logging - 戈朗 : How to capture panic and log this error to original log file?

Question

我试图捕获 panic 并记录错误:

func (s *server) SayHello(ctx context.Context, in *pb.HelloRequest) (*pb.HelloReply, error) {
    defer func() {
        if err := recover(); err != nil {
            glog.Errorf("Recovered from err: %v", err)
        }
    }()
    panic("TISH IS A PANIC")
    return &pb.HelloReply{Message: "Hello " + in.Name}, nil
}

但令我惊讶的是，"Recovered from err: " 从未出现在我的日志文件中，相反，它出现在 /var/log/messages 中。

如何在我的原始日志文件中记录该错误？

[更新]

如果没有 panic ，glog.Errorf 将正确记录到它的日志目录；当出现 panic 时，它就是不能:

// this glog will log correctly, unless uncomment the panic below
glog.Errorf("This is a normal log: %v", err)  
// panic("TISH IS A PANIC")

也许这是不可能的，因为这就是崩溃的意思？

Answer 1

您需要在延迟函数中调用 glog.Flush()。来自 glog 的文档:

Log output is buffered and written periodically using Flush. Programs should call Flush before exiting to guarantee all log output is written.

https://godoc.org/github.com/golang/glog