It seems that most of the JAR files installed by the dev-java/ant-optional-1.6.1-r1 ebuild are virtually empty: $ ls -l /usr/share/ant-optional/lib/ | sort +4 total 716 -rw-r--r-- 1 root root 354 May 17 12:41 ant-apache-bsf.jar -rw-r--r-- 1 root root 354 May 17 12:41 ant-apache-resolver.jar -rw-r--r-- 1 root root 354 May 17 12:41 ant-commons-net.jar -rw-r--r-- 1 root root 354 May 17 12:41 ant-icontract.jar -rw-r--r-- 1 root root 354 May 17 12:41 ant-jai.jar -rw-r--r-- 1 root root 354 May 17 12:41 ant-javamail.jar -rw-r--r-- 1 root root 354 May 17 12:41 ant-netrexx.jar -rw-r--r-- 1 root root 354 May 17 12:41 ant-starteam.jar -rw-r--r-- 1 root root 354 May 17 12:41 ant-stylebook.jar -rw-r--r-- 1 root root 354 May 17 12:41 ant-vaj.jar -rw-r--r-- 1 root root 354 May 17 12:41 ant-weblogic.jar -rw-r--r-- 1 root root 354 May 17 12:41 ant-xalan1.jar -rw-r--r-- 1 root root 354 May 17 12:41 ant-xslp.jar -rw-r--r-- 1 root root 2485 May 17 12:41 ant-xalan2.jar -rw-r--r-- 1 root root 3027 May 17 12:41 ant-jakarta-log4j.jar -rw-r--r-- 1 root root 3713 May 17 12:41 ant-jakarta-regexp.jar -rw-r--r-- 1 root root 3855 May 17 12:41 ant-commons-logging.jar -rw-r--r-- 1 root root 5678 May 17 12:41 ant-antlr.jar -rw-r--r-- 1 root root 6609 May 17 12:41 ant-jmf.jar -rw-r--r-- 1 root root 6832 May 17 12:41 ant-swing.jar -rw-r--r-- 1 root root 7985 May 17 12:41 ant-jdepend.jar -rw-r--r-- 1 root root 8569 May 17 12:41 ant-jakarta-bcel.jar -rw-r--r-- 1 root root 21352 May 17 12:41 ant-jsch.jar -rw-r--r-- 1 root root 48152 May 17 12:41 ant-jakarta-oro.jar -rw-r--r-- 1 root root 65974 May 17 12:41 ant-junit.jar -rw-r--r-- 1 root root 66894 May 17 12:41 ant-trax.jar -rw-r--r-- 1 root root 405459 May 17 12:41 ant-nodeps.jar $ unzip -t /usr/share/ant-optional/lib/ant-apache-bsf.jar Archive: /usr/share/ant-optional/lib/ant-apache-bsf.jar testing: META-INF/MANIFEST.MF OK No errors detected in compressed data of /usr/share/ant-optional/lib/ant-apache-bsf.jar. $ unzip -t /usr/share/ant-optional/lib/ant-commons-net.jar Archive: /usr/share/ant-optional/lib/ant-commons-net.jar testing: META-INF/MANIFEST.MF OK No errors detected in compressed data of /usr/share/ant-optional/lib/ant-commons-net.jar. This is not correct. The 'ant-commons-net.jar' file, for example, should contain the file org/apache/tools/ant/taskdefs/optional/net/FTP.class. Reproducible: Always Steps to Reproduce: 1. Install dev-java/ant-optional-1.6.1-r1 2. unzip -t /usr/share/ant-optional/lib/ant-commons-net.jar | grep FTP Actual Results: No output. Expected Results: Output: org/apache/tools/ant/taskdefs/optional/net/FTP.class # emerge info Portage 2.0.50-r8 (default-x86-2004.0, gcc-3.3.3, glibc-2.3.3.20040420-r0, 2.6.5-gentoo-r1) ================================================================= System uname: 2.6.5-gentoo-r1 i686 Pentium III (Coppermine) Gentoo Base System version 1.4.16 Autoconf: sys-devel/autoconf-2.59-r3 Automake: sys-devel/automake-1.8.3 ACCEPT_KEYWORDS="x86" AUTOCLEAN="yes" CFLAGS="-O2 -march=pentium3 -fomit-frame-pointer" CHOST="i686-pc-linux-gnu" COMPILER="gcc3" CONFIG_PROTECT="/etc /usr/X11R6/lib/X11/xkb /usr/kde/2/share/config /usr/kde/3.2/share/config /usr/kde/3/share/config /usr/lib/mozilla/defaults/pref /usr/share/config /var/qmail/control" CONFIG_PROTECT_MASK="/etc/gconf /etc/terminfo /etc/env.d" CXXFLAGS="-O2 -march=pentium3 -fomit-frame-pointer" DISTDIR="/usr/portage/distfiles" FEATURES="autoaddcvs ccache sandbox" GENTOO_MIRRORS="ftp://mirrors.sec.informatik.tu-darmstadt.de/gentoo/ http://gentoo.tiscali.nl/gentoo/ http://linux.rz.ruhr-uni-bochum.de/download/gentoo-mirror/ http://ftp.gentoo.skynet.be/pub/gentoo/" MAKEOPTS="-j2" PKGDIR="/usr/portage/packages" PORTAGE_TMPDIR="/var/tmp" PORTDIR="/usr/portage" PORTDIR_OVERLAY="" SYNC="rsync://rsync.gentoo.org/gentoo-portage" USE="X alsa apm arts avi berkdb crypt cups directfb encode foomaticdb gdbm gif gimpprint gpm gtk2 imlib java jikes jpeg kde libg++ libwww mad mikmod mmx motif mozilla mpeg ncurses nls oggvorbis opengl oss pam pdflib perl png ppds qt quicktime readline sdl slang spell ssl svga tcpd truetype x86 xinerama xml2 xmms xv zlib"
this happens when you don't have the packages isntalled ant-optional depends on are you sure you have commons-net etc installed? some of them should be empty, like ant-javamail (useless you enabled javamail useflag) if you have still having this issue please reopen with more info
