Bazel构建失败，并在构建语法时执行“执行genrule @six_archive //：copy_six失败”错误

Question

我试图按照syntaxnet's github page上的说明构建syntaxnet分析器模型。

我的系统是Debian Wheezy。与Ubuntu 14.04 LTS或15.05应该没有太大区别。我从源文件中编译了bazel 0.2.2（而不是0.2.2b），它看起来工作正常。

每当我启动bazel test syntaxnet/... util/utf8/...命令，没有测试执行（全部跳过）与一些相当神秘的错误消息。这里有一个例子：

[email protected]:~/tensorflow_syntaxnet/models/syntaxnet# ../../bazel/output/bazel test syntaxnet/... util/utf8/... 
Extracting Bazel installation... 
............. 
INFO: Found 65 targets and 12 test targets... 
ERROR: /root/.cache/bazel/_bazel_root/74c6bab7a21f28ad02405b720243d086/external/six_archive/BUILD:1:1: Executing genrule @six_archive//:copy_six failed: namespace-sandbox failed: error executing command /root/.cache/bazel/_bazel_root/74c6bab7a21f28ad02405b720243d086/syntaxnet/_bin/namespace-sandbox ... (remaining 5 argument(s) skipped). 
unshare failed with EINVAL even after 101 tries, giving up. 
INFO: Elapsed time: 95.469s, Critical Path: 22.46s 
//syntaxnet:arc_standard_transitions_test        NO STATUS 
//syntaxnet:beam_reader_ops_test          NO STATUS 
//syntaxnet:graph_builder_test          NO STATUS 
//syntaxnet:lexicon_builder_test          NO STATUS 
//syntaxnet:parser_features_test          NO STATUS 
//syntaxnet:parser_trainer_test          NO STATUS 
//syntaxnet:reader_ops_test           NO STATUS 
//syntaxnet:sentence_features_test         NO STATUS 
//syntaxnet:shared_store_test           NO STATUS 
//syntaxnet:tagger_transitions_test         NO STATUS 
//syntaxnet:text_formats_test           NO STATUS 
//util/utf8:unicodetext_unittest          NO STATUS 

Executed 0 out of 12 tests: 12 were skipped. 

我使用的是Oracle的Java 8 JDK的建议，我的编译器是：

~/tensorflow_syntaxnet/models/syntaxnet# gcc --version 
gcc (Debian 4.7.2-5) 4.7.2 
Copyright (C) 2012 Free Software Foundation, Inc. 
This is free software; see the source for copying conditions. There is NO 
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 

试图寻找到这是一个在错误消息中提到的namespace-sandbox二进制，但我之前深入探究这一点，我想我会在这里问。

~/tensorflow_syntaxnet/models/syntaxnet# ls -l /root/.cache/bazel/_bazel_root/74c6bab7a21f28ad02405b720243d086/syntaxnet/_bin/namespace-sandbox 
lrwxrwxrwx 1 root root 108 May 13 14:52 /root/.cache/bazel/_bazel_root/74c6bab7a21f28ad02405b720243d086/syntaxnet/_bin/namespace-sandbox -> /root/.cache/bazel/_bazel_root/install/ca381eaad1c931167a6355cb8a2b98cf/_embedded_binaries/namespace-sandbox 
~/tensorflow_syntaxnet/models/syntaxnet# readlink /root/.cache/bazel/_bazel_root/74c6bab7a21f28ad02405b720243d086/syntaxnet/_bin/namespace-sandbox 
/root/.cache/bazel/_bazel_root/install/ca381eaad1c931167a6355cb8a2b98cf/_embedded_binaries/namespace-sandbox 

命令似乎工作正常，但：

~/tensorflow_syntaxnet/models/syntaxnet# file $(readlink /root/.cache/bazel/_bazel_root/74c6bab7a21f28ad02405b720243d086/syntaxnet/_bin/namespace-sandbox) 
/root/.cache/bazel/_bazel_root/install/ca381eaad1c931167a6355cb8a2b98cf/_embedded_binaries/namespace-sandbox: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.26, BuildID[md5/uuid]=0xecfd97b6a6b9a193b045be13654bd55b, not stripped 
~/tensorflow_syntaxnet/models/syntaxnet# /root/.cache/bazel/_bazel_root/install/ca381eaad1c931167a6355cb8a2b98cf/_embedded_binaries/namespace-sandbox 
No command specified. 
Usage: /root/.cache/bazel/_bazel_root/install/ca381eaad1c931167a6355cb8a2b98cf/_embedded_binaries/namespace-sandbox [-S sandbox-root] -- command arg1 
    provided: /root/.cache/bazel/_bazel_root/install/ca381eaad1c931167a6355cb8a2b98cf/_embedded_binaries/namespace-sandbox 
Mandatory arguments: 
    -S <sandbox-root> directory which will become the root of the sandbox 
    -- command to run inside sandbox, followed by arguments 

Optional arguments: 
    -W <working-dir> working directory 
    -T <timeout> timeout after which the child process will be terminated with SIGTERM 
    -t <timeout> in case timeout occurs, how long to wait before killing the child with SIGKILL 
    -d <dir> create an empty directory in the sandbox 
    -M/-m <source/target> system directory to mount inside the sandbox 
    Multiple directories can be specified and each of them will be mounted readonly. 
    The -M option specifies which directory to mount, the -m option specifies where to 
    mount it in the sandbox. 
    -n if set, a new network namespace will be created 
    -r if set, make the uid/gid be root, otherwise use nobody 
    -D if set, debug info will be printed 
    -l <file> redirect stdout to a file 
    -L <file> redirect stderr to a file 
    @FILE read newline-separated arguments from FILE 

任何想法？

更新：我已经做究竟对Ubuntu的LTS 14.04相同的步骤（我的小工作站，而不是运行Debian生产服务器），一切运作良好那里，所有的测试通过。我不知道有什么区别。

Answer 1

设置沙箱时显然会出现一些权限错误。快速解决方法是使用--genrule_strategy=standalone --spawn_strategy=standalone（注意第二个已经在TensorFlow rc文件中指定）停用沙箱。 echo "build --genrule_strategy=standalone --spawn_strategy=standalone" >>~/.bazelrc