Davdi opened a new issue #13526: distributed training van.cc Check failed URL: https://github.com/apache/incubator-mxnet/issues/13526 ## Description i used this shell to test distributed training but it shows this error ../../tools/launch.py -n 2 -H hosts --launcher ssh python image_classification.py --dataset cifar10 --model vgg11 epochs 1 --kvstore dist_sync _init_kvstore_server_module() File "/usr/local/lib/python3.6/dist-packages/mxnet/kvstore_server.py", line 82, in _init_kvstore_server_module server.run() File "/usr/local/lib/python3.6/dist-packages/mxnet/kvstore_server.py", line 73, in run check_call(_LIB.MXKVStoreRunServer(self.handle, _ctrl_proto(self._controller()), None)) File "/usr/local/lib/python3.6/dist-packages/mxnet/base.py", line 252, in check_call raise MXNetError(py_str(_LIB.MXGetLastError())) mxnet.base.MXNetError: [08:18:33] src/van.cc:291: Check failed: (my_node_.port) != (-1) bind failed ## Environment info (Required) unbutu 16.04 1 ps 1 worker(2 gpu) ``` Package used (Python/R/Scala/Julia): (I'm using ...) For Scala user, please provide: 1. Java version: (`java -version`) 2. Maven version: (`mvn -version`) 3. Scala runtime if applicable: (`scala -version`) For R user, please provide R `sessionInfo()`: ## Build info (Required if built from source) Compiler (gcc/clang/mingw/visual studio): MXNet commit hash: (Paste the output of `git rev-parse HEAD` here.) Build config: (Paste the content of config.mk, or the build command.) ## Error Message: (Paste the complete error message, including stack trace.) ## Minimum reproducible example (If you are using your own code, please provide a short script that reproduces the error. Otherwise, please provide link to the existing example.) ## Steps to reproduce (Paste the commands you ran that produced the error.) 1.git clone incubator-mxnet and git clone dmlc-core 2.cd dmlc-core && make 3 cd incubator-mxnet/example/gluon/ ../../tools/launch.py -n 2 -H hosts --launcher ssh python image_classification.py --dataset cifar10 --model vgg11 epochs 1 --kvstore dist_sync
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