#0 0x0000000000000000 in ?? ()
#1 0x0000000000461e3b in FileLinePrinter (fd=11, pc=0x3717207faf <ares_set_servers_ports+79>, out=0x2b41a3dfe3b0 "\b", out_size=1024, relocation=236611174400)
at base/stacktrace_utils.cpp:42
#2 0x00002b41a2470485 in google::SymbolizeAndDemangle (pc=0x3717207faf <ares_set_servers_ports+79>, out=0x2b41a3dfe3b0 "\b", out_size=1024) at src/symbolize.cc:611
#3 0x00002b41a2470835 in google::(anonymous namespace)::DumpStackFrameInfo (prefix=0x2b41a24725f6 "PC: ", pc=0x3717207fb0 <ares_set_servers_ports+80>)
at src/signalhandler.cc:220
#4 0x00002b41a2470dbf in google::(anonymous namespace)::FailureSignalHandler (signal_number=11, signal_info=0x2b41a3dfeb70, ucontext=<optimized out>)
at src/signalhandler.cc:300
#5 <signal handler called>
#6 0x0000003717207fb0 in ares_set_servers_ports () from /usr/lib64/libcares.so.2
#7 0x00002b41a297d0cf in grpc_dns_lookup_ares () from /usr/lib64/libgrpc.so.4
#8 0x00002b41a297bd66 in ?? () from /usr/lib64/libgrpc.so.4
#9 0x00002b41a296ca4c in ?? () from /usr/lib64/libgrpc.so.4
#10 0x00002b41a296cd3d in ?? () from /usr/lib64/libgrpc.so.4
#11 0x00002b41a296d091 in ?? () from /usr/lib64/libgrpc.so.4
#12 0x00002b41a29123ec in grpc_combiner_continue_exec_ctx () from /usr/lib64/libgrpc.so.4
#13 0x00002b41a2920f48 in grpc_exec_ctx_flush () from /usr/lib64/libgrpc.so.4
#14 0x00002b41a29358cf in grpc_call_start_batch () from /usr/lib64/libgrpc.so.4
#15 0x00002b41a26b17ec in grpc::Channel::PerformOpsOnCall(grpc::CallOpSetInterface*, grpc::Call*) () from /usr/lib64/libgrpc++.so.1
#16 0x00000000004551eb in grpc::Call::PerformOps (this=0x2b41a405fda8, ops=0x2b41a405fdc8) at /usr/local/include/grpc++/impl/codegen/call.h:655
#17 0x00000000004f1414 in grpc::ClientAsyncResponseReader<helloworld::HelloReply>::ClientAsyncResponseReader<helloworld::HelloRequest> (this=0x2b41a405fd98,
call=..., context=0x2b41a40481e0, request=...) at /usr/local/include/grpc++/impl/codegen/async_unary_call.h:152
#18 0x00000000004f01f3 in grpc::ClientAsyncResponseReader<helloworld::HelloReply>::Create<helloworld::HelloRequest> (channel=0x2b41a4010d00, cq=0x2b41a3dffa88,
method=..., context=0x2b41a40481e0, request=...) at /usr/local/include/grpc++/impl/codegen/async_unary_call.h:102
#19 0x00000000004ec390 in helloworld::Greeter::Stub::AsyncSayHelloRaw (this=0x2b41a400f100, context=0x2b41a40481e0, request=..., cq=0x2b41a3dffa88)
#20 0x0000000000455684 in helloworld::Greeter::Stub::AsyncSayHello (this=0x2b41a400f100, context=0x2b41a40481e0, request=..., cq=0x2b41a3dffa88)
at build64_debug/ads/serving/grpc_lb_demo/helloworld.grpc.pb.h:51
#21 0x000000000045332f in (anonymous namespace)::GreeterClient::SayHello (this=0x2b41a3dffa80, user=...) at ads/serving/grpc_lb_demo/greeter_async_client2.cc:58
#22 0x000000000045373f in (anonymous namespace)::SendRequest (loop=0x2b41a38c3000) at ads/serving/grpc_lb_demo/greeter_async_client2.cc:163
#23 0x000000000045798e in std::_Bind_simple<void (*(ev_loop*))(ev_loop*)>::_M_invoke<0ul>(std::_Index_tuple<0ul>) (this=0x2b41a38c1eb0)
at /usr/local/gcc4.8.2/include/c++/4.8.2/functional:1732
#24 0x000000000045788f in std::_Bind_simple<void (*(ev_loop*))(ev_loop*)>::operator()() (this=0x2b41a38c1eb0) at /usr/local/gcc4.8.2/include/c++/4.8.2/functional:1720
#25 0x0000000000457828 in std::thread::_Impl<std::_Bind_simple<void (*(ev_loop*))(ev_loop*)> >::_M_run() (this=0x2b41a38c1e98)
at /usr/local/gcc4.8.2/include/c++/4.8.2/thread:115
#26 0x0000000000515010 in std::(anonymous namespace)::execute_native_thread_routine (__p=<optimized out>) at ../../../.././libstdc++-v3/src/c++11/thread.cc:84
#27 0x0000003254007aa1 in start_thread () from /lib64/libpthread.so.0
---Type <return> to continue, or q <return> to quit---
#28 0x0000003253ce893d in clone () from /lib64/libc.so.6
在 2017年8月8日星期二 UTC+8下午10:39:42,Mark D. Roth写道: