[GitHub] [incubator-mxnet] apeforest opened a new issue #17470: Distributed training hangs if --sync-dst-dir used and num of hosts less than num of workers

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apeforest opened a new issue #17470: Distributed training hangs if --sync-dst-dir used and num of hosts less than num of workers
URL: https://github.com/apache/incubator-mxnet/issues/17470
 
 
   ## Description
   Distributed training using dist kvstore hangs if --sync-dst-dir used and num of hosts less than num of workers
   
   ### Error Message
   hangs after rsync
   
   ## To Reproduce
   
   ### Steps to reproduce
   (Paste the commands you ran that produced the error.)
   
   1. Follow the example: https://github.com/apache/incubator-mxnet/tree/master/example/distributed_training
   2. Specify hostfile:
   localhost
   
   3. Run:
   python ~/mxnet/tools/launch.py -n 2 -s 2 -H hosts \
       --sync-dst-dir /home/ubuntu/cifar10_dist \
       --launcher ssh \
       "python /home/ubuntu/cifar10_dist/cifar10_dist.py"
   
   ## What have you tried to solve it?
   
   1.
   2.
   
   ## Environment
   
   We recommend using our script for collecting the diagnositc information. Run the following command and paste the outputs below:
   ```
   curl --retry 10 -s https://raw.githubusercontent.com/dmlc/gluon-nlp/master/tools/diagnose.py | python
   
   # paste outputs here
   ```
   

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