Hello,
I have some mailbox with error on index-worker process on dovecot 2.3.0 If I move the same mailbox to dovecot 2.2.33.2 this problem dos not happen. See below the backtrace: May 18 10:33:55 Error: imap(xxxxx)<249924><Xpj77npscpYKAQMQ>: indexer failed to index mailbox INBOX May 18 10:33:55 Fatal: indexer-worker(xxxxx)<281701><Xpj77npscpYKAQMQ:UK9sNELW/lplTAQAF3haWw>: master: service(indexer-worker): child 281701 killed with signal 6 (core dumps disabled) May 18 10:34:55 Panic: indexer-worker(xxxxx)<307016><Xpj77npscpYKAQMQ:oEUqNn7W/lpIrwQAF3haWw>: file unichar.c: line 160 (uni_ucs4_to_utf8_c): assertion failed: (uni_is_valid_ucs4(chr)) May 18 10:34:55 Error: indexer-worker(xxxxxxxx)<307016><Xpj77npscpYKAQMQ:oEUqNn7W/lpIrwQAF3haWw>: Raw backtrace: /usr/lib64/dovecot/libdovecot.so.0(+0xc9804) [0x7f157c8eb804] -> /usr/lib64/dovecot/libdovecot.so.0(+0xc98be) [0x7f157c8eb8be] -> /usr/lib64/dovecot/libdovecot.so.0(i_fatal+0) [0x7f157c85e34b] -> /usr/lib64/dovecot/libdovecot.so.0(uni_ucs4_to_utf8_c+0xc0) [0x7f157c9220b0] -> /usr/lib64/dovecot/libdovecot.so.0(+0xaadc9) [0x7f157c8ccdc9] -> /usr/lib64/dovecot/libdovecot.so.0(mail_html2text_more+0xc5) [0x7f157c8ccf85] -> /usr/lib64/dovecot/lib20_fts_plugin.so(+0xc563) [0x7f157be14563] -> /usr/lib64/dovecot/lib20_fts_plugin.so(fts_parser_more+0x27) [0x7f157be14307] -> /usr/lib64/dovecot/lib20_fts_plugin.so(fts_build_mail+0x440) [0x7f157be121a0] -> /usr/lib64/dovecot/lib20_fts_plugin.so(+0x10266) [0x7f157be18266] -> /usr/lib64/dovecot/libdovecot-storage.so.0(mail_precache+0x2e) [0x7f157cbd56ae] -> dovecot/indexer-worker [roge...@alfacorcorretora.com.br INBOX - 200/734](+0x2794) [0x55bff457f794] -> /usr/lib64/dovecot/libdovecot.so.0(io_loop_call_io+0x65) [0x7f157c902df5] -> /usr/lib64/dovecot/libdovecot.so.0(io_loop_handler_run_internal+0x10f) [0x7f157c90469f] -> /usr/lib64/dovecot/libdovecot.so.0(io_loop_handler_run+0x52) [0x7f157c902ef2] -> /usr/lib64/dovecot/libdovecot.so.0(io_loop_run+0x38) [0x7f157c903118] -> /usr/lib64/dovecot/libdovecot.so.0(master_service_run+0x13) [0x7f157c880ce3] -> dovecot/indexer-worker [roge...@alfacorcorretora.com.br INBOX - 200/734](main+0xdb) [0x55bff457f18b] -> /lib64/libc.so.6(__libc_start_main+0xf5) [0x7f157c480c05] -> dovecot/indexer-worker [roge...@alfacorcorretora.com.br INBOX - 200/734](+0x2252) [0x55bff457f252] May 18 10:34:55 Error: indexer: Indexer worker disconnected, discarding 1 requests for xxxxxx May 18 10:34:55 Error: imap(xxxxx)<249924><Xpj77npscpYKAQMQ>: indexer failed to index mailbox INBOX May 18 10:34:55 Fatal: indexer-worker(xxxxx)<307016><Xpj77npscpYKAQMQ:oEUqNn7W/lpIrwQAF3haWw>: master: service(indexer-worker): child 307016 killed with signal 6 (core dumps disabled) uname -a Linux mailsrv01 2.6.32-696.23.1.el6.x86_64 #1 SMP Tue Mar 13 22:44:18 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux dovecot --version 2.3.0.1 (ffd8a29) dovecot -n # 2.3.0.1 (ffd8a29): /etc/dovecot/dovecot.conf # Pigeonhole version 0.5.devel (61b47828) # OS: Linux 2.6.32-696.23.1.el6.x86_64 x86_64 CentOS release 6.9 (Final) # Hostname: mailsrv01 auth_master_user_separator = * auth_verbose_passwords = sha1 default_client_limit = 2000 deliver_log_format = subject=%s from:%f sender:%e to: %{to_envelope} size:%p msgid=%m status=%$ delivery_time=%{delivery_time} session_time=%{session_time} disable_plaintext_auth = no doveadm_allowed_commands = quota get,dsync-server,kick,purge,fts rescan,altmove,mailbox list,expunge,mailbox status doveadm_password = # hidden, use -P to show it lda_mailbox_autocreate = yes lda_mailbox_autosubscribe = yes lmtp_rcpt_check_quota = yes login_greeting = IMAP4. login_trusted_networks = x.x.x.x/24 mail_fsync = never mail_gid = xxx mail_location = mdbox:~/mdbox:ALT=/altstorage%h/mdbox mail_plugins = quota quota_clone fts fts_solr zlib mail_uid = xxx managesieve_notify_capability = mailto managesieve_sieve_capability = fileinto reject envelope encoded-character vacation subaddress comparator-i;ascii-numeric relational regex imap4flags copy include variables body enotify environment mailbox date ihave duplicate vnd.dovecot .filter namespace inbox { inbox = yes list = yes location = mailbox "Itens Enviados" { auto = subscribe special_use = \Sent } mailbox "Itens ExcluĂdos" { auto = subscribe special_use = \Trash } mailbox Rascunhos { auto = subscribe special_use = \Drafts } mailbox Spam { auto = subscribe special_use = \Junk } prefix = separator = . } passdb { args = /etc/dovecot/dovecot-ldap.conf.ext driver = ldap } plugin { fts = solr fts_solr = url=http://x.x.x.x:8983/solr/dovecot/ imapsieve_mailbox1_before = file:/etc/dovecot/antispam/report-spam.sieve imapsieve_mailbox1_causes = COPY imapsieve_mailbox1_name = Spam imapsieve_mailbox2_before = file:/etc/dovecot/antispam/report-ham.sieve imapsieve_mailbox2_causes = COPY imapsieve_mailbox2_from = Spam imapsieve_mailbox2_name = * last_login_dict = redis:host=x.x.x.x:port=6379 quota = count:User quota quota_clone_dict = redis:host=x.x.x.x:port=6379 quota_rule = *:bytes=0 quota_rule2 = Itens ExcluĂdos:storage=+xM quota_vsizes = yes quota_warning = storage=95%% quota-warning 95 %u quota_warning2 = storage=80%% quota-warning 80 %u sieve = ~/.dovecot.sieve sieve_before = /etc/dovecot/sieve/audit.sieve sieve_before2 = /etc/dovecot/sieve/duplicate.sieve sieve_before3 = /etc/dovecot/sieve/spam.sieve sieve_dir = ~/sieve sieve_global_extensions = +vnd.dovecot.pipe sieve_pipe_bin_dir = /etc/dovecot/antispam sieve_plugins = sieve_imapsieve sieve_extprograms sieve_vacation_default_period = 7d sieve_vacation_max_period = 30d sieve_vacation_min_period = 1h } protocols = imap pop3 lmtp sieve service anvil { client_limit = 2000 } service auth { client_limit = 2000 } service doveadm { inet_listener { port = 9011 } inet_listener http { port = 9010 } vsz_limit = 768 M } service imap-login { process_limit = 800 process_min_avail = 200 service_count = 1 vsz_limit = 512 M } service imap-postlogin { executable = script-login dovecot-postlogin imap unix_listener imap-postlogin { user = mail } user = $default_internal_user } service imap { executable = imap imap-postlogin process_limit = 20000 vsz_limit = 768 M } service indexer-worker { vsz_limit = 512 M } service lmtp { inet_listener lmtp { address = * port = 24 } vsz_limit = 512 M } service managesieve-login { inet_listener sieve { port = 4190 } process_min_avail = 10 } service managesieve { process_limit = 512 } service pop3-postlogin { executable = script-login dovecot-postlogin pop3 unix_listener pop3-postlogin { user = mail } user = $default_internal_user } service pop3 { executable = pop3 pop3-postlogin } service quota-warning { executable = script quota-warning unix_listener quota-warning { user = mail } } service stats { chroot = empty client_limit = 20000 drop_priv_before_exec = no executable = stats extra_groups = group = idle_kill = 4294967295 secs privileged_group = process_limit = 1 process_min_avail = 0 protocol = service_count = 0 type = unix_listener stats-reader { group = mode = 0600 user = } unix_listener stats-writer { group = mode = 0600 user = } user = $default_internal_user vsz_limit = 18446744073709551615 B } ssl = no submission_host = x.x.x.x userdb { driver = prefetch } userdb { args = /etc/dovecot/dovecot-ldap.conf.ext driver = ldap } verbose_proctitle = yes protocol lda { mail_fsync = optimized mail_plugins = quota quota_clone sieve } protocol imap { imap_max_line_length = 128 k mail_max_userip_connections = 30 mail_plugins = quota quota_clone fts fts_solr zlib imap_quota last_login imap_sieve } protocol lmtp { mail_fsync = optimized mail_plugins = quota quota_clone sieve } protocol pop3 { mail_max_userip_connections = 10 mail_plugins = quota quota_clone fts fts_solr zlib last_login pop3_logout_format = in=%i out=%o top=%t/%p, retr=%r/%b, del=%d/%m, size=%s pop3_no_flag_updates = yes pop3_save_uidl = yes pop3_uidl_format = %08Xu%08Xv } Regards, Ricardo