Upgraded to dovecot-2.2.18 yesterday. Clients stopped working. Server log shows: Sep 21 20:37:16 v dovecot: imap(esm): Error: Couldn't load required plugin /usr/lib64/dovecot/lib21_fts_lucene_plugin.so: dlopen() failed: /usr/lib64/dovecot/lib21_fts_lucene_plugin.so: undefined symbol: _ZN6lucene8analysis8snowball16SnowballAnalyzerC1EPFiPKvmP6bufferEPKc Sep 21 20:37:16 v dovecot: imap(esm): Error: Internal error occurred. Refer to server log for more information. Appears to be known problem: http://comments.gmane.org/gmane.mail.imap.dovecot/82357 Possible workaround may be to configure with --with-textcat=no (I haven't tested this). Reproducible: Always Steps to Reproduce: Build dovecot with USE=lucene [and, in case it matters: bzip2 kerberos maildir mbox pam ssl tcpd zlib] Enable in dovecot/conf.d/10-mail.conf : mail_plugins = $mail_plugins fts fts_lucene Enable in dovecot/conf.d/90-plugin.conf: plugin { #setting_name = value fts = lucene fts_lucene = whitespace_chars=@. fts_autoindex = yes } Restart dovecot. Connect from IMAP client. Portage 2.2.20.1 (python 2.7.9-final-0, default/linux/amd64/13.0/desktop, gcc-4.8.5, glibc-2.20-r2, 3.18.12-gentoo x86_64) ================================================================= System uname: Linux-3.18.12-gentoo-x86_64-Intel-R-_Core-TM-2_Duo_CPU_E8500_@_3.16GHz-with-gentoo-2.2 KiB Mem: 8166520 total, 3719612 free KiB Swap: 16787836 total, 14401584 free Timestamp of repository gentoo: Tue, 22 Sep 2015 06:15:01 +0000 sh bash 4.3_p39 ld GNU ld (Gentoo 2.25.1 p1.1) 2.25.1 app-shells/bash: 4.3_p39::gentoo dev-java/java-config: 2.2.0::gentoo dev-lang/perl: 5.20.2::gentoo dev-lang/python: 2.7.9-r1::gentoo, 3.3.5-r1::gentoo, 3.4.1::gentoo dev-util/cmake: 3.2.2::gentoo dev-util/pkgconfig: 0.28-r2::gentoo sys-apps/baselayout: 2.2::gentoo sys-apps/openrc: 0.17::gentoo sys-apps/sandbox: 2.6-r1::gentoo sys-devel/autoconf: 2.13::gentoo, 2.69::gentoo sys-devel/automake: 1.11.6-r1::gentoo, 1.13.4::gentoo, 1.14.1::gentoo, 1.15::gentoo sys-devel/binutils: 2.25.1-r1::gentoo sys-devel/gcc: 4.8.5::gentoo sys-devel/gcc-config: 1.7.3::gentoo sys-devel/libtool: 2.4.6::gentoo sys-devel/make: 4.1-r1::gentoo sys-kernel/linux-headers: 3.18::gentoo (virtual/os-headers) sys-libs/glibc: 2.20-r2::gentoo Repositories: gentoo location: /usr/portage sync-type: rsync sync-uri: rsync://rsync.us.gentoo.org/gentoo-portage priority: -1000 squeezebox location: /var/lib/layman/squeezebox masters: gentoo priority: 0 esm location: /opt/gentoo/portage-overlay masters: gentoo priority: 1 esm-g-cpan location: /opt/gentoo/gcpan-overlay masters: gentoo priority: 2 ACCEPT_KEYWORDS="amd64" ACCEPT_LICENSE="* -@EULA dlj-1.1 skype-eula AdobeFlash-10.1 AdobeFlash-10.3 googleearth Oracle-BCLA-JavaSE AdobeFlash-11.x logitechmediaserver-bin google-chrome" CBUILD="x86_64-pc-linux-gnu" CFLAGS="-march=nocona -O2 -pipe -fforce-addr" CHOST="x86_64-pc-linux-gnu" CONFIG_PROTECT="/etc /usr/lib64/libreoffice/program/sofficerc /usr/share/gnupg/qualified.txt" CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/dconf /etc/env.d /etc/fonts/fonts.conf /etc/gconf /etc/gentoo-release /etc/revdep-rebuild /etc/sandbox.d /etc/splash /etc/terminfo /etc/texmf/language.dat.d /etc/texmf/language.def.d /etc/texmf/updmap.d /etc/texmf/web2c" CXXFLAGS="-march=nocona -O2 -pipe -fforce-addr" DISTDIR="/usr/portage/distfiles" FCFLAGS="-O2 -pipe" FEATURES="assume-digests binpkg-logs config-protect-if-modified distlocks ebuild-locks fixlafiles merge-sync news parallel-fetch preserve-libs protect-owned sandbox sfperms strict unknown-features-warn unmerge-logs unmerge-orphans userfetch userpriv usersandbox usersync" FFLAGS="-O2 -pipe" GENTOO_MIRRORS="http://mirror.datapipe.net/gentoo http://mirror.usu.edu/mirrors/gentoo/ ftp://ftp.ussg.iu.edu/pub/linux/gentoo" LANG="en_US.UTF-8" LDFLAGS="-Wl,-O1 -Wl,--as-needed" MAKEOPTS="-j3" PKGDIR="/usr/portage/packages" PORTAGE_CONFIGROOT="/" PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --omit-dir-times --compress --force --whole-file --delete --stats --human-readable --timeout=180 --exclude=/distfiles --exclude=/local --exclude=/packages" PORTAGE_TMPDIR="/opt/gentoo/tmp" USE="X a52 aac acl acpi alsa amd64 amr bash-completion berkdb bluetooth branding bzip2 cairo cdda cdr cgi cli consolekit cracklib crypt cups cupsddk curl cxx dbus dri dts dv dvd dvdr emacs emboss encode escreen exif fam fbcondecor firefox flac fontconfig fortran gcj gdbm gif glamor gnutls gpm iconv icu jpeg jpeg2k kerberos lcms libnotify mad mbox mbrola mjpeg mmx mmxext mng modules mp3 mp4 mpeg multilib ncurses nls nptl ogg opencore-amr opengl openmp otr pam pango pcre pdf png policykit ppds pulseaudio qt3support qt4 quicktime readline sdl seccomp session skey spell sse sse2 ssl startup-notification subtitles svg tcpd tiff tls truetype udev udisks unicode upower usb vorbis win32codecs wxwidgets x264 xcb xft xml xmp xnest xv xvid zlib" ABI_X86="64" ALSA_CARDS="ali5451 als4000 atiixp atiixp-modem bt87x ca0106 cmipci emu10k1x ens1370 ens1371 es1938 es1968 fm801 hda-intel intel8x0 intel8x0m maestro3 trident usb-audio via82xx via82xx-modem ymfpci" APACHE2_MODULES="actions alias auth_basic authn_core authn_default authn_file authz_core authz_default authz_groupfile authz_host authz_owner authz_user autoindex cache deflate dir disk_cache env expires filter headers imagemap include info log_config mime mime_magic negotiation proxy rewrite setenvif so socache_shmcb speling status unique_id unixd userdir vhost_alias cgi" CALLIGRA_FEATURES="kexi words flow plan sheets stage tables krita karbon braindump author" CAMERAS="ptp2" COLLECTD_PLUGINS="df interface irq load memory rrdtool swap syslog" CPU_FLAGS_X86="mmx mmxext sse sse2 sse3 sse4_1 ssse3" ELIBC="glibc" GPSD_PROTOCOLS="ashtech aivdm earthmate evermore fv18 garmin garmintxt gpsclock itrax mtk3301 nmea ntrip navcom oceanserver oldstyle oncore rtcm104v2 rtcm104v3 sirf superstar2 timing tsip tripmate tnt ublox ubx" INPUT_DEVICES="evdev" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LIBREOFFICE_EXTENSIONS="presenter-console presenter-minimizer" LINGUAS="en en_US" OFFICE_IMPLEMENTATION="libreoffice" PHP_TARGETS="php5-5" PYTHON_SINGLE_TARGET="python2_7" PYTHON_TARGETS="python2_7 python3_4" QEMU_SOFTMMU_TARGETS="i386 x86_64" QEMU_USER_TARGETS="i386 x86_64" RUBY_TARGETS="ruby19 ruby20 ruby21" SANE_BACKENDS="hp" USERLAND="GNU" VIDEO_CARDS="nvidia" XTABLES_ADDONS="quota2 psd pknock lscan length2 ipv4options ipset ipp2p iface geoip fuzzy condition tee tarpit sysrq steal rawnat logmark ipmark dhcpmac delude chaos account" Unset: CC, CPPFLAGS, CTARGET, CXX, EMERGE_DEFAULT_OPTS, INSTALL_MASK, LC_ALL, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS, USE_PYTHON
