emerge ant-core failed

BUILD FAILED
/var/tmp/portage/ant-core-1.7.0/work/apache-ant-1.7.0/build.xml:1002: The following error occurred while executing this line:
/var/tmp/portage/ant-core-1.7.0/work/apache-ant-1.7.0/build.xml:863: Unable to execute command

Total time: 13 seconds
... Failed Building Ant Distribution !
Bootstrap FAILED

!!! ERROR: dev-java/ant-core-1.7.0 failed.
Call stack:
ebuild.sh, line 1545: Called dyn_compile
ebuild.sh, line 940: Called src_compile
ant-core-1.7.0.ebuild, line 60: Called die

!!! build failed
!!! If you need support, post the topmost build error, and the call stack if relevant.

!!! When you file a bug report, please include the following information:
GENTOO_VM=blackdown-jdk-1.4.2 CLASSPATH="" JAVA_HOME="/opt/blackdown-jdk-1.4.2.03"
JAVACFLAGS="-source 1.4 -target 1.4" COMPILER=""
and of course, the output of emerge --info

Portage 2.1.1_pre3-r4 (default-linux/x86/vserver, gcc-3.4.5, glibc-2.3.5-r2, 2.6.17-vs2.1.1-rc31-gentoo i686)
=================================================================
System uname: 2.6.17-vs2.1.1-rc31-gentoo i686 Intel(R) Pentium(R) 4 CPU 3.20GHz
Gentoo Base System version 1.6.14
app-admin/eselect-compiler: [Not Present]
dev-java/java-config: 1.3.7, 2.0.31-r5
dev-lang/python: 2.4.2
dev-python/pycrypto: 2.0.1-r5
dev-util/ccache: [Not Present]
dev-util/confcache: [Not Present]
sys-apps/sandbox: 1.2.12
sys-devel/autoconf: 2.13, 2.61
sys-devel/automake: 1.4_p6, 1.5, 1.6.3, 1.7.9-r1, 1.8.5-r3, 1.9.6-r1, 1.10
sys-devel/binutils: 2.16.1
sys-devel/gcc-config: 1.3.13-r1
sys-devel/libtool: 1.5.22
virtual/os-headers: 2.6.11-r2
ACCEPT_KEYWORDS="x86"
AUTOCLEAN="yes"
CBUILD="i686-pc-linux-gnu"
CFLAGS="-O3 -pipe -march=pentium4"
CHOST="i686-pc-linux-gnu"
CONFIG_PROTECT="/etc"
CONFIG_PROTECT_MASK="/etc/env.d /etc/env.d/java/ /etc/gconf /etc/java-config/vms/ /etc/terminfo"
CXXFLAGS="-O3 -pipe -march=pentium4"
DISTDIR="/usr/portage/distfiles"
FEATURES="distlocks metadata-transfer sandbox sfperms strict"
GENTOO_MIRRORS="rsync://mirror.aiya.ru/gentoo http://mirror.aiya.ru/pub/gentoo"
MAKEOPTS="-j2"

java-check-environment