dovecot - Feb 2009 - About behavior when I used mysql for dict quota backend

Hi List, I of present dovecot 1.1.10 use it, and test dict quota
backend and mysql.
However, I am troubled so that it is IMAP4, and behavior when mysql
fell is different from POP3.
I become the error in Copy of Mail in IMAP4, but do not become the
error in DELE of the POP3.
Therefore I think that contradiction happens in database and real
storage when mysql fell.

I want an error to do it at the time of the DELE command of the POP3
if possible, but how will be it?

Thank you for keeping company at my clumsy English.

----------------------------------------------------
# dovecot -n
---------------------------
# 1.1.10: /etc/dovecot.conf
# OS: Linux 2.6.18-92.1.22.el5xen i686 CentOS release 5.2 (Final)
protocols: imap pop3
login_dir: /var/run/dovecot/login
login_executable(default): /usr/libexec/dovecot/imap-login
login_executable(imap): /usr/libexec/dovecot/imap-login
login_executable(pop3): /usr/libexec/dovecot/pop3-login
mail_max_userip_connections(default): 100
mail_max_userip_connections(imap): 100
mail_max_userip_connections(pop3): 10
last_valid_uid: 65000
mail_location: maildir:~/Maildir
mail_executable(default): /usr/libexec/dovecot/imap
mail_executable(imap): /usr/libexec/dovecot/imap
mail_executable(pop3): /usr/libexec/dovecot/pop3
mail_plugins(default): quota imap_quota
mail_plugins(imap): quota imap_quota
mail_plugins(pop3): quota
mail_plugin_dir(default): /usr/lib/dovecot/imap
mail_plugin_dir(imap): /usr/lib/dovecot/imap
mail_plugin_dir(pop3): /usr/lib/dovecot/pop3
auth default:
  cache_size: 10
  cache_ttl: 300
  passdb:
    driver: pam
  userdb:
    driver: passwd
  socket:
    type: listen
    master:
      path: /var/run/dovecot/auth-master
      mode: 384
      user: dovecot
      group: dovecot
plugin:
  quota: dict:user::proxy::quotadict
  quota_rule: *:storage=1536M
  quota_rule2: Trash:ignore
dict:
  quotadict: mysql:/etc/dovecot/dovecot-dict-quota.conf
---------------------------

mysql status
---------------------------
mysql> SELECT username,current,path FROM quota WHERE
username="test";
+----------+---------+----------------+
| username | current | path           |
+----------+---------+----------------+
| test     |       1 | quota/messages |
| test     |    1460 | quota/storage  |
+----------+---------+----------------+
2 rows in set (0.00 sec)
---------------------------

# /etc/init.d/mysqld stop

Connectting my server (IMAP4) syslog
---------------------------
Feb  3 08:38:40 hideck dovecot: imap-login: Login: user=<test>,
method=PLAIN, rip=192.168.31.72, lip=192.168.0.1
Feb  3 08:38:46 hideck dovecot: dict: mysql: Connect failed to
localhost (dovecot): Can't connect to local MySQL server through
socket '/var/lib/mysql/mysql.sock' (2) - waiting for 75 seconds before
retry
Feb  3 08:38:46 hideck dovecot: dict: dict sql lookup failed: Not
connected to database
Feb  3 08:38:46 hideck dovecot: IMAP(test): Internal quota calculation error
Feb  3 08:38:51 hideck dovecot: IMAP(test): Disconnected: Logged out
bytes=357/1211
---------------------------

Connect Clients Log(IMAP4)
---------------------------
* OK Dovecot ready.
0114 CAPABILITY
* CAPABILITY IMAP4rev1 SASL-IR SORT THREAD=REFERENCES MULTIAPPEND
UNSELECT LITERAL+ IDLE CHILDREN NAMESPACE LOGIN-REFERRALS UIDPLUS
LIST-EXTENDED I18NLEVEL=1 QUOTA AUTH=PLAIN
0114 OK Capability completed.
0115 LOGIN ******** ********
0115 OK Logged in.
0116 NAMESPACE
* NAMESPACE (("" ".")) NIL NIL
0116 OK Namespace completed.
0117 LIST "" "INBOX"
* LIST (\HasNoChildren) "." "INBOX"
0117 OK List completed.
0118 LIST "" *
* LIST (\HasNoChildren) "." "Trash"
* LIST (\HasNoChildren) "." "Sent"
* LIST (\HasNoChildren) "." "Junk"
* LIST (\HasNoChildren) "." "Draft"
* LIST (\HasNoChildren) "." "INBOX"
0118 OK List completed.
0119 STATUS "INBOX" (MESSAGES UNSEEN UIDNEXT)
* STATUS "INBOX" (MESSAGES 1 UIDNEXT 3 UNSEEN 0)
0119 OK Status completed.
0121 SELECT "INBOX"
* FLAGS (\Answered \Flagged \Deleted \Seen \Draft)
* OK [PERMANENTFLAGS (\Answered \Flagged \Deleted \Seen \Draft)] Flags
permitted.
* 1 EXISTS
* 0 RECENT
* OK [UIDVALIDITY 1233565420] UIDs valid
* OK [UIDNEXT 3] Predicted next UID
0121 OK [READ-WRITE] Select completed.
0122 UID SEARCH DELETED
* SEARCH
0122 OK Search completed (0.000 secs).
0123 STATUS "INBOX" (MESSAGES UNSEEN UIDNEXT)
* STATUS "INBOX" (MESSAGES 1 UIDNEXT 3 UNSEEN 0)
0123 OK Status completed.
0124 UID SEARCH NOT DELETED
* SEARCH 2
0124 OK Search completed (0.000 secs).
0125 UID SEARCH UNSEEN
* SEARCH
0125 OK Search completed (0.000 secs).
0126 UID SEARCH ANSWERED
* SEARCH
0126 OK Search completed (0.000 secs).
0127 UID SEARCH FLAGGED
* SEARCH
0127 OK Search completed (0.000 secs).
0128 UID COPY 2 "Trash"
0128 NO Internal error occurred. Refer to server log for more
information. [2009-02-03 08:38:46]
0131 CLOSE
0131 OK Close completed.
0130 LOGOUT
* BYE Logging out
0130 OK Logout completed.
---------------------------

Connectting my server (POP3) syslog
---------------------------
Feb  3 08:43:04 hideck dovecot: pop3-login: Login: user=<test>,
method=PLAIN, rip=192.168.31.72, lip=192.168.0.1
Feb  3 08:43:05 hideck dovecot: dict: mysql: Connect failed to
localhost (dovecot): Can't connect to local MySQL server through
socket '/var/lib/mysql/mysql.sock' (2) - waiting for 75 seconds before
retry
Feb  3 08:43:05 hideck dovecot: dict: sql dict: commit failed: Not
connected to database
Feb  3 08:43:05 hideck dovecot: POP3(test): Disconnected: Logged out
top=0/0, retr=1/1505, del=1/1, size=1488
---------------------------

Connect Clients Log(POP3)
---------------------------
+OK Dovecot ready.
USER test
+OK
PASS ********
+OK Logged in.
STAT
+OK 1 1488
LIST
+OK 1 messages:
1 1488
.
UIDL
+OK
1 000000024986b6ec
.
RETR 1
+OK 1488 octets
DELE 1
+OK Marked to be deleted.
QUIT
+OK Logging out, messages deleted.
---------------------------

# /etc/init.d/mysqld start

No update mysql data
---------------------------
mysql> SELECT username,current,path FROM quota WHERE
username="test";
+----------+---------+----------------+
| username | current | path           |
+----------+---------+----------------+
| test     |       1 | quota/messages |
| test     |    1460 | quota/storage  |
+----------+---------+----------------+
2 rows in set (0.01 sec)
---------------------------

# sudo -u test -H  /usr/sbin/dovecot --exec-mail imap
----------------
# sudo -u test -H  /usr/sbin/dovecot --exec-mail imap
* PREAUTH [CAPABILITY IMAP4rev1 SASL-IR SORT THREAD=REFERENCES
MULTIAPPEND UNSELECT LITERAL+ IDLE CHILDREN NAMESPACE LOGIN-REFERRALS
UIDPLUS LIST-EXTENDED I18NLEVEL=1 QUOTA] Logged in as test
1 GETQUOTAROOT INBOX
* QUOTAROOT "INBOX" "user"
* QUOTA "user" (STORAGE 1 1572864)
1 OK Getquotaroot completed.
2 logout
* BYE Logging out
2 OK Logout completed.
----------------