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[Dovecot] dbox benchmarks
by Timo Sirainen 03 Apr '09

03 Apr '09

http://hg.dovecot.org/dovecot-dbox-redesign/ Looks like multi-dbox scales pretty nicely. Even after 100k messages the peak saved msgs/sec is the same as the initial saved msgs/sec, even if the average slows down somewhat. I tested this by first deleting mailbox, then running "imaptest" for a second to get saving to start writing several fields to dovecot.index.cache file. Then ran imaptest for 60 seconds that did nothing but save messages using IMAP APPEND commands. The summary is that multi-dbox is almost 10x as fast as maildir when fsync is disabled and 2,5 faster with fsyncing: fsync_disable=yes: multi-dbox : ~1700 -> ~1500 msgs/sec, 90842 msgs/60 sec single-dbox: ~1700 -> ~1400 msgs/sec, 86149 msgs/60 sec maildir : ~330 -> ~110 msgs/sec, 9789 msgs/60 sec fsync_disable=no: multi-dbox : ~220 -> ~170 msgs/sec, 10113 msgs/60 sec maildir : ~100 -> ~70 msgs/sec, 4123 msgs/60 sec Also I just noticed that saving messages with two clients gets a peak of 2200 msgs/sec, most likely because two CPU cores can be used then. Hmm. I guess if there were no locking it should have reached 3400 msgs/sec, but it's better than no performance increase. And the raw data: multi-dbox, fsync_disable=yes imaptest clients=1 secs=1;imaptest clients=1 msgs=1000000 - logout=0 append=100,0 secs=60 Logi Sele Appe 100% 100% 100% 1 1 1759 1/ 1 0 0 1424 1/ 1 0 0 1734 1/ 1 ... 0 0 1701 1/ 1 0 0 1640 1/ 1 0 0 778 1/ 1 0 0 1305 1/ 1 0 0 1598 1/ 1 Totals: Logi Sele Appe 100% 100% 100% 1 1 90842 multi-dbox, fsync_disable=no imaptest clients=1 secs=1;imaptest clients=1 msgs=1000000 - logout=0 append=100,0 secs=60 Logi Sele Appe 100% 100% 100% 1 1 209 1/ 1 0 0 227 1/ 1 0 0 208 1/ 1 ... 0 0 203 1/ 1 0 0 145 1/ 1 0 0 156 1/ 1 0 0 180 1/ 1 0 0 162 1/ 1 Totals: Logi Sele Appe 100% 100% 100% 1 1 10113 maildir, fsync_disable=yes Logi Sele Appe 100% 100% 100% 1 1 331 1/ 1 0 0 311 1/ 1 0 0 288 1/ 1 ... 0 0 96 1/ 1 0 0 119 1/ 1 0 0 111 1/ 1 Totals: Logi Sele Appe 100% 100% 100% 1 1 9789 maildir, fsync_disable=no Logi Sele Appe 100% 100% 100% 1 1 77 1/ 1 0 0 101 1/ 1 0 0 45 1/ 1 ... 0 0 52 1/ 1 0 0 67 1/ 1 0 0 89 1/ 1 Totals: Logi Sele Appe 100% 100% 100% 1 1 4123 single-dbox, fsync_disable=yes imaptest clients=1 secs=1;imaptest clients=1 msgs=1000000 - logout=0 append=100,0 secs=60 Logi Sele Appe 100% 100% 100% 1 1 1765 1/ 1 0 0 1715 1/ 1 0 0 1764 1/ 1 ... 0 0 1722 1/ 1 0 0 1679 1/ 1 0 0 1678 1/ 1 0 0 828 1/ 1 0 0 1467 1/ 1 0 0 1469 1/ 1 0 0 1149 1/ 1 0 0 1135 1/ 1 Totals: Logi Sele Appe 100% 100% 100% 1 1 86149

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[Dovecot] An issue of I login my mail server from webmail client
by Alan Zheng 03 Apr '09

03 Apr '09

Dear all: I have a really strange issue, that is when I login my mail server from webmail client (I used SquirrelMail, by the way, I have modified squirrelmail's timeout value, that means not since squirrelmail timeout), I will got timeout issue when I login about 5PM ~ 10PM everyday (it works fine on other time, I also check my cron, that looks no problem), and during this time, I also cannot connect my 993 port with openssl like this: openssl s_client -connect myDomainName:993 But when I use mail client (such as outlook) to access dovecot, that works fine, and during 5PM ~ 10PM, my web site also works fine, and once I restart computer if I can not login during 5PM ~ 10PM from webmail client. that will work fine. can you try to help me? below is my configure of dovecot. *dovecot -n # 1.0.7: /etc/dovecot.conf log_path: /var/run/dovecot/maillog info_log_path: /var/run/dovecot/maillog protocols: imaps ssl_parameters_regenerate: 0 verbose_ssl: yes login_dir: /var/run/dovecot/login login_executable: /usr/libexec/dovecot/imap-login mail_location: maildir:~/Maildir mail_debug: yes auth default: mechanisms: plain login passdb: driver: pam userdb: driver: passwd socket: type: listen client: path: /var/spool/postfix/private/auth mode: 432 user: postfix group: postfix plugin: convert_mail: mbox:~/Mail:INBOX=/var/mail/%u* -- Best Regards Alan Zheng

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[Dovecot] Dovecot ACLs
by dovecot＠corwyn.net 03 Apr '09

03 Apr '09

Running Dovecot 1.1.8 using Virtual users, multiple domains. My file structure is /var/spool/mail/<domain>/<user>/Maildir/ (cur, new,tmp,.Spam) What I'd like to do is add an ACL such that all users can read/delete/move mail that's in the spam folder, but not delete it. Am I going to have to create an entry for every single user, or is there a way to do it once, for all .Spam folders? I've read through http://wiki.dovecot.org/ACL and can't quite get this as the last step. Thanks rick Rick Steeves http://www.sinister.net "The journey is the destination"

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[Dovecot] Dovecot SASL Postfix
by kosovo73＠web.de 03 Apr '09

03 Apr '09

Hello, I try to bring Postfix + Dovecot + SASL in the running. Unfortunately, this has not succeeded to me, only the Pop3 daemon runs without problems. /var/log/dovecot.log dovecot: 2009-04-03 01:04:38 Error: auth(default): bind(/var/spool/postifx/private/auth) failed: No such file or directory dovecot: 2009-04-03 01:04:38 Fatal: auth(default): net_listen_unix(/var/spool/postifx/private/auth) failed: No such file or directory dovecot: 2009-04-03 01:04:38 Fatal: Auth process died too early - shutting down /var/log/mail.log Apr 3 01:08:38 server1 postfix/master[14627]: daemon started -- version 2.5.5, configuration /etc/postfix Apr 3 01:09:07 server1 postfix/smtpd[14650]: warning: SASL: Connect to private/auth failed: No such file or directory Apr 3 01:09:07 server1 postfix/smtpd[14650]: fatal: no SASL authentication mechanisms Apr 3 01:09:08 server1 postfix/master[14627]: warning: process /usr/lib/postfix/smtpd pid 14650 exit status 1 Apr 3 01:09:08 server1 postfix/master[14627]: warning: /usr/lib/postfix/smtpd: bad command startup -- throttling --------------------- postconf -n alias_maps = hash:/etc/aliases broken_sasl_auth_clients = yes config_directory = /etc/postfix content_filter = smtp-amavis:[127.0.0.1]:10024 home_mailbox = maildir/ mailbox_size_limit = 0 mydestination = $myhostname, mail.silvio-siefke.de, server1.silviosiefke.de myhostname = server1.silviosiefke.de recipient_delimiter = + smtp_sasl_auth_enable = no smtpd_recipient_restrictions = reject_non_fqdn_sender reject_non_fqdn_recipient reject_invalid_helo_hostname reject_non_fqdn_helo_hostname permit_sasl_authenticated permit_mynetworks reject_unauth_destination reject_unlisted_recipient reject_rbl_client zen.spamhaus.org reject_rbl_client dul.dnsbl.sorbs.net reject_rbl_client bl.spamcop.net check_policy_service inet:127.0.0.1:10031 reject_unknown_sender_domain smtpd_sasl_auth_enable = yes smtpd_sasl_type = dovecot smtpd_sasl_path = private/auth smtpd_sasl_local_domain = smtpd_sasl_security_options = noanonymous transport_maps = hash:/etc/postfix/transport unknown_local_recipient_reject_code = 550 virtual_alias_maps = mysql:/etc/postfix/mysql/mysql_virtual_alias_maps.cf virtual_gid_maps = static:1001 virtual_mailbox_base = /usr/local/virtual virtual_mailbox_domains = mysql:/etc/postfix/mysql/mysql_virtual_domains_maps.cf virtual_mailbox_limit = 51200000 virtual_mailbox_maps = mysql:/etc/postfix/mysql/mysql_virtual_mailbox_maps.cf virtual_minimum_uid = 1001 virtual_transport = virtual virtual_uid_maps = static:1004 --------------------- /usr/local/etc/dovecot.conf base_dir = /var/run/dovecot/ log_path = /var/log/dovecot.log info_log_path = /var/log/dovecot-info.log log_timestamp = "%b %d %H:%M:%S " ssl_disable = yes auth_verbose=yes auth_debug=yes auth_debug_passwords=yes mail_debug=yes protocols = pop3 imap disable_plaintext_auth = no log_timestamp = "%Y-%m-%d %H:%M:%S " mail_location = maildir:/usr/local/virtual/%d/%n mail_access_groups = virtual first_valid_uid = 1004 first_valid_gid = 1005 protocol imap { } protocol pop3 { pop3_uidl_format = %08Xu%08Xv } auth default { mechanisms = plain login digest-md5 passdb sql { args = /usr/local/etc/dovecot-sql.conf } userdb sql { args = /usr/local/etc/dovecot-sql.conf } user = root socket listen { client { path = /var/spool/postifx/private/auth mode = 0660 user = postfix group = postfix } } } Has someone a Idea? Greetings Silvio

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[Dovecot] Fatal: imap-login: io_loop_handle_add: epoll_ctl(1, 4): Operation not permitted
by Jérôme Blanc 03 Apr '09

03 Apr '09

Hello, I'am following the beginning tutorial on the Wiki, but actually, I can't even start the server correctly so far. The imap-login child dies immediately. What I can guess from the log is that it tries some unpermietted operations on some files but I can't find out which files are concerned. Google is not my friend at all either on this matter. How can I know which files are concerned ? Some infos that might help : [root@Aries ~]# dovecot -n # 1.1.6: /etc/dovecot.conf # OS: Linux 2.6.27.14-server-1mnb i686 Mandriva Linux release 2009.0 (Official) for i586 ext3 ssl_cert_file: /etc/pki/tls/certs/dovecot.pem ssl_key_file: /etc/pki/tls/private/dovecot.pem login_dir: /var/run/dovecot/login login_executable: /usr/lib/dovecot/imap-login mail_privileged_group: mail mail_location: maildir:/var/mail/%n auth default: passdb: driver: passwd-file args: /etc/passwd.dovecot userdb: driver: passwd [root@Aries ~]# ls -ld /var/mail drwxrwx--x 3 root mail 4096 2009-03-10 18:06 /var/mail/ [root@Aries ~]# service dovecot start And here is what I get in the /var/log/syslog file : Mar 10 20:00:47 aries dovecot: Dovecot v1.1.6 starting up Mar 10 20:00:48 aries dovecot: Fatal: imap-login: io_loop_handle_add: epoll_ctl(1, 4): Operation not permitted Mar 10 20:00:48 aries dovecot: Temporary failure in creating login processes, slowing down for now Mar 10 20:00:48 aries dovecot: Fatal: imap-login: io_loop_handle_add: epoll_ctl(1, 4): Operation not permitted Mar 10 20:00:48 aries dovecot: Fatal: imap-login: io_loop_handle_add: epoll_ctl(1, 4): Operation not permitted Thanks -- Jérôme Blanc OpenPGP : 1024D/F44DB96C

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[Dovecot] Squat memory usage
by Ryan 02 Apr '09

02 Apr '09

I've been reading about using Squat with Dovecot on large mailboxes. I was wondering if some of the memory usage during searching and indexing could be reduced by using a berkeley db? I've used this in the past for something similar and in BTREE mode it was very fast for millions of keys. I havent had time to look at how squat is implemented, but I thought I'd throw it out there... -Ryan

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[Dovecot] v1.2.beta2: Fatal: io_loop_handle_add: epoll_ctl(1, 10): Bad file descriptor
by Pascal Volk 02 Apr '09

02 Apr '09

Hi Timo, I'm playing with Dovecot v1.2.beta2 currently. When the dict process was started via deliver(?) and Dovecot is killed (kill $PID_OF_DOVECOT) after delivering only one message, it logs: Fatal: io_loop_handle_add: epoll_ctl(1, 10): Bad file descriptor If the dict process was not started or deliver has delivered more than one message, the error doesn't occur. I'm not using SELinux or AppArmor or something similar. # 1.2.beta2: /usr/local/dovecot12/etc/dovecot.conf # OS: Linux 2.6.26-1-amd64 x86_64 Debian squeeze/sid log_path: /usr/local/dovecot12/var/log/dovecot.log protocols: imap listen: 10.11.12.13:10143 ssl: no disable_plaintext_auth: no login_dir: /usr/local/dovecot12/var/run/dovecot/login login_executable: /usr/local/dovecot12/libexec/dovecot/imap-login verbose_proctitle: yes first_valid_uid: 70000 first_valid_gid: 70000 mail_privileged_group: mail mail_location: maildir:~/Maildir mail_plugins: quota imap_quota auth default: mechanisms: digest-md5 cram-md5 login plain user: nobody verbose: yes debug: yes passdb: driver: sql args: /usr/local/dovecot12/etc/dovecot-sql.conf userdb: driver: sql args: /usr/local/dovecot12/etc/dovecot-sql.conf socket: type: listen master: path: /usr/local/dovecot12/var/run/dovecot/auth-master mode: 384 plugin: quota: dict:user::noenforcing:proxy::quotadict quota_rule: *:storage=10M:messages=11 quota_rule2: Trash:storage=50%% mail_debug: yes dict: quotadict: pgsql:/usr/local/dovecot12/etc/dovecot-dict-quota.conf Regards, Pascal -- The trapper recommends today: cafefeed.0907505(a)localdomain.org

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[Dovecot] quota-fs: get nfs GROUP quota (patch)
by fandorin＠rol.ru 02 Apr '09

02 Apr '09

Hi all. Unfortunately, the existing quota-fs does not know how to get GROUP quota with NFS storage. But there is a tool for Linux quota-tools (http://slackware.rol.ru/slackware/slackware-12.2/source/a/quota/) This patch is made on the basis quota-tools. The patch was successful alpha testing. Suggestions and comments are welcome. diff -ruN dovecot-1.1.11.orig/src/plugins/quota/quota-fs.c dovecot-1.1.11/src/plugins/quota/quota-fs.c --- dovecot-1.1.11.orig/src/plugins/quota/quota-fs.c 2009-01-06 17:33:51.000000000 +0300 +++ dovecot-1.1.11/src/plugins/quota/quota-fs.c 2009-02-11 12:57:55.000000000 +0300 @@ -288,17 +288,26 @@ #ifdef HAVE_RQUOTA /* retrieve user quota from a remote host */ -static int do_rquota(struct fs_quota_root *root, bool bytes, +static int do_rquota(struct fs_quota_root *root, bool group, bool bytes, uint64_t *value_r, uint64_t *limit_r) { - struct getquota_rslt result; - struct getquota_args args; - struct timeval timeout; + struct getquota_rslt *result; + static struct getquota_rslt clnt_res; enum clnt_stat call_status; - CLIENT *cl; + CLIENT *clnt; struct fs_quota_mountpoint *mount = root->mount; const char *host; char *path; + int type, id; + struct timeval timeout = { 2, 0 }; + + union { + getquota_args arg; + ext_getquota_args ext_arg; + } args; + + type = group ? GRPQUOTA : USRQUOTA; + id = group ? root->gid : root->uid; path = strchr(mount->device_path, ':'); if (path == NULL) { @@ -311,82 +320,211 @@ path++; if (getenv("DEBUG") != NULL) { + if (group) { + i_info("quota-fs: host=%s, path=%s, gid=%s", + host, path, dec2str(root->gid)); + } else { i_info("quota-fs: host=%s, path=%s, uid=%s", host, path, dec2str(root->uid)); + } } - /* clnt_create() polls for a while to establish a connection */ - cl = clnt_create(host, RQUOTAPROG, RQUOTAVERS, "udp"); - if (cl == NULL) { - i_error("quota-fs: could not contact RPC service on %s", - host); - return -1; - } - - /* Establish some RPC credentials */ - auth_destroy(cl->cl_auth); - cl->cl_auth = authunix_create_default(); - - /* make the rquota call on the remote host */ - args.gqa_pathp = path; - args.gqa_uid = root->uid; - - timeout.tv_sec = RQUOTA_GETQUOTA_TIMEOUT_SECS; - timeout.tv_usec = 0; - call_status = clnt_call(cl, RQUOTAPROC_GETQUOTA, - (xdrproc_t)xdr_getquota_args, (char *)&args, - (xdrproc_t)xdr_getquota_rslt, (char *)&result, - timeout); + /* + * First try EXT_RQUOTAPROG (Extended (LINUX) RPC quota program) + */ + args.ext_arg.gqa_pathp = path; + args.ext_arg.gqa_id = id; + args.ext_arg.gqa_type = type; - /* the result has been deserialized, let the client go */ - auth_destroy(cl->cl_auth); - clnt_destroy(cl); - - if (call_status != RPC_SUCCESS) { - const char *rpc_error_msg = clnt_sperrno(call_status); - + /* + * Create a RPC client. + */ + + if ((clnt = clnt_create(host, RQUOTAPROG, EXT_RQUOTAVERS, "udp")) != NULL) { + /* + * Initialize unix authentication + */ + clnt->cl_auth = authunix_create_default(); + + /* + * Setup protocol timeout. + */ + clnt_control(clnt, CLSET_TIMEOUT, (caddr_t) & timeout); + + /* + * Do RPC call and check result. + */ + + memset((char *)&clnt_res, 0, sizeof(clnt_res)); + call_status = clnt_call (clnt, RQUOTAPROC_GETQUOTA, + (xdrproc_t) xdr_ext_getquota_args, (caddr_t) &args.ext_arg, + (xdrproc_t) xdr_getquota_rslt, (caddr_t) &clnt_res, + timeout); + result = &clnt_res; + /* + * Destroy unix authentication and RPC client structure. + */ + auth_destroy(clnt->cl_auth); + clnt_destroy(clnt); + + if (call_status != RPC_SUCCESS) { + const char *rpc_error_msg = clnt_sperrno(call_status); i_error("quota-fs: remote rquota call failed: %s", rpc_error_msg); return -1; - } - - switch (result.status) { - case Q_OK: { + } + + switch (result->status) { + case Q_OK: { /* convert the results from blocks to bytes */ - rquota *rq = &result.getquota_rslt_u.gqr_rquota; + rquota *rq = &result->getquota_rslt_u.gqr_rquota; if (rq->rq_active) { - if (bytes) { - *value_r = (uint64_t)rq->rq_curblocks * - (uint64_t)rq->rq_bsize; - *limit_r = (uint64_t)rq->rq_bsoftlimit * - (uint64_t)rq->rq_bsize; - } else { - *value_r = rq->rq_curfiles; - *limit_r = rq->rq_fsoftlimit; - } + if (bytes) { + *value_r = (uint64_t)rq->rq_curblocks * + (uint64_t)rq->rq_bsize; + *limit_r = (uint64_t)rq->rq_bsoftlimit * + (uint64_t)rq->rq_bsize; + } else { + *value_r = rq->rq_curfiles; + *limit_r = rq->rq_fsoftlimit; + } } if (getenv("DEBUG") != NULL) { + if (group) { + i_info("quota-fs: gid=%s, value=%llu, " + "limit=%llu, active=%d", dec2str(root->gid), + (unsigned long long)*value_r, + (unsigned long long)*limit_r, rq->rq_active); + } else { i_info("quota-fs: uid=%s, value=%llu, " "limit=%llu, active=%d", dec2str(root->uid), (unsigned long long)*value_r, (unsigned long long)*limit_r, rq->rq_active); + } } return 1; - } - case Q_NOQUOTA: + } + case Q_NOQUOTA: if (getenv("DEBUG") != NULL) { + if (group) { + i_info("quota-fs: gid=%s, limit=unlimited", + dec2str(root->gid)); + } else { i_info("quota-fs: uid=%s, limit=unlimited", dec2str(root->uid)); + } } return 1; - case Q_EPERM: + case Q_EPERM: i_error("quota-fs: permission denied to rquota service"); return -1; - default: + default: i_error("quota-fs: unrecognized status code (%d) " - "from rquota service", result.status); + "from rquota service", result->status); return -1; + } + } else { + result = NULL; + } + + if (result == NULL || !result->status) { + if (type == USRQUOTA) { + /* + * Try RQUOTAPROG because server doesn't seem to understand EXT_RQUOTAPROG. (NON-LINUX servers.) + */ + args.arg.gqa_pathp = path; + args.arg.gqa_uid = id; + + /* + * Create a RPC client. + */ + if ((clnt = clnt_create(host, RQUOTAPROG, RQUOTAVERS, "udp")) != NULL) { + /* + * Initialize unix authentication + */ + clnt->cl_auth = authunix_create_default(); + + /* + * Setup protocol timeout. + */ + clnt_control(clnt, CLSET_TIMEOUT, (caddr_t) & timeout); + + /* + * Do RPC call and check result. + */ + memset((char *)&clnt_res, 0, sizeof(clnt_res)); + call_status = clnt_call (clnt, RQUOTAPROC_GETQUOTA, + (xdrproc_t) xdr_getquota_args, (caddr_t) &args.arg, + (xdrproc_t) xdr_getquota_rslt, (caddr_t) &clnt_res, + timeout); + result = &clnt_res; + /* + * Destroy unix authentication and RPC client structure. + */ + auth_destroy(clnt->cl_auth); + clnt_destroy(clnt); + + if (call_status != RPC_SUCCESS) { + const char *rpc_error_msg = clnt_sperrno(call_status); + i_error("quota-fs: remote rquota call failed: %s", + rpc_error_msg); + return -1; + } + + switch (result->status) { + case Q_OK: { + /* convert the results from blocks to bytes */ + rquota *rq = &result->getquota_rslt_u.gqr_rquota; + + if (rq->rq_active) { + if (bytes) { + *value_r = (uint64_t)rq->rq_curblocks * + (uint64_t)rq->rq_bsize; + *limit_r = (uint64_t)rq->rq_bsoftlimit * + (uint64_t)rq->rq_bsize; + } else { + *value_r = rq->rq_curfiles; + *limit_r = rq->rq_fsoftlimit; + } + } + if (getenv("DEBUG") != NULL) { + if (group) { + i_info("quota-fs: gid=%s, value=%llu, " + "limit=%llu, active=%d", dec2str(root->gid), + (unsigned long long)*value_r, + (unsigned long long)*limit_r, rq->rq_active); + } else { + i_info("quota-fs: uid=%s, value=%llu, " + "limit=%llu, active=%d", dec2str(root->uid), + (unsigned long long)*value_r, + (unsigned long long)*limit_r, rq->rq_active); + } + } + return 1; + } + case Q_NOQUOTA: + if (getenv("DEBUG") != NULL) { + if (group) { + i_info("quota-fs: gid=%s, limit=unlimited", + dec2str(root->gid)); + } else { + i_info("quota-fs: uid=%s, limit=unlimited", + dec2str(root->uid)); + } + } + return 1; + case Q_EPERM: + i_error("quota-fs: permission denied to rquota service"); + return -1; + default: + i_error("quota-fs: unrecognized status code (%d) " + "from rquota service", result->status); + return -1; + } + + } + } } } #endif @@ -602,6 +740,7 @@ uint64_t limit = 0; bool bytes; int ret; + bool group; *value_r = 0; @@ -614,7 +753,12 @@ #ifdef HAVE_RQUOTA if (strcmp(root->mount->type, "nfs") == 0) { T_BEGIN { - ret = do_rquota(root, bytes, value_r, &limit); + if (root->group_disabled){ + group = FALSE; + } else { + group = TRUE; + } + ret = do_rquota(root, group, bytes, value_r, &limit); } T_END; } else #endif

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[Dovecot] 1.11 bug?: file client-common.c: line 25 (client_unlink): assertion failed: (clients_count > 0)
by Long Le Dinh 02 Apr '09

02 Apr '09

Hi, I got below log in last 2 days, I have to restart dovecot as pop3-login failed and service cannot respond. Mar 26 14:19:31 Info: pop3-login: Disconnected: Shutting down (auth failed, 1 attempts): method=PLAIN, rip=x.x.x.x Mar 26 14:19:31 Info: pop3-login: Disconnected: Shutting down (tried to use disabled plaintext auth): method=??<B7> Mar 26 14:19:31 Panic: pop3-login: file client-common.c: line 25 (client_unlink): assertion failed: (clients_count > 0) Mar 26 14:19:31 Error: child 31902 (login) killed with signal 6 (ip=x.x.x.x) My system info: dovecot -n # 1.1.11: /etc/dovecot.conf # OS: Linux 2.6.18-8.el5 i686 CentOS release 5 (Final) ext3 log_path: /var/log/dovecot.log 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_gid: 100 mail_location: maildir:/home/%u/Maildir mail_executable(default): /usr/libexec/dovecot/imap mail_executable(imap): /usr/libexec/dovecot/imap mail_executable(pop3): /usr/libexec/dovecot/pop3 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: verbose: yes debug: yes passdb: driver: ldap args: /etc/dovecot-ldap.conf userdb: driver: passwd userdb: driver: ldap args: /etc/dovecot-ldap.conf We're using Maildir format, no NFS. Any help/clue is appreciated. Thanks, - Long Le

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[Dovecot] odd epoll() errors
by Ralf Hildebrandt 02 Apr '09

02 Apr '09

>From my log: Dec 29 16:43:58 postamt dovecot: Dovecot v1.1.7 starting up Dec 29 16:43:59 postamt dovecot: Fatal: imap-login: epoll_create(): Too many open files Dec 29 16:43:59 postamt dovecot: Temporary failure in creating login processes, slowing down for now Dec 29 16:43:59 postamt dovecot: Fatal: imap-login: epoll_create(): Too many open files Dec 29 16:43:59 postamt dovecot: Fatal: pop3-login: epoll_create(): Too many open files Dec 29 16:43:59 postamt dovecot: Fatal: imap-login: epoll_create(): Too many open files Dec 29 16:43:59 postamt dovecot: Fatal: imap-login: epoll_create(): Too many open files Dec 29 16:43:59 postamt dovecot: Fatal: pop3-login: epoll_create(): Too many open files Dec 29 16:44:59 postamt dovecot: Fatal: imap-login: epoll_create(): Too many open files Dec 29 16:44:59 postamt dovecot: Fatal: pop3-login: epoll_create(): Too many open files Dec 29 16:44:59 postamt dovecot: Fatal: pop3-login: epoll_create(): Too many open files Dec 29 16:44:59 postamt dovecot: Fatal: imap-login: epoll_create(): Too many open files Dec 29 16:44:59 postamt dovecot: child 15976 (login) returned error 89 (Fatal failure) Dec 29 16:44:59 postamt dovecot: child 15977 (login) returned error 89 (Fatal failure) Dec 29 16:44:59 postamt dovecot: child 15978 (login) returned error 89 (Fatal failure) Dec 29 16:44:59 postamt dovecot: child 15979 (login) returned error 89 (Fatal failure) Dec 29 16:44:59 postamt dovecot: child 15981 (login) returned error 89 (Fatal failure) Dec 29 16:44:59 postamt dovecot: child 15982 (login) returned error 89 (Fatal failure) Dec 29 16:44:59 postamt dovecot: Fatal: imap-login: epoll_create(): Too many open files Dec 29 16:45:59 postamt dovecot: Fatal: pop3-login: epoll_create(): Too many open files Dec 29 16:45:59 postamt dovecot: Fatal: pop3-login: epoll_create(): Too many open files Dec 29 16:45:59 postamt dovecot: child 17052 (login) returned error 89 (Fatal failure) Dec 29 16:45:59 postamt dovecot: child 17053 (login) returned error 89 (Fatal failure) Dec 29 16:45:59 postamt dovecot: child 17054 (login) returned error 89 (Fatal failure) Dec 29 16:45:59 postamt dovecot: child 17055 (login) returned error 89 (Fatal failure) Dec 29 16:45:59 postamt dovecot: child 17056 (login) returned error 89 (Fatal failure) Dec 29 16:45:59 postamt dovecot: child 17057 (login) returned error 89 (Fatal failure) Dec 29 16:45:59 postamt dovecot: Fatal: imap-login: epoll_create(): Too many open files Dec 29 16:46:59 postamt dovecot: Fatal: pop3-login: epoll_create(): Too many open files Dec 29 16:46:59 postamt dovecot: Fatal: pop3-login: epoll_create(): Too many open files Dec 29 16:46:59 postamt dovecot: child 17984 (login) returned error 89 (Fatal failure) Dec 29 16:46:59 postamt dovecot: child 17985 (login) returned error 89 (Fatal failure) Dec 29 16:46:59 postamt dovecot: child 17986 (login) returned error 89 (Fatal failure) Dec 29 16:46:59 postamt dovecot: child 17987 (login) returned error 89 (Fatal failure) Dec 29 16:46:59 postamt dovecot: child 17988 (login) returned error 89 (Fatal failure) Dec 29 16:46:59 postamt dovecot: child 17989 (login) returned error 89 (Fatal failure) Dec 29 16:46:59 postamt dovecot: child 17990 (login) returned error 89 (Fatal failure) Dec 29 16:46:59 postamt dovecot: Fatal: imap-login: epoll_create(): Too many open files Dec 29 16:47:59 postamt dovecot: Fatal: pop3-login: epoll_create(): Too many open files Dec 29 16:47:59 postamt dovecot: Fatal: pop3-login: epoll_create(): Too many open files Dec 29 16:47:59 postamt dovecot: child 18791 (login) returned error 89 (Fatal failure) Dec 29 16:47:59 postamt dovecot: child 18792 (login) returned error 89 (Fatal failure) Dec 29 16:47:59 postamt dovecot: child 18793 (login) returned error 89 (Fatal failure) Dec 29 16:47:59 postamt dovecot: child 18794 (login) returned error 89 (Fatal failure) Dec 29 16:47:59 postamt dovecot: child 18796 (login) returned error 89 (Fatal failure) Dec 29 16:47:59 postamt dovecot: Fatal: imap-login: epoll_create(): Too many open files Dec 29 16:47:59 postamt dovecot: Fatal: imap-login: epoll_create(): Too many open files Dec 29 16:48:59 postamt dovecot: Fatal: pop3-login: epoll_create(): Too many open files Dec 29 16:48:59 postamt dovecot: Fatal: imap-login: epoll_create(): Too many open files Dec 29 16:48:59 postamt dovecot: child 19618 (login) returned error 89 (Fatal failure) Dec 29 16:48:59 postamt dovecot: child 19614 (login) returned error 89 (Fatal failure) Dec 29 16:48:59 postamt dovecot: child 19620 (login) returned error 89 (Fatal failure) Dec 29 16:48:59 postamt dovecot: Fatal: imap-login: epoll_create(): Too many open files Dec 29 16:48:59 postamt dovecot: Fatal: imap-login: epoll_create(): Too many open files Dec 29 16:48:59 postamt dovecot: Fatal: pop3-login: epoll_create(): Too many open files Dec 29 16:48:59 postamt dovecot: Fatal: imap-login: epoll_create(): Too many open files ... Dec 29 20:58:59 postamt dovecot: Fatal: imap-login: epoll_create(): Too many open files Dec 29 20:58:59 postamt dovecot: child 5268 (login) returned error 89 (Fatal failure) Dec 29 20:58:59 postamt dovecot: child 5269 (login) returned error 89 (Fatal failure) Dec 29 20:58:59 postamt dovecot: child 5274 (login) returned error 89 (Fatal failure) Dec 29 20:58:59 postamt dovecot: Fatal: imap-login: epoll_create(): Too many open files -- Ralf Hildebrandt (Ralf.Hildebrandt(a)charite.de) snickebo(a)charite.de Postfix - Einrichtung, Betrieb und Wartung Tel. +49 (0)30-450 570-155 http://www.arschkrebs.de "Java is, in many ways, C++--." - Michael Feldman.

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