Hi team, Yes. that is the case. I am also confused...
On Saturday, February 12, 2022 at 9:00:29 AM UTC+10 [email protected] wrote: > Hi Ahn, > > Thanks for the stack trace but I'm a bit confused. Is this what you got > while your program was stuck waiting forever? It looks a bit off because > Valgrind complains about "Conditional jump or move depends on uninitialised > value" and callstack appears to show some deadline inside. > > On Thursday, February 10, 2022 at 1:10:12 AM UTC-8 Anh Tran wrote: > >> Hi @google.com,, >> >> Thanks for getting back to me at this. Please see my stack trace from >> valgrind: >> >> ==287419== Memcheck, a memory error detector >> ==287419== Copyright (C) 2002-2017, and GNU GPL'd, by Julian Seward et al. >> ==287419== Using Valgrind-3.18.1 and LibVEX; rerun with -h for copyright >> info >> ==287419== Command: >> /home/atran/codes/workflow_client/dist/workflow/job_client_cli --job-type >> slam >> ==287419== Parent PID: 287418 >> ==287419== >> ==287419== Conditional jump or move depends on uninitialised value(s) >> ==287419== at 0x91743A: void** NextStackFrame<true, false>(void**, >> void const*, unsigned long, unsigned long) (in >> /home/atran/codes/workflow_client/dist/workflow/job_client_cli) >> ==287419== by 0x916F98: int UnwindImpl<false, false>(void**, int*, >> int, int, void const*, int*) (in >> /home/atran/codes/workflow_client/dist/workflow/job_client_cli) >> ==287419== by 0x916D8D: absl::lts_20211102::GetStackTrace(void**, int, >> int) (in /home/atran/codes/workflow_client/dist/workflow/job_client_cli) >> ==287419== by 0x90F27C: absl::lts_20211102::(anonymous >> namespace)::GetStack(void**, int) (in >> /home/atran/codes/workflow_client/dist/workflow/job_client_cli) >> ==287419== by 0x924569: >> absl::lts_20211102::synchronization_internal::GraphCycles::UpdateStackTrace(absl::lts_20211102::synchronization_internal::GraphId, >> >> int, int (*)(void**, int)) (in >> /home/atran/codes/workflow_client/dist/workflow/job_client_cli) >> ==287419== by 0x90F342: >> absl::lts_20211102::DeadlockCheck(absl::lts_20211102::Mutex*) (in >> /home/atran/codes/workflow_client/dist/workflow/job_client_cli) >> ==287419== by 0x90F84C: >> absl::lts_20211102::DebugOnlyDeadlockCheck(absl::lts_20211102::Mutex*) (in >> /home/atran/codes/workflow_client/dist/workflow/job_client_cli) >> ==287419== by 0x90FB6E: absl::lts_20211102::Mutex::Lock() (in >> /home/atran/codes/workflow_client/dist/workflow/job_client_cli) >> ==287419== by 0x8A3AD0: gpr_mu_lock (in >> /home/atran/codes/workflow_client/dist/workflow/job_client_cli) >> ==287419== by 0x7DFA25: begin_worker(grpc_pollset*, >> grpc_pollset_worker*, grpc_pollset_worker**, long) (in >> /home/atran/codes/workflow_client/dist/workflow/job_client_cli) >> ==287419== by 0x7DFFDA: pollset_work(grpc_pollset*, >> grpc_pollset_worker**, long) (in >> /home/atran/codes/workflow_client/dist/workflow/job_client_cli) >> ==287419== by 0x7716F4: pollset_work(grpc_pollset*, >> grpc_pollset_worker**, long) (in >> /home/atran/codes/workflow_client/dist/workflow/job_client_cli) >> ==287419== Uninitialised value was created by a stack allocation >> ==287419== at 0x1C3FD0: >> Emesent::GRPCQueue::Stub::Register(grpc::ClientContext*, Emesent::Empty >> const&, Emesent::RegistrationResponse*) (in >> /home/atran/codes/workflow_client/dist/workflow/job_client_cli) >> ==287419== >> ==287419== Thread 7 grpcpp_sync_ser: >> ==287419== Conditional jump or move depends on uninitialised value(s) >> ==287419== at 0x916F7F: int UnwindImpl<false, false>(void**, int*, >> int, int, void const*, int*) (in >> /home/atran/codes/workflow_client/dist/workflow/job_client_cli) >> ==287419== by 0x916D8D: absl::lts_20211102::GetStackTrace(void**, int, >> int) (in /home/atran/codes/workflow_client/dist/workflow/job_client_cli) >> ==287419== by 0x90F27C: absl::lts_20211102::(anonymous >> namespace)::GetStack(void**, int) (in >> /home/atran/codes/workflow_client/dist/workflow/job_client_cli) >> ==287419== by 0x924569: >> absl::lts_20211102::synchronization_internal::GraphCycles::UpdateStackTrace(absl::lts_20211102::synchronization_internal::GraphId, >> >> int, int (*)(void**, int)) (in >> /home/atran/codes/workflow_client/dist/workflow/job_client_cli) >> ==287419== by 0x90F342: >> absl::lts_20211102::DeadlockCheck(absl::lts_20211102::Mutex*) (in >> /home/atran/codes/workflow_client/dist/workflow/job_client_cli) >> ==287419== by 0x90F84C: >> absl::lts_20211102::DebugOnlyDeadlockCheck(absl::lts_20211102::Mutex*) (in >> /home/atran/codes/workflow_client/dist/workflow/job_client_cli) >> ==287419== by 0x90FB6E: absl::lts_20211102::Mutex::Lock() (in >> /home/atran/codes/workflow_client/dist/workflow/job_client_cli) >> ==287419== by 0x8A3AD0: gpr_mu_lock (in >> /home/atran/codes/workflow_client/dist/workflow/job_client_cli) >> ==287419== by 0x5121A4: grpc_cq_begin_op(grpc_completion_queue*, >> void*) (in /home/atran/codes/workflow_client/dist/workflow/job_client_cli) >> ==287419== by 0x5199C4: >> grpc_core::Server::ShutdownAndNotify(grpc_completion_queue*, void*) (in >> /home/atran/codes/workflow_client/dist/workflow/job_client_cli) >> ==287419== by 0x51CD63: grpc_server_shutdown_and_notify (in >> /home/atran/codes/workflow_client/dist/workflow/job_client_cli) >> ==287419== by 0x231AA2: grpc::Server::ShutdownInternal(gpr_timespec) >> (in /home/atran/codes/workflow_client/dist/workflow/job_client_cli) >> ==287419== Uninitialised value was created by a stack allocation >> ==287419== at 0x1D37E0: std::_Function_handler<void >> (std::__cxx11::basic_string<char, std::char_traits<char>, >> std::allocator<char> > const&, std::__cxx11::basic_string<char, >> std::char_traits<char>, std::allocator<char> > const&), >> workflow_client::GRPCIcomm::start_and_wait()::{lambda(std::__cxx11::basic_string<char, >> >> std::char_traits<char>, std::allocator<char> > const&, >> std::__cxx11::basic_string<char, std::char_traits<char>, >> std::allocator<char> > const&)#1}>::_M_invoke(std::_Any_data const&, >> std::__cxx11::basic_string<char, std::char_traits<char>, >> std::allocator<char> > const&, std::__cxx11::basic_string<char, >> std::char_traits<char>, std::allocator<char> > const&) (in >> /home/atran/codes/workflow_client/dist/workflow/job_client_cli) >> ==287419== >> >> In case this is interesting, this is how I start my server and wait until >> shutdown: >> >> std::string server_addr_and_port = base_address_ + ":" + id_; >> grpc::ServerBuilder server_builder; >> server_builder.AddListeningPort(server_addr_and_port, grpc:: >> InsecureServerCredentials()); >> >> GRPCQueueImpl grpc_queue_service; >> server_builder.RegisterService(&grpc_queue_service); >> server_ = server_builder.BuildAndStart(); >> server_->Wait(); >> On Thursday, February 10, 2022 at 9:08:39 AM UTC+10 [email protected] >> wrote: >> >>> I have also experienced the same issue in my work environment. Our work >>> around was to have N second timeout and check a shutdown flag and then call >>> shutdown. >>> >>> >>> >>> On Feb 9, 2022 at 3:54 PM, <[email protected]' via grpc.io> wrote: >>> >>> Would you capture the call-stack when Shutdown function appears to hang? >>> >>> On Wednesday, February 2, 2022 at 10:24:14 PM UTC-8 Anh Tran wrote: >>> >>>> The last commit on my local copy of gRPC is 06 Jan 2022, so not that >>>> old. >>>> On Thursday, February 3, 2022 at 4:51:16 AM UTC+10 Easwar Swaminathan >>>> wrote: >>>> >>>>> Has anyone of y'all seen this in a more recent version of gRPC. >>>>> `1.30.2` is really old. >>>>> >>>>> On Tuesday, February 1, 2022 at 12:15:54 AM UTC-8 Prasanta Behera >>>>> wrote: >>>>> >>>>>> No, I've not found any solution yet! I was trying to have a >>>>>> hello-world kind of example to reproduce to open a ticket, but as you >>>>>> said >>>>>> with such simple examples it never reproduces... >>>>>> >>>>>> On Tuesday, February 1, 2022 at 1:42:43 PM UTC+5:30 Anh Tran wrote: >>>>>> >>>>>>> I should also add that this behavior happens during threading. >>>>>>> >>>>>>> On Tuesday, February 1, 2022 at 3:45:04 PM UTC+10 Anh Tran wrote: >>>>>>> >>>>>>>> Unfortunately I came across the same problem. >>>>>>>> When trying to isolate the problem (having a simple hello world >>>>>>>> server-client), the problem seems to go away, i.e server can be shut >>>>>>>> down. >>>>>>>> >>>>>>>> But when using in my own project, this happens. And despite my >>>>>>>> effort to track down the problem, I can't seem to spot one. >>>>>>>> This is weird since this version of Shutdown should force shut down >>>>>>>> after a certain period, as describe in the doc. >>>>>>>> >>>>>>>> Prasanta, do you happen to find the solution to your problem? Maybe >>>>>>>> it will give a hint to mine. >>>>>>>> >>>>>>>> On Thursday, January 20, 2022 at 10:02:43 PM UTC+10 Prasanta Behera >>>>>>>> wrote: >>>>>>>> >>>>>>>>> gRPC version : 1.30.2 (c++) >>>>>>>>> $ gcc --version >>>>>>>>> gcc (Ubuntu 5.4.0-6ubuntu1~16.04.12) 5.4.0 20160609 >>>>>>>>> >>>>>>>>> We use gRPC is synchronous mode and stop our gRPC services with >>>>>>>>> this code >>>>>>>>> >>>>>>>>> m_server->Shutdown(std::chrono::system_clock::now() + >>>>>>>>> std::chrono::seconds(1)); >>>>>>>>> m_server->Wait(); >>>>>>>>> >>>>>>>>> On rare occasions (about once in 1000 tries) the Shutdown() call >>>>>>>>> does NOT return and the process just hangs. >>>>>>>>> >>>>>>>>> Is there anything I missing to have a reliable shutdown of the >>>>>>>>> server? >>>>>>>>> >>>>>>>> -- >>> You received this message because you are subscribed to the Google >>> Groups "grpc.io" group. >>> To unsubscribe from this group and stop receiving emails from it, send >>> an email to [email protected]. >>> To view this discussion on the web visit >>> https://groups.google.com/d/msgid/grpc-io/96350454-3e52-4068-b3e1-1fea25537098n%40googlegroups.com >>> >>> <https://groups.google.com/d/msgid/grpc-io/96350454-3e52-4068-b3e1-1fea25537098n%40googlegroups.com?utm_medium=email&utm_source=footer> >>> . >>> >>> -- You received this message because you are subscribed to the Google Groups "grpc.io" group. 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