof | grep -v grep

joe       1595  3575  0 12:43 pts/5    00:00:00 lsof /home/joe/tmp/a a/file.11

joe       1603  3575  0 12:43 pts/5    00:00:00 lsof /home/joe/tmp/a a/file.13

joe       1605  3575  0 12:43 pts/5    00:00:00 lsof /home/joe/tmp/a a/file.18

joe       1614  3575  0 12:43 pts/5    00:00:00 lsof /home/joe/tmp/a a/file.16

joe       4330  3575  0 12:53 pts/5    00:00:00 lsof /home/joe/tmp/a a/file.18

joe       4353  3575  0 12:54 pts/5    00:00:00 lsof /home/joe/tmp/a a/file.18

joe       4429  3575  0 12:54 pts/5    00:00:00 lsof /home/joe/tmp/a a/file.18

joe       4435  3575  0 12:54 pts/5    00:00:00 lsof /home/joe/tmp/a a/file.11

joe       4580  3575  0 12:55 pts/5    00:00:00 lsof bar


Notes:




  1. All of the above lsof commands were invoked by background tasks inside of foo.


  2. The lsof bar was invoked manually on the shell, and even it hung! I can Ctrl-C out of it. But it continues to show in the ps -ef listing.



Questions:




  1. Why is lsof hanging in the first place? All the files given as arguments to lsof are on a local ext4 filesystem of a Ubuntu 16.04 box.


  2. Why even kill -9 isn't able to kill these processes - even when run as root?


  3. Why I can Ctrl-C an interactively invoked lsof bar just fine but the lsof bar continues to show up in the ps -ef listing?







root kill lsof hang







share|improve this question




















  • 2




    Your second and third questions may find answers here.
    – fra-san
    2 days ago













up vote
0
down vote

favorite









up vote
0
down vote

favorite











My lsof is hung so bad that I can't even kill -9 it.



Initially, it was owned by another process, foo. I tried killing foo, hoping that lsof would also go way. But while I was able to kill -9 foo, now lsof appears to be owned by `upstart.



root@box 0 L1 ~

$ ps -ef | grep 'lsof|upstart' | grep 3575

joe       1595  3575  0 12:43 pts/5    00:00:00 lsof /home/joe/tmp/a a/file.11

joe       1603  3575  0 12:43 pts/5    00:00:00 lsof /home/joe/tmp/a a/file.13

joe       1605  3575  0 12:43 pts/5    00:00:00 lsof /home/joe/tmp/a a/file.18

joe       1614  3575  0 12:43 pts/5    00:00:00 lsof /home/joe/tmp/a a/file.16

joe       3575  3331  0 Nov26 ?        00:00:01 /sbin/upstart --user

joe       4330  3575  0 12:53 pts/5    00:00:00 lsof /home/joe/tmp/a a/file.18

joe       4353  3575  0 12:54 pts/5    00:00:00 lsof /home/joe/tmp/a a/file.18

joe       4429  3575  0 12:54 pts/5    00:00:00 lsof /home/joe/tmp/a a/file.18

joe       4435  3575  0 12:54 pts/5    00:00:00 lsof /home/joe/tmp/a a/file.11

joe       4580  3575  0 12:55 pts/5    00:00:00 lsof bar


Next, I try to get a list of PIDs of lsof processes.



root@box 130 L1 ~

$ ps -ef | grep lsof | grep -v grep | gawk '{ print $2 }'

1595

1603

1605

1614

4330

4353

4429

4435

4580


I try to kill them all (as root).



root@box 0 L1 ~

$ ps -ef | grep lsof | grep -v grep | gawk '{ print $2 }' | xargs -n1 kill -9


But, they are still "hanging in" there. (pun intended)



root@box 0 L1 ~

$ ps -ef | grep lsof | grep -v grep

joe       1595  3575  0 12:43 pts/5    00:00:00 lsof /home/joe/tmp/a a/file.11

joe       1603  3575  0 12:43 pts/5    00:00:00 lsof /home/joe/tmp/a a/file.13

joe       1605  3575  0 12:43 pts/5    00:00:00 lsof /home/joe/tmp/a a/file.18

joe       1614  3575  0 12:43 pts/5    00:00:00 lsof /home/joe/tmp/a a/file.16

joe       4330  3575  0 12:53 pts/5    00:00:00 lsof /home/joe/tmp/a a/file.18

joe       4353  3575  0 12:54 pts/5    00:00:00 lsof /home/joe/tmp/a a/file.18

joe       4429  3575  0 12:54 pts/5    00:00:00 lsof /home/joe/tmp/a a/file.18

joe       4435  3575  0 12:54 pts/5    00:00:00 lsof /home/joe/tmp/a a/file.11

joe       4580  3575  0 12:55 pts/5    00:00:00 lsof bar


Notes:




  1. All of the above lsof commands were invoked by background tasks inside of foo.


  2. The lsof bar was invoked manually on the shell, and even it hung! I can Ctrl-C out of it. But it continues to show in the ps -ef listing.



Questions:




  1. Why is lsof hanging in the first place? All the files given as arguments to lsof are on a local ext4 filesystem of a Ubuntu 16.04 box.


  2. Why even kill -9 isn't able to kill these processes - even when run as root?


  3. Why I can Ctrl-C an interactively invoked lsof bar just fine but the lsof bar continues to show up in the ps -ef listing?







root kill lsof hang







share|improve this question















My lsof is hung so bad that I can't even kill -9 it.



Initially, it was owned by another process, foo. I tried killing foo, hoping that lsof would also go way. But while I was able to kill -9 foo, now lsof appears to be owned by `upstart.



root@box 0 L1 ~

$ ps -ef | grep 'lsof|upstart' | grep 3575

joe       1595  3575  0 12:43 pts/5    00:00:00 lsof /home/joe/tmp/a a/file.11

joe       1603  3575  0 12:43 pts/5    00:00:00 lsof /home/joe/tmp/a a/file.13

joe       1605  3575  0 12:43 pts/5    00:00:00 lsof /home/joe/tmp/a a/file.18

joe       1614  3575  0 12:43 pts/5    00:00:00 lsof /home/joe/tmp/a a/file.16

joe       3575  3331  0 Nov26 ?        00:00:01 /sbin/upstart --user

joe       4330  3575  0 12:53 pts/5    00:00:00 lsof /home/joe/tmp/a a/file.18

joe       4353  3575  0 12:54 pts/5    00:00:00 lsof /home/joe/tmp/a a/file.18

joe       4429  3575  0 12:54 pts/5    00:00:00 lsof /home/joe/tmp/a a/file.18

joe       4435  3575  0 12:54 pts/5    00:00:00 lsof /home/joe/tmp/a a/file.11

joe       4580  3575  0 12:55 pts/5    00:00:00 lsof bar


Next, I try to get a list of PIDs of lsof processes.



root@box 130 L1 ~

$ ps -ef | grep lsof | grep -v grep | gawk '{ print $2 }'

1595

1603

1605

1614

4330

4353

4429

4435

4580


I try to kill them all (as root).



root@box 0 L1 ~

$ ps -ef | grep lsof | grep -v grep | gawk '{ print $2 }' | xargs -n1 kill -9


But, they are still "hanging in" there. (pun intended)



root@box 0 L1 ~

$ ps -ef | grep lsof | grep -v grep

joe       1595  3575  0 12:43 pts/5    00:00:00 lsof /home/joe/tmp/a a/file.11

joe       1603  3575  0 12:43 pts/5    00:00:00 lsof /home/joe/tmp/a a/file.13

joe       1605  3575  0 12:43 pts/5    00:00:00 lsof /home/joe/tmp/a a/file.18

joe       1614  3575  0 12:43 pts/5    00:00:00 lsof /home/joe/tmp/a a/file.16

joe       4330  3575  0 12:53 pts/5    00:00:00 lsof /home/joe/tmp/a a/file.18

joe       4353  3575  0 12:54 pts/5    00:00:00 lsof /home/joe/tmp/a a/file.18

joe       4429  3575  0 12:54 pts/5    00:00:00 lsof /home/joe/tmp/a a/file.18

joe       4435  3575  0 12:54 pts/5    00:00:00 lsof /home/joe/tmp/a a/file.11

joe       4580  3575  0 12:55 pts/5    00:00:00 lsof bar


Notes:




  1. All of the above lsof commands were invoked by background tasks inside of foo.


  2. The lsof bar was invoked manually on the shell, and even it hung! I can Ctrl-C out of it. But it continues to show in the ps -ef listing.



Questions:




  1. Why is lsof hanging in the first place? All the files given as arguments to lsof are on a local ext4 filesystem of a Ubuntu 16.04 box.


  2. Why even kill -9 isn't able to kill these processes - even when run as root?


  3. Why I can Ctrl-C an interactively invoked lsof bar just fine but the lsof bar continues to show up in the ps -ef listing?







root kill lsof hang




root kill lsof hang






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited 2 days ago

























asked 2 days ago









Harry

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3701313








  • 2




    Your second and third questions may find answers here.
    – fra-san
    2 days ago














  • 2




    Your second and third questions may find answers here.
    – fra-san
    2 days ago








2




2




Your second and third questions may find answers here.
– fra-san
2 days ago




Your second and third questions may find answers here.
– fra-san
2 days ago















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この記事は検証可能な参考文献や出典が全く示されていないか、不十分です。 出典を追加して記事の信頼性向上にご協力ください。 （ 2019年1月 ） 「 サソリ 」のその他の用法については「サソリ (曖昧さ回避)」をご覧ください。 「 スコーピオン 」と「 スコルピオン 」はこの項目へ転送されています。その他の用法については「スコーピオン」をご覧ください。 サソリ目 生息年代: 430–0 Ma PreЄ Є O S D C P T J K Pg N シルル紀前期-現世 ダイオウサソリ（ Pandinus Imperator ） 分類 界 : 動物界 Animalia 門 : 節足動物門 Arthropoda 亜門 : 鋏角亜門 Chelicerata 綱 : クモガタ綱 Arachnida 目 : サソリ目 Scorpiones 学名 Scorpiones C. L. Koch, 1837 英名 Scorpion 上科 Pseudochactoidea キョクトウサソリ上科 Buthoidea Chaeriloidea Chactoidea Iuroidea Scorpionoidea サソリ （ サソリ類 、 蠍 、 蝎 、 scorpion ）は、鋏角亜門・クモガタ綱の サソリ目 （ Scorpiones ）に属する節足動物の総称である。体の前端に鋏型の触肢、後端に毒針を有する捕食者である。 1700種以上を含め、最古の化石記録は4億3千万年前のシルル紀まで遡る。有毒生物として広く知られるが、人間の命にかかわる毒を持つものはごく一部の種類に過ぎない。 目次 1 形態 1.1 前体 1.2 後体 1.2.1 中体 1.2.2 終体 2 雌雄 3 生態 3.1 天敵 3.2 生殖 4 分布 5 毒 6 蛍光現象 7 分類
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広島県道265号伴広島線

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一般県道 広島県道265号伴広島線 路線延長 km 起点 広島県広島市安佐南区伴東7丁目 終点 広島県広島市中区榎町 接続する 主な道路 （記法） 広島県道38号広島豊平線 広島県道71号広島湯来線 山陽自動車道五日市IC 国道183号（ 国道261号重複） ■テンプレート（■ノート ■使い方） ■PJ道路 広島県道265号伴広島線 （ひろしまけんどう265ごう ともひろしません）は広島県広島市安佐南区から広島県広島市中区を結ぶ一般県道である。 目次 1 路線データ 2 通過する自治体 3 見どころ 4 接続道路 4.1 本線 4.2 旧道 5 別名 6 関連項目 路線データ 本線 起点：広島市安佐南区伴東7丁目・大原下橋南詰交差点（広島県道38号広島豊平線（本線・旧道）交点） 終点：広島市中区榎町・十日市交差点（国道183号（国道261号重用）交点） 総延長： 旧道 起点：広島市安佐南区伴東4丁目・新細坂交差点（広島県道38号広島豊平線交点） 終点：広島市安佐南区伴中央4丁目・寺組橋(南)交差点（広島県道265号伴広島線（本線）交点） 総延長： 通過する自治体 広島県 広島市（安佐南区、佐伯区、西区、中区） 見どころ 広島高速交通広島新交通1号線（アストラムライン） 広島広域公園 広島広域公園陸上競技場（広島ビッグアーチ） 己斐峠 己斐橋（太田川放水路） 天満橋（天満川） 接続道路 本線 広島県道38号広島豊平線（本線・旧道）（広島市安佐南区伴東7丁目・大原下橋南詰交差点〔起点〕） 広島県道71号広島湯来線（本線）（広島市安佐南区伴中央2丁目・伴交番入口交差点 - 広島市安佐南区伴中央4丁目・寺組橋(南)交差点間で重用） 広島県道71号広島湯来線（旧道）（広島県道265号伴広島線（旧道）重用）（広島市安佐南区伴中央4丁目・寺組橋(南)交差点） 広島県道71号広島湯来線（広島市安佐南区伴中央4丁目・寺組橋(南)交差点 - 広島市佐伯区五日市町石内・五月が丘(南)交差点間で重用）
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Setup Asymptote in Texstudio

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0 Good time of the day! I am trying to compile the following file: documentclass[12pt]{article} usepackage[inline]{asymptote} begin{document} Here is a venn diagram produced with Asymptote, drawn to width 4cm: defA{A} defB{V{B}} begin{figure} begin{center} begin{asy} size(4cm,0); pen colour1=red; pen colour2=green; pair z0=(0,0); pair z1=(-1,0); pair z2=(1,0); real r=1.5; path c1=circle(z1,r); path c2=circle(z2,r); fill(c1,colour1); fill(c2,colour2); picture intersection=new picture; fill(intersection,c1,colour1+colour2); clip(intersection,c2); add(intersection); draw(c1); draw(c2); //draw("$A$",box,z1)
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