dovecot - hijiri-0404's blog

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pop3_lock_session = yes

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※maildir 形式は以下の URL で構築

http://dokonoumanohone.blog47.fc2.com/blog-entry-7.html

postfix, dovecotのインストールと MailDir の使用

・mbox 形式

→dovecot (以下の pop3) が mbox (/var/spool/mail/hijiri) に書き込みロックをかける

1番目のプロセスが終了するまで、2番目のプロセスは応答なし

pop3 3465 hijiri 6uW REG 253,0 757 3409176 /var/spool/mail/hijiri

W for a write lock on the entire file;

tqdovecot(3437)qwqdovecot-auth(3438)

x tqimap-login(3443)

x tqimap-login(3444)

x tqimap-login(3445)

x tqpop3(3465)

^^^^^^^^^^

x tqpop3-login(3440)

x tqpop3-login(3441)

x mqpop3-login(3463)

tqeggcups(2828)

・maildir

→2番目のプロセスは 2 分でタイムアウト

1番目のプロセスも数分するとタイムアウトになる

[test01@HIJIRI01 ~]$ telnet localhost 110

Trying 127.0.0.1...

Connected to localhost.localdomain (127.0.0.1).

Escape character is '^]'.

+OK Dovecot ready.

pass hijiri

-ERR No username given.

user test01

+OK

pass hijiri

+OK Logged in.

list

-ERR [IN-USE] Couldn't open INBOX: Timeout while waiting for lock

Connection closed by foreign host.

[test01@HIJIRI01 ~]$

→おそらく以下のとおり約2分

Apr 30 21:26:13 HIJIRI01 postfix/qmgr[4333]: AC2F034803A: removed

Apr 30 21:49:16 HIJIRI01 dovecot: pop3-login: Login: user=<test01>, method=PLAIN, rip=::ffff:127.0.0.1, lip=::ffff:127.0.0.1, secured

Apr 30 21:49:27 HIJIRI01 dovecot: pop3-login: Login: user=<test01>, method=PLAIN, rip=::ffff:127.0.0.1, lip=::ffff:127.0.0.1, secured★

Apr 30 21:51:29 HIJIRI01 dovecot: POP3(test01): Couldn't open INBOX: Timeout while waiting for lock★

Apr 30 21:51:29 HIJIRI01 dovecot: POP3(test01): Couldn't open INBOX top=0/0, retr=0/0, del=0/0, size=0★

Apr 30 21:59:26 HIJIRI01 dovecot: POP3(test01): Disconnected for inactivity top=0/0, retr=0/0, del=0/4, size=2729※1つめのpop3が終了

→先に接続した pop3 が mbox と違い、書き込みロックをかけてはいない

[root@HIJIRI01 test01]# pstree -p| grep pop3

| |-pop3(27593)

| |-pop3(27598)

| |-pop3-login(4376)

| |-pop3-login(4436)

| `-pop3-login(27596)

[root@HIJIRI01 test01]#

[root@HIJIRI01 test01]# lsof | grep 27593

pop3 27593 test01 cwd DIR 253,0 4096 851983 /home/test01

pop3 27593 test01 rtd DIR 253,0 4096 2 /

pop3 27593 test01 txt REG 253,0 560080 1869202 /usr/libexec/dovecot/pop3

pop3 27593 test01 mem REG 253,0 125736 3999293 /lib/ld-2.5.so

pop3 27593 test01 mem REG 253,0 1611564 3999294 /lib/libc-2.5.so

pop3 27593 test01 mem REG 253,0 16428 3999299 /lib/libdl-2.5.so

pop3 27593 test01 mem REG 253,0 46680 3997736 /lib/libnss_files-2.5.so

pop3 27593 test01 mem REG 253,0 16384 852002 /home/test01/Maildir/dovecot.index.cache

pop3 27593 test01 mem-R REG 253,0 192 852003 /home/test01/Maildir/dovecot.index

pop3 27593 test01 mem REG 253,0 308 852000 /home/test01/Maildir/dovecot.index.log

pop3 27593 test01 0u IPv6 53643 TCP HIJIRI01:pop3->HIJIRI01:41855 (ESTABLISHED)

pop3 27593 test01 1u IPv6 53643 TCP HIJIRI01:pop3->HIJIRI01:41855 (ESTABLISHED)

pop3 27593 test01 2w FIFO 0,6 53659 pipe

pop3 27593 test01 3r CHR 1,9 696 /dev/urandom

pop3 27593 test01 4r FIFO 0,6 53662 pipe

pop3 27593 test01 5w FIFO 0,6 53662 pipe

pop3 27593 test01 6u REG 253,0 194 852004 /home/test01/Maildir/temp.HIJIRI01.27593.0833f7d09d6746b3 (deleted)

pop3 27593 test01 7uR REG 253,0 192 852003 /home/test01/Maildir/dovecot.index

pop3 27593 test01 8u REG 253,0 308 852000 /home/test01/Maildir/dovecot.index.log

pop3 27593 test01 9u REG 253,0 16384 852002 /home/test01/Maildir/dovecot.index.cache

[root@HIJIRI01 test01]# lsof | grep 27598

pop3 27598 test01 cwd DIR 253,0 4096 851983 /home/test01

pop3 27598 test01 rtd DIR 253,0 4096 2 /

pop3 27598 test01 txt REG 253,0 560080 1869202 /usr/libexec/dovecot/pop3

pop3 27598 test01 mem REG 253,0 125736 3999293 /lib/ld-2.5.so

pop3 27598 test01 mem REG 253,0 1611564 3999294 /lib/libc-2.5.so

pop3 27598 test01 mem REG 253,0 16428 3999299 /lib/libdl-2.5.so

pop3 27598 test01 mem REG 253,0 46680 3997736 /lib/libnss_files-2.5.so

pop3 27598 test01 0u IPv6 53671 TCP HIJIRI01:pop3->HIJIRI01:41856 (ESTABLISHED)

pop3 27598 test01 1u IPv6 53671 TCP HIJIRI01:pop3->HIJIRI01:41856 (ESTABLISHED)

pop3 27598 test01 2w FIFO 0,6 53687 pipe

pop3 27598 test01 3r CHR 1,9 696 /dev/urandom

pop3 27598 test01 4r FIFO 0,6 53690 pipe

pop3 27598 test01 5w FIFO 0,6 53690 pipe

[root@HIJIRI01 test01]#

→他のプロセスも同様

ただし、/home/test01/Maildir/dovecot.index に読込ロックあり

[root@HIJIRI01 ~]#

[root@HIJIRI01 ~]# lsof | grep test01

bash 4384 test01 cwd DIR 253,0 4096 851983 /home/test01

bash 4384 test01 rtd DIR 253,0 4096 2 /

bash 4384 test01 txt REG 253,0 729292 1703939 /bin/bash

bash 4384 test01 mem REG 253,0 46680 3997736 /lib/libnss_files-2.5.so

bash 4384 test01 mem REG 253,0 3997720 /lib/libc-2.5.so (path inode=3999294)

bash 4384 test01 mem REG 253,0 3997713 /lib/ld-2.5.so (path inode=3999293)

bash 4384 test01 mem REG 253,0 3997726 /lib/libdl-2.5.so (path inode=3999299)

bash 4384 test01 DEL REG 253,0 3997775 /lib/libtermcap.so.2.0.8.#prelink#.ngpXBp

bash 4384 test01 mem REG 253,0 25462 1248410 /usr/lib/gconv/gconv-modules.cache

bash 4384 test01 mem REG 253,0 56409760 1151218 /usr/lib/locale/locale-archive

bash 4384 test01 0u CHR 136,5 7 /dev/pts/5

bash 4384 test01 1u CHR 136,5 7 /dev/pts/5

bash 4384 test01 2u CHR 136,5 7 /dev/pts/5

bash 4384 test01 255u CHR 136,5 7 /dev/pts/5