Created by: typhoonzero

I used

[Kubernetes分布式训练](../k8s/k8s_distributed_cn.md)

Then travis-ci is building docs using sphinx, then it reported:

Running Sphinx v1.5.6
making output directory...
loading translations [zh_CN]... done
loading pickled environment... not yet created
building [mo]: targets for 0 po files that are out of date
building [html]: targets for 72 source files that are out of date
updating environment: 72 added, 0 changed, 0 removed
/opt/python/2.7.12/lib/python2.7/site-packages/recommonmark/parser.py:280: UserWarning: Unsupported inline type Hardbreak
  warn("Unsupported inline type " + inline.t)
reading sources... [ 72%] howto/usage/cluster/cluster_train_cn                  
Encoding error:
'ascii' codec can't encode characters in position 10-15: ordinal not in range(128)
The full traceback has been saved in /tmp/sphinx-err-Ks_I2T.log, if you want to report the issue to the developers.
make[3]: *** [doc/CMakeFiles/paddle_docs_cn] Error 1
make[2]: *** [doc/CMakeFiles/paddle_docs_cn.dir/all] Error 2
make[1]: *** [doc/CMakeFiles/paddle_docs_cn.dir/rule] Error 2
make: *** [paddle_docs_cn] Error 2
The command "timeout 2580 paddle/scripts/travis/main.sh  # 43min timeout
RESULT=$?; if [ $RESULT -eq 0 ] || [ $RESULT -eq 142 ]; then true; else false; fi;