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Posted to commits@mxnet.apache.org by GitBox <gi...@apache.org> on 2019/07/26 23:32:24 UTC
[GitHub] [incubator-mxnet] Zha0q1 opened a new issue #15670: Custom Operator
Seg Fault
Zha0q1 opened a new issue #15670: Custom Operator Seg Fault
URL: https://github.com/apache/incubator-mxnet/issues/15670
After this PR: https://github.com/apache/incubator-mxnet/pull/15518, custom operators will seg fault in symbolic mode.
I have created a script to reproduce the issue (the profiler is not the issue, I commented out the profiler code and ). If we set `export MXNET_SUBGRAPH_BACKEND=NONE`, then the script will run ok.
I built from source (lattest) and ran the script on Deep Learning Base AMI (Ubuntu) Version 18.0 p2.8xlarge. I used `cmake -DUSE_CUDA=0 -DUSE_MKLDNN=1 -GNinja ..` to build.
Error Message:
```
ubuntu@ip-172-31-38-36:~/abc/incubator-mxnet$ python ../test.py
[23:15:23] ../src/executor/graph_executor.cc:2018: Subgraph backend MKLDNN is activated.
[23:15:23] ../src/executor/graph_executor.cc:2018: Subgraph backend MKLDNN is activated.
Segmentation fault: 11
Stack trace:
[bt] (0) /home/ubuntu/abc/incubator-mxnet/python/mxnet/../../build/libmxnet.so(+0x8e6149) [0x7ffa1d95b149]
[bt] (1) /lib/x86_64-linux-gnu/libc.so.6(+0x354b0) [0x7ffa25ec14b0]
[bt] (2) python() [0x4954ed]
[bt] (3) python() [0x46a16d]
[bt] (4) /usr/lib/python2.7/lib-dynload/_ctypes.x86_64-linux-gnu.so(+0xe719) [0x7ffa251b6719]
[bt] (5) /usr/lib/x86_64-linux-gnu/libffi.so.6(ffi_closure_unix64_inner+0x1bf) [0x7ffa24fa5c2f]
[bt] (6) /usr/lib/x86_64-linux-gnu/libffi.so.6(ffi_closure_unix64+0x46) [0x7ffa24fa5fa8]
[bt] (7) /home/ubuntu/abc/incubator-mxnet/python/mxnet/../../build/libmxnet.so(+0xceb8a2) [0x7ffa1dd608a2]
[bt] (8) /home/ubuntu/abc/incubator-mxnet/python/mxnet/../../build/libmxnet.so(std::_Sp_counted_base<(__gnu_cxx::_Lock_policy)2>::_M_release()+0x46) [0x7ffa1d7d22d6]
```
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