retry feature for jsk_data.download_data.py

[k-okada]

sometime download_data.py fails for some reason, can we add retry parameter? like https://github.com/ros/ros/blob/lunar-devel/core/rosbuild/core/rosbuild/bin/download_checkmd5.py#L77 ?

https://s3.amazonaws.com/archive.travis-ci.org/jobs/304331569/log.txt?X-Amz-Expires=30&X-Amz-Date=20171121T053939Z&X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=AKIAJRYRXRSVGNKPKO5A/20171121/us-east-1/s3/aws4_request&X-Amz-SignedHeaders=host&X-Amz-Signature=7300fae9676861b336e7b85437c1db8d6d36fc838c14fc407f675e31645d70e3

/usr/local/lib/python2.7/dist-packages/urllib3/util/ssl_.py:137: InsecurePlatformWarning: A true SSLContext object is not available. This prevents urllib3 from configuring SSL appropriately and may cause certain SSL connections to fail. You can upgrade to a newer version of Python to solve this. For more information, see https://urllib3.readthedocs.io/en/latest/advanced-usage.html#ssl-warnings


  InsecurePlatformWarning


Process Process-2:


Traceback (most recent call last):


  File "/usr/lib/python2.7/multiprocessing/process.py", line 258, in _bootstrap


    self.run()


  File "/usr/lib/python2.7/multiprocessing/process.py", line 114, in run


    self._target(*self._args, **self._kwargs)


  File "/opt/ros/indigo/lib/python2.7/dist-packages/jsk_data/download_data.py", line 127, in download_data


    download(download_client, url, cache_file, quiet=quiet, chmod=chmod)


  File "/opt/ros/indigo/lib/python2.7/dist-packages/jsk_data/download_data.py", line 62, in download


    os.chmod(output, 0766)


OSError: [Errno 2] No such file or directory: '/workspace/.ros/data/jsk_pcl_ros/2017-06-19-19-34-18_tabletop_coffeecup.tgz'


ERROR bag unindexed: /workspace/ros/ws_jsk_recognition/src/jsk_recognition/jsk_pcl_ros/sample/data/2016-07-06-12-16-43-person-in-point-cloud/vision.compressed.bag.  Run rosbag reindex.


cd /workspace/ros/ws_jsk_recognition/build/jsk_pcl_ros; catkin build --get-env jsk_pcl_ros | catkin env -si  /usr/bin/make --jobserver-fds=6,7 -j; cd -

[wkentaro]

Sorry for late. Is this still a problem? @k-okada
Do you have any opinion? @furushchev