2.3.0编译时出现这个问题

[followingdream]

BUILD FAILED
/opt/zs/zstack-utility/zstackbuild/build.xml:282: The following error occurred while executing this line:
/opt/zs/zstack-utility/zstackbuild/projects/zstack-distro.xml:6: The following error occurred while executing this line:
/opt/zs/zstack-utility/zstackbuild/utils.xml:8: exec returned: 2