[GitHub] lanking520 commented on issue #13258: Java Benchmark failure

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

lanking520 commented on issue #13258: Java Benchmark failure
URL: https://github.com/apache/incubator-mxnet/pull/13258#issuecomment-438519993
 
 
   How to test:
   ```
   bash run_java_inference_bm.sh --model-name ObjectDetection --num-runs 5 --model-path-prefix ../infer/models/resnet50_ssd/resnet50_ssd_model --input-image ../infer/images/dog.jpg --batchsize 5
   ```
   Why does this problem appear?
   
   If you try to bind same cpu() twice, some error can be triggered on the backend.
   ```
   Exception in thread "main" java.lang.IllegalArgumentException: requirement failed: Too many slices such that some splits are empty
   	at scala.Predef$.require(Predef.scala:224)
   	at org.apache.mxnet.ExecutorManager$$anonfun$splitInputSlice$1.apply$mcVI$sp(ExecutorManager.scala:201)
   	at org.apache.mxnet.ExecutorManager$$anonfun$splitInputSlice$1.apply(ExecutorManager.scala:198)
   	at org.apache.mxnet.ExecutorManager$$anonfun$splitInputSlice$1.apply(ExecutorManager.scala:198)
   	at scala.collection.IndexedSeqOptimized$class.foreach(IndexedSeqOptimized.scala:33)
   	at scala.collection.mutable.ArrayOps$ofInt.foreach(ArrayOps.scala:234)
   	at org.apache.mxnet.ExecutorManager$.splitInputSlice(ExecutorManager.scala:198)
   	at org.apache.mxnet.module.DataParallelExecutorGroup$$anonfun$decideSlices$3.apply(DataParallelExecutorGroup.scala:348)
   	at org.apache.mxnet.module.DataParallelExecutorGroup$$anonfun$decideSlices$3.apply(DataParallelExecutorGroup.scala:338)
   	at scala.collection.TraversableLike$WithFilter$$anonfun$foreach$1.apply(TraversableLike.scala:733)
   	at scala.collection.Iterator$class.foreach(Iterator.scala:893)
   	at scala.collection.AbstractIterator.foreach(Iterator.scala:1336)
   	at scala.collection.IterableLike$class.foreach(IterableLike.scala:72)
   	at scala.collection.AbstractIterable.foreach(Iterable.scala:54)
   	at scala.collection.TraversableLike$WithFilter.foreach(TraversableLike.scala:732)
   	at org.apache.mxnet.module.DataParallelExecutorGroup.decideSlices(DataParallelExecutorGroup.scala:338)
   	at org.apache.mxnet.module.DataParallelExecutorGroup.<init>(DataParallelExecutorGroup.scala:312)
   	at org.apache.mxnet.module.DataParallelExecutorGroup$Builder.build(DataParallelExecutorGroup.scala:226)
   	at org.apache.mxnet.module.Module.bind(Module.scala:288)
   	at org.apache.mxnet.infer.Predictor$$anonfun$loadModule$1.apply$mcV$sp(Predictor.scala:210)
   	at org.apache.mxnet.infer.Predictor$$anonfun$loadModule$1.apply(Predictor.scala:210)
   	at org.apache.mxnet.infer.Predictor$$anonfun$loadModule$1.apply(Predictor.scala:210)
   	at org.apache.mxnet.infer.MXNetThreadPoolHandler$$anon$4.call(MXNetHandler.scala:73)
   	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
   	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
   	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
   	at java.lang.Thread.run(Thread.java:748)
   ```

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