I found the problem, i am hitting a "ulimit -n" limit, since my test is
running on a same machine, it creates n channels for n clients which
corresponds to socket file for each of them.
On Wed, Oct 27, 2021 at 3:49 PM Roshan Chaudhari <rgc...@gmail.com> wrote:
> I am running sync server, and trying with multiple parallel client.
> However, i see crash in the server as I increase number of clients. here is
> a piece of code:
>
> void fn() {
> CreateServer(grpc::InsecureServerCredentials());
> constexpr int kNumClients = 1000;
> constexpr int kNumMsgs = 1000;
>
> std::vector<std::thread> threads;
> auto channel_creds = grpc::InsecureChannelCredentials();
> for (int id = 0; id < kNumClients; id++) {
> threads.emplace_back(([&] {
> auto client = CreateClient(channel_creds);
>
> test::TestRequest request;
> for (int i = 0; i < kNumMsgs; i++) {
> std::string temp;
> temp.resize(6400);
> request.set_data(temp.data(), temp.size());
> if (!client->Write(request)) {
> LOG(ERROR) << "writer returned false, exiting.. ";
> break;
> }
> }
>
> client.reset();
> }));
> }
>
> for (int id = 0; id < kNumClients; id++) {
> threads[id].join();
> }
>
> }
>
> the error i am getting is:
>
> E1027 15:32:51.515823940 28603 ev_epollex_linux.cc:1298]
> pollset_add_fd:
> {"created":"@1635328971.515750825","description":"pollset_transition_pollable_from_fd_to_multi","file":"external/com_github_grpc_grpc/src/core/lib/iomgr/ev_epollex_linux.cc","file_line":317,"referenced_errors":[{"created":"@1635328971.515713815","description":"Too
> many open
> files","errno":24,"file":"external/com_github_grpc_grpc/src/core/lib/iomgr/ev_epollex_linux.cc","file_line":560,"os_error":"Too
> many open files","syscall":"epoll_create1"}]}
> "
>
> what is it I am doing wrong here?
>
>
> -
> Roshan
>
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