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Posted to issues@mxnet.apache.org by GitBox <gi...@apache.org> on 2020/09/08 12:21:02 UTC
[GitHub] [incubator-mxnet] r3stl355 opened a new issue #19101: [v1.x] [MAC] test_operator.test_index_copy causes `bus error`, possible segfault
r3stl355 opened a new issue #19101:
URL: https://github.com/apache/incubator-mxnet/issues/19101
## Description
This only happens on my Mac on v1.x. The same test on v2.0 runs and passes. I can also see that the same test succeeds on `centos-cpu` CI.
Other posts for this type error i found online suggest possible segfault as an underlying problem.
## To reproduce
`nosetests tests/python/unittest/test_operator.py:test_index_copy`
## Environment
OS: Catalina: 10.15.6
`clang --version`:
Apple clang version 12.0.0 (clang-1200.0.31.1)
Target: x86_64-apple-darwin19.6.0
Thread model: posix
## What have you tried to solve it?
Commenting out https://github.com/apache/incubator-mxnet/blob/8dbed966e35b979d8f770b0d5b0ec9f707b3a2f1/tests/python/unittest/test_operator.py#L5709 prevents the error but test fails 2 lines later when comparing gradents. The same is for line 5717 and subsequent assertions
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[GitHub] [incubator-mxnet] r3stl355 closed issue #19101: [v1.x] [MAC] test_operator.test_index_copy causes `bus error`, possible segfault
Posted by GitBox <gi...@apache.org>.
r3stl355 closed issue #19101:
URL: https://github.com/apache/incubator-mxnet/issues/19101
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[GitHub] [incubator-mxnet] szha commented on issue #19101: [v1.x] [MAC] test_operator.test_index_copy causes `bus error`, possible segfault
Posted by GitBox <gi...@apache.org>.
szha commented on issue #19101:
URL: https://github.com/apache/incubator-mxnet/issues/19101#issuecomment-689086027
@r3stl355 it forces the execution to be synchronous, and if it resolves the issue it means there's a race condition that needs to be resolved.
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[GitHub] [incubator-mxnet] r3stl355 commented on issue #19101: [v1.x] [MAC] test_operator.test_index_copy causes `bus error`, possible segfault
Posted by GitBox <gi...@apache.org>.
r3stl355 commented on issue #19101:
URL: https://github.com/apache/incubator-mxnet/issues/19101#issuecomment-689043155
Thank you @szha , `MXNET_ENGINE_TYPE=NaiveEngine` did the trick, no more errors, I'm now going to read-up to understand what it does
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[GitHub] [incubator-mxnet] github-actions[bot] commented on issue #19101: [v1.x] [MAC] test_operator.test_index_copy causes `bus error`, possible segfault
Posted by GitBox <gi...@apache.org>.
github-actions[bot] commented on issue #19101:
URL: https://github.com/apache/incubator-mxnet/issues/19101#issuecomment-688830553
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[GitHub] [incubator-mxnet] szha commented on issue #19101: [v1.x] [MAC] test_operator.test_index_copy causes `bus error`, possible segfault
Posted by GitBox <gi...@apache.org>.
szha commented on issue #19101:
URL: https://github.com/apache/incubator-mxnet/issues/19101#issuecomment-688996937
@r3stl355 thanks for reporting the issue. Could you set environment variables `DMLC_LOG_STACK_TRACE_DEPTH=150 MXNET_ENGINE_TYPE=NaiveEngine` and run the same program again and share the stacktrace?
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