[GitHub] lichen11 commented on issue #5296: KVStore error with certain optimizer settings - R-package

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lichen11 commented on issue #5296: KVStore error with certain optimizer settings - R-package
URL: https://github.com/apache/incubator-mxnet/issues/5296#issuecomment-461562885
 
 
   Hi, I am still encountering the problem of training mnist with multiple GPU. 
   
   model <- mx.model.FeedForward.create(lenet, X=train.array, y=train.y,
                                        ctx=list(mx.gpu(0),mx.gpu(1)), num.round=100, array.batch.size=100,
                                        learning.rate=0.05, momentum=0.9, wd=0.00001,
                                        eval.metric=mx.metric.accuracy,
                                        epoch.end.callback=mx.callback.log.train.metric(100), kvstore = "device")
   
   The error I am getting is 
   Start training with 2 devices
   Error in kvstore$set.optimizer(optimizer) : 
     kvstore.cc:124: RCheck failed: names.size() == 2 && names[0] == "create.state" && names[1] == "update" Invalid optimizer
   
   I am using mxnet 1.5.0 obtained from github incubator-mxnet today. 

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