Re: Users cannot access to their imap-folders

[Anton Shilov]

I managed to find who faced to the same problem  https://github.com/cyrusimap/cyrus-imapd/issues/1599 . But the bug still have open status


>Вторник, 11 апреля 2017, 12:18 +07:00 от Anton Shilov via Info-cyrus < info-cyrus at lists.andrew.cmu.edu >:
>
>Users cannot access to their imap-folders.
>Sometimes (once or twice a week) users complains that they cannot connect to their mailboxes and read emails. At the same time I see such records in maillog:
>"Apr 10 15:01:01 mailserv postfix/lmtp[22843]: D64651001D37: to=< user at mailserv.example.com >, orig_to=< user at example.com >, relay=mailserv.example.com[/var/lib/imap/socket/lmtp], delay=300, delays=0.13/0/0/300, dsn=4.4.2, status=deferred (conversation with mailserv.example.com[/var/lib/imap/socket/lmtp] timed out while sending MAIL FROM)».
>It means mail queue increases
>Also I find out lots of "PID-files" in /dev/shm/cyrus-imapd/proc which don't contain info of linked imap-folder. For example: 
>"pc-user.example.com [192.168.0.11] user"
>It's unhealthy situation and I don't understannd what reason is. In order to help users I just kill their IMAP-process and make reconstruct mailbox. Please help me with investigation of the problems.
>My setup is:
>--------------------------------------------
>Static hostname: mailserv
>Icon name: computer-vm
>Chassis: vm
>Machine ID: cbb779ad0b103a10ec75c10c452e0f71
>Boot ID: c31a27599dc84971902e6c70dca26c18
>Virtualization: kvm
>Operating System: CentOS Linux 7 (Core)
>CPE OS Name: cpe:/o:centos:centos:7
>Kernel: Linux 3.10.0-514.6.1.el7.x86_64
>Architecture: x86-64
>--------------------------------------------
>name : Cyrus IMAPD
>version : v2.4.17-Fedora-RPM-2.4.17-8.el7_1 d1df8aff 2012-12-01
>vendor : Project Cyrus
>support-url:  http://www.cyrusimap.org
>os : Linux
>os-version : 3.10.0-514.6.1.el7.x86_64
>environment: Built w/Cyrus SASL 2.1.26
>Running w/Cyrus SASL 2.1.26
>Built w/Berkeley DB 5.3.21: (May 11, 2012)
>Running w/Berkeley DB 5.3.21: (May 11, 2012)
>Built w/OpenSSL 1.0.1e-fips 11 Feb 2013
>Running w/OpenSSL 1.0.1e-fips 11 Feb 2013
>Built w/zlib 1.2.7
>Running w/zlib 1.2.7
>CMU Sieve 2.4
>TCP Wrappers
>NET-SNMP
>mmap = shared
>lock = fcntl
>nonblock = fcntl
>idle = idled
>Server Wide:
>freespace: 1820105352
>------------------------------------
>imapd.conf
>------------------------------------
>debug: no
>commandmintimer: 2
>configdirectory: /var/lib/imap
>partition-default: /var/spool/mail
>proc_path: /dev/shm/cyrus-imapd/proc
>mboxname_lockpath: /dev/shm/cyrus-imapd/mboxname_lock
>duplicate_db_path: /dev/shm/cyrus-imapd/duplicate_db
>statuscache_db_path: /dev/shm/cyrus-imapd/statuscache_db
>allowplaintext: yes
>allowallsubscribe: yes
>allowusermoves: yes
>imapidlepoll: 10
>idlemethod: idled
>imapidresponse: yes
>admins: cyrus
>lmtp_admins: cyrus
>singleinstancestore: yes
>duplicatesuppression: yes
>reject8bit: no
>pass8bit: yes
>munge8bit: no
>lmtp_downcase_rcpt: no
>sieveusehomedir: false
>sievedir: /var/lib/imap/sieve
>duplicate_db: skiplist
>mboxlist_db: skiplist
>postmaster: postmaster
>postuser: shared
>lmtp_over_quota_perm_failure: yes
>lmtp_strict_quota: yes
>quotawarn: 98
>sendmail: /usr/sbin/sendmail
>hashimapspool: 0
>sasl_pwcheck_method: saslauthd
>sasl_mech_list: PLAIN LOGIN
>tls_cert_file: /var/lib/imap/SSL.crt
>tls_key_file: /var/lib/imap/SSL.key
>tls_ca_file: /var/lib/imap/CA_SSL.crt
>tls_ca_path: /var/lib/imap
>tcp_keepalive: yes
>tcp_keepalive_cnt: 3
>tcp_keepalive_intvl: 10
>tcp_keepalive_idle: 180
>temp_path: /tmp
>telemetry_bysessionid: yes
>timeout: 40
>imapidletimeout: 0
>expunge_mode: delayed
>expunge_days: 30
>deletedprefix: DELETED
>delete_mode: immediate
>flushseenstate: 1
>-------------------------------------------
>cyrus.conf
>-------------------------------------------
>START {
>recover<----->cmd="ctl_cyrusdb -r"
>idled><------>cmd="idled"
>}
>SERVICES {
>imap cmd="imapd" listen="imap" proto=tcp4 prefork=5
>imaps cmd="imapd -s" listen="imaps" proto=tcp4 prefork=10
>pop3 cmd="pop3d" listen="pop3" proto=tcp4 prefork=3
>pop3s cmd="pop3d -s" listen="pop3s" proto=tcp4 prefork=3
>sieve cmd="timsieved" listen="sieve" proto=tcp4 prefork=0
>lmtpunix<---->cmd="lmtpd" listen="/var/lib/imap/socket/lmtp" prefork=1
>..
>}
>EVENTS {
>checkpoint<-->cmd="ctl_cyrusdb -c" period=30
>delprune<---->cmd="cyr_expire -E 3" at=0400
>tlsprune<---->cmd="tls_prune" at=0400
>squatter cmd="squatter -i" at=0600
>}
>--------
>Best regards, Anton
>2017-Apr-11
>
>----
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