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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