[GitHub] solin319 opened a new pull request #12350: fix bug in 'device' type kvstore

[GitBox <gi...@apache.org>]

solin319 opened a new pull request #12350: fix bug in 'device' type kvstore
URL: https://github.com/apache/incubator-mxnet/pull/12350
 
 
   When we init a key after another key pushed. This key has no merged_buf_ in file 'comm.h', but the inited_ is true. So it can't pull this new key. The code below will make error.
   ```
   import mxnet as mx
   a=mx.nd.array([1,2,3], ctx=mx.gpu(0))
   b=mx.nd.array([0,0,0], ctx=mx.gpu(0))
   kv=mx.kv.create('device')
   kv.init('1', a)
   kv.push('1', [a,a,a,a])
   kv.pull('1', b)
   kv.init('2', a)
   kv.pull('2', b)
   ```
   

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