[I] 自定义重试次数没有生效 (brpc)

[via GitHub]

joke-lee opened a new issue, #2860:
URL: https://github.com/apache/brpc/issues/2860

   ```
   #include <iostream>
   #include <string>
   //#include <braft/protobuf_file.h>
   //#include <braft/raft.h>
   //#include <braft/route_table.h>
   //#include <braft/storage.h>
   //#include <braft/util.h>
   //#include <braft/cli.h>
   //#include <braft/cli.pb.h>
   #include <brpc/channel.h>
   #include <brpc/controller.h>
   #include <brpc/server.h>
   #include <bthread/bthread.h>
   #include <butil/logging.h>
   #include <bvar/bvar.h>
   
   using namespace std;
   
   int main() {
     brpc::ChannelOptions options;
     options.protocol = "http";
     options.max_retry = 100;
     options.connect_timeout_ms = 30;
     options.timeout_ms = 1000;
     string endpoint = "10.0.0.1:8000";
     brpc::Channel channel;
     brpc::Controller cntl;
     cntl.set_max_retry(30);
     if (channel.Init(endpoint.c_str(), "", &options) != 0) {
       return 0;
     }
     cntl.http_request().uri() = endpoint;  // Request URL
     cntl.http_request().set_method(brpc::HTTP_METHOD_GET);
     channel.CallMethod(NULL, &cntl, NULL, NULL, NULL/*done*/);
     if (cntl.Failed()) {
   //cntl.ErrorCode() != brpc::EHTTP
       std::cout << " cntl.max_retry=" << cntl.max_retry()
         << " retry_count=" << cntl.retried_count() << " ErrorText=" << 
cntl.ErrorText() << ", ErrorCode=" << cntl.ErrorCode() << std::endl;
     } else {
       std::cout << "success" << std::endl;
     }
     return 0;
   }
   
   ```
   
   设置一个网络不可达的地址 10.0.0.1:8000
   
   上面设置了重试 30 次，但是实际测试结果只有重试 2 次
   
   ```
   cntl.max_retry=30 retry_count=2 ErrorText=[E110]Fail to connect Socket{id=1 
addr=10.0.0.1:8000} (0x0x1815a00): Connection timed out [R1][E110]Fail to 
connect Socket{id=102 addr=10.0.0.1:8000} (0x0x7f7d7c00bfa0): Connection timed 
out [R2][E101]Fail to connect Socket{id=8589934594 addr=10.0.0.1:8000} 
(0x0x1815c80): Network is unreachable, ErrorCode=101
   
   ```
   
   但是重试设置 1 次
   
   ```
   #include <iostream>
   #include <string>
   //#include <braft/protobuf_file.h>
   //#include <braft/raft.h>
   //#include <braft/route_table.h>
   //#include <braft/storage.h>
   //#include <braft/util.h>
   //#include <braft/cli.h>
   //#include <braft/cli.pb.h>
   #include <brpc/channel.h>
   #include <brpc/controller.h>
   #include <brpc/server.h>
   #include <bthread/bthread.h>
   #include <butil/logging.h>
   #include <bvar/bvar.h>
   
   using namespace std;
   
   int main() {
     brpc::ChannelOptions options;
     options.protocol = "http";
     options.max_retry = 100;
     options.connect_timeout_ms = 1;
     options.timeout_ms = 1000;
     string endpoint = "10.0.0.1:8000";
     brpc::Channel channel;
     brpc::Controller cntl;
     cntl.set_max_retry(1);
     if (channel.Init(endpoint.c_str(), "", &options) != 0) {
       return 0;
     }
     cntl.http_request().uri() = endpoint;  // Request URL
     cntl.http_request().set_method(brpc::HTTP_METHOD_GET);
     channel.CallMethod(NULL, &cntl, NULL, NULL, NULL/*done*/);
     if (cntl.Failed()) {
   //cntl.ErrorCode() != brpc::EHTTP
       std::cout << " cntl.max_retry=" << cntl.max_retry()
         << " retry_count=" << cntl.retried_count() << " ErrorText=" << 
cntl.ErrorText() << ", ErrorCode=" << cntl.ErrorCode() << std::endl;
     } else {
       std::cout << "success" << std::endl;
     }
     return 0;
   }
   
   ```
   
   
   看报错信息是符合预期，只重试了一次
   ```
   /root/CLionProjects/untitled/cmake-build-debug/untitled
    cntl.max_retry=1 retry_count=1 ErrorText=[E110]Fail to connect Socket{id=1 
addr=10.0.0.1:8000} (0x0xb11a00): Connection timed out [R1][E110]Fail to 
connect Socket{id=102 addr=10.0.0.1:8000} (0x0x7f092800c020): Connection timed 
out, ErrorCode=110
   
   Process finished with exit code 0
   
   ```
   
   
   是不是重试次数只能是 0 1 2 才有效果？，即使设置重试的大于 3 次，最多也只能重试 2 次？
   
   
   
   
   


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