Access Violation On Application Exit #22479
Description
What version of gRPC and what language are you using?
Grpc version : 1.26.0
Protobuf version : 3.11.2
Language : C++17
What operating system (Linux, Windows,...) and version?
Windows 10 Enterprise
Version 1909
Build 18363.720
What runtime / compiler are you using (e.g. python version or version of gcc)
Visual Studio Professional 16.5.1
MSVC++ Compiler Version 19.25.28611
What did you do?
I'm in the process of messing around with GRPC. Currently I'm using a C# web application as my GRPC server and I'm using a C++ console application as the client.
I was able to successfully connect and communicate with the server with no issue. The problem arises when I exit the C++ console client application. Upon exiting an Access Violation is thrown.
I heavily used the GRPC route_guide_client.cc as a guide to help me write the client application.
I've tried adding calls to both grpc_init( ) and grpc_shutdown( ) even though the client examples don't contain either calls. But adding those had no effect.
What (if anything) am I missing here? Did I forget to call/populate something that the framework is attempting to clean up upon application exit?
I also posted this question to Stack Overflow
GRPC Client
int main( )
{
using namespace MeterReaderWeb::Services;
using namespace google::protobuf::util;
using namespace google::protobuf;
std::cout << "Press enter\n";
std::cin.ignore( );
std::cout << "Calling Grpc service\n";
std::fstream file{ R"(C:\Certificates\certificate.cer)", std::ios::in | std::ios::beg };
if ( !file.is_open( ) )
{
std::cerr << "Failed to open file\n";
return 1;
}
std::stringstream buffer;
buffer << file.rdbuf( );
grpc::SslCredentialsOptions options;
options.pem_root_certs = buffer.str( );
auto credentials{ grpc::SslCredentials( options ) };
auto channel{ grpc::CreateChannel( "localhost:5001", credentials ) };
auto stub{ MeterReadingService::NewStub( channel ) };
ReadingPacket packet;
packet.set_status( ReadingStatus::METER_READER_SUCCESS );
packet.set_notes( "Here are some random notes" );
auto message{ packet.add_readings( ) };
message->set_customer_id( 1 );
message->set_reading_value( 10001 );
auto timestamp{ message->mutable_reading_time( ) };
timestamp->CopyFrom( TimeUtil::GetCurrentTime( ) );
grpc::ClientContext context;
StatusMessage response;
if ( auto status{ stub->AddReading( &context, packet, &response ) }; status.ok( ) )
{
std::cout << "Added reading successfully\n";
auto responseStatus{ response.status( ) };
if ( responseStatus == ReadingStatus::METER_READER_SUCCESS )
{
std::cout << "Server status: success\n"
<< "Message: " << response.message( ) << '\n';
}
}
else
{
std::cerr << "Error: " << status.error_message( ) << '\n';
std::cerr << "Error Details: " << status.error_details( ) << '\n';
}
std::cin.ignore( );
}
What did you expect to see?
The C++ console application to shut down gracefully.
What did you see instead?
An Access Violation
Stack Trace
MeterReaderClientCpp.exe!`anonymous namespace'::ThreadInternalsWindows::thread_body
MeterReaderClientCpp.exe!__acrt_lock
ntdll.dll!RtlpWaitOnCriticalSection()
ntdll.dll!RtlpEnterCriticalSectionContended()
ntdll.dll!RtlEnterCriticalSection()
MeterReaderClientCpp.exe!__acrt_lock(__acrt_lock_id _Lock) Line 55
MeterReaderClientCpp.exe!_free_dbg(void * block, int block_use) Line 1019
MeterReaderClientCpp.exe!free(void * block) Line 32
MeterReaderClientCpp.exe!gpr_free(void * p) Line 53
MeterReaderClientCpp.exe!`anonymous namespace'::ThreadInternalsWindows::destroy_thread() Line 142
MeterReaderClientCpp.exe!`anonymous namespace'::ThreadInternalsWindows::Join() Line 112
MeterReaderClientCpp.exe!grpc_core::Thread::Join() Line 147
MeterReaderClientCpp.exe!gc_completed_threads() Line 74
MeterReaderClientCpp.exe!stop_threads() Line 331
MeterReaderClientCpp.exe!grpc_timer_manager_set_threading(bool threaded) Line 351
MeterReaderClientCpp.exe!grpc_shutdown_internal_locked() Line 175
MeterReaderClientCpp.exe!grpc_shutdown_internal(void * __formal) Line 208
MeterReaderClientCpp.exe!`anonymous namespace'::ThreadInternalsWindows::thread_body(void * v) Line 128