{"action":"opened","issue":{"url":"https://api.github.com/repos/dmlc/mxnet/issues/1971","repository_url":"https://api.github.com/repos/dmlc/mxnet","labels_url":"https://api.github.com/repos/dmlc/mxnet/issues/1971/labels{/name}","comments_url":"https://api.github.com/repos/dmlc/mxnet/issues/1971/comments","events_url":"https://api.github.com/repos/dmlc/mxnet/issues/1971/events","html_url":"https://github.com/dmlc/mxnet/issues/1971","id":151247246,"number":1971,"title":"How to do distributed training ?","user":{"login":"kandycs","id":1282792,"avatar_url":"https://avatars.githubusercontent.com/u/1282792?v=3","gravatar_id":"","url":"https://api.github.com/users/kandycs","html_url":"https://github.com/kandycs","followers_url":"https://api.github.com/users/kandycs/followers","following_url":"https://api.github.com/users/kandycs/following{/other_user}","gists_url":"https://api.github.com/users/kandycs/gists{/gist_id}","starred_url":"https://api.github.com/users/kandycs/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/kandycs/subscriptions","organizations_url":"https://api.github.com/users/kandycs/orgs","repos_url":"https://api.github.com/users/kandycs/repos","events_url":"https://api.github.com/users/kandycs/events{/privacy}","received_events_url":"https://api.github.com/users/kandycs/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":0,"created_at":"2016-04-26T21:47:55Z","updated_at":"2016-04-26T21:47:55Z","closed_at":null,"body":"Hi, I am trying to setup mxnet with 2 nodes. \r\nI have successfully compiled the code with KV_STORE, and USE_HDFS. \r\nBut I met some problem  when running the example code using 2 nodes.\r\n\r\n1. When I try to run the train_mnist.py following the instruction in tutorial, it seems the code hangs there with no progress: \r\n`>>../local/mxnet/tools/launch.py -n2 -H hosts --sync-dst-dir /tmp/mxnet python train_mnist.py --kv-store dist_sync `\r\n` Output:\r\n2016-04-26 17:23:51,776 INFO rsync /home/cchen/train/ -> 143.215.131.65:/tmp/mxnet\r\n2016-04-26 17:23:51,921 INFO rsync /home/cchen/train/ -> 143.215.131.185:/tmp/mxnet\r\n`\r\n\r\n2. How to use HDFS ? \r\nI put the training data under the HDFS file system with the path as /user/cchen/mnist\r\nand tried to access it with `python train_mnist.py --data-dir hfs://mnist`.\r\nmxnet reports `mxnet.base.MXNetError: [16:34:52] src/io/hdfs_filesys.cc:95: Failed to load HDFS-configuration`. So what is the correct way to use HDFS ? \r\n "}}