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Posted to commits@mxnet.apache.org by GitBox <gi...@apache.org> on 2018/11/01 04:00:23 UTC
[GitHub] wshuail opened a new issue #13074: Bug in bipartite_matching
wshuail opened a new issue #13074: Bug in bipartite_matching
URL: https://github.com/apache/incubator-mxnet/issues/13074
Hi when I use SSD for my own dataset, I found a bug in mx.sym.contrib.bipartite_matching for mxnet 1.3.x.
it's easy to reproduce with the code as below. But maybe you have to try many times.
> import mxnet as mx
> from mxnet import nd
>
> for _ in range(10000):
> x = nd.random.uniform(0, 1, (10, 100))
> output = nd.contrib.bipartite_matching(data=x, threshold=1e-12, is_ascend=False)
The error informations change sometimes, but generally it's about the memory.
sometimes, it's memory corruption. Sometimes like the message below.
> *** Error in `python': double free or corruption (out): 0x00007f246400ce40 ***
> ======= Backtrace: =========
> /lib64/libc.so.6(+0x7d053)[0x7f25523dc053]
> /home/xxx/incubator-mxnet/python/mxnet/../../lib/libmxnet.so(_ZN5mxnet2op9SortByKeyIifEEvN7mshadow6TensorINS2_3cpuELi1ET_EENS3_IS4_Li1ET0_EEbPNS3_IS4_Li1EcEEii+0x3
> 62)[0x7f24aaf5f2d2]
> /home/xxx/incubator-mxnet/python/mxnet/../../lib/libmxnet.so(_ZN5mxnet2op24BipartiteMatchingForwardIN7mshadow3cpuEEEvRKN4nnvm9NodeAttrsERKNS_9OpContextERKSt6vector
> INS_5TBlobESaISC_EERKSB_INS_9OpReqTypeESaISH_EESG_+0x129f)[0x7f24aaf63cff]
> /home/xxx/incubator-mxnet/python/mxnet/../../lib/libmxnet.so(_ZZN5mxnet10imperative12PushFComputeERKSt8functionIFvRKN4nnvm9NodeAttrsERKNS_9OpContextERKSt6vectorINS
> _5TBlobESaISA_EERKS9_INS_9OpReqTypeESaISF_EESE_EEPKNS2_2OpES5_RKNS_7ContextERKS9_IPNS_6engine3VarESaISW_EES10_RKS9_INS_8ResourceESaIS11_EERKS9_IPNS_7NDArrayESaIS17_EES1B_RKS
> 9_IjSaIjEESJ_ENKUlNS_10RunContextEE_clES1G_+0x2e8)[0x7f24ab33ac18]
> /home/xxx/incubator-mxnet/python/mxnet/../../lib/libmxnet.so(+0x3b47dc9)[0x7f24ab754dc9]
> /home/xxx/incubator-mxnet/python/mxnet/../../lib/libmxnet.so(_ZN5mxnet6engine14ThreadedEngine15ExecuteOprBlockENS_10RunContextEPNS0_8OprBlockE+0x599)[0x7f24ab7503d
> 9]
> /home/xxx/incubator-mxnet/python/mxnet/../../lib/libmxnet.so(_ZNSt17_Function_handlerIFvSt10shared_ptrIN4dmlc11ManualEventEEEZZN5mxnet6engine23ThreadedEnginePerDev
> ice13PushToExecuteEPNS6_8OprBlockEbENKUlvE_clEvEUlS3_E_E9_M_invokeERKSt9_Any_dataS3_+0xd2)[0x7f24ab760f32]
> /home/xxx/incubator-mxnet/python/mxnet/../../lib/libmxnet.so(_ZNSt6thread5_ImplISt12_Bind_simpleIFSt8functionIFvSt10shared_ptrIN4dmlc11ManualEventEEEES6_EEE6_M_run
> Ev+0x44)[0x7f24ab74fd14]
> /lib64/libstdc++.so.6(+0xb5220)[0x7f253a198220]
> /lib64/libpthread.so.0(+0x7dc5)[0x7f2552e31dc5]
> /lib64/libc.so.6(clone+0x6d)[0x7f2552455ced]
>
This doesn't happen in mxnet 1.1.0, but gluoncv needs mxnet 1.3.0.
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