Created by: zhengzhe97

EnforceNotMet: Failed to find dynamic library: libnccl.so ( libnccl.so: cannot open shared object file: No such file or directory ) 
 Please specify its path correctly using following ways: 
 Method. set environment variable LD_LIBRARY_PATH on Linux or DYLD_LIBRARY_PATH on Mac OS. 
 For instance, issue command: export LD_LIBRARY_PATH=... 
 Note: After Mac OS 10.11, using the DYLD_LIBRARY_PATH is impossible unless System Integrity Protection (SIP) is disabled. at [/paddle/paddle/fluid/platform/dynload/dynamic_loader.cc:157]
PaddlePaddle Call Stacks: 
0       0x7f19fce44e96p paddle::platform::EnforceNotMet::EnforceNotMet(std::__exception_ptr::exception_ptr, char const*, int) + 486
1       0x7f19fe6ea71ep paddle::platform::dynload::GetNCCLDsoHandle() + 1822
2       0x7f19fcf3d0f9p void std::__once_call_impl<std::_Bind_simple<decltype (ncclCommInitAll({parm#1}...)) paddle::platform::dynload::DynLoad__ncclCommInitAll::operator()<ncclComm**, int, int*>(ncclComm**, int, int*)::{lambda()#1} ()> >() + 9
3       0x7f1a6dfc2a80p pthread_once + 80
4       0x7f19fcf40651p paddle::platform::NCCLContextMap::NCCLContextMap(std::vector<boost::variant<paddle::platform::CUDAPlace, paddle::platform::CPUPlace