[Question] The pprof profile is not valid about kratos

[dosubot]

🤖

Based on a similar issue I found in the Kratos repository, you might need to adjust how you're setting up the pprof handler in your Kratos application. Here are two examples of how you can do this:

package main

import (
	"github.com/go-kratos/kratos/v2"
	"github.com/go-kratos/kratos/v2/transport/http"
	"github.com/go-kratos/kratos/v2/transport/http/pprof"
)

func main() {
	server := http.NewServer(
		http.Address("0.0.0.0:8882"),
	)
	server.HandlePrefix("/", pprof.NewHandler())
	kratos.New(kratos.Server(server)).Run()
}

Or this one:

package main

import (
	"github.com/go-kratos/kratos/v2"
	"github.com/go-kratos/kratos/v2/transport/http"
	"github.com/go-kratos/kratos/v2/transport/http/pprof"
)

func main() {
	server := http.NewServer(
		http.Address("0.0.0.0:8882"),
	)
	server.HandlePrefix("/", pprof.NewHandler())
	server.Handle("/debug/pprof/", pprof.NewHandler())
	server.Handle("/debug/pprof/cmdline", pprof.NewHandler())
	server.Handle("/debug/pprof/profile", pprof.NewHandler())
	server.Handle("/debug/pprof/symbol", pprof.NewHandler())
	server.Handle("/debug/pprof/trace", pprof.NewHandler())
	kratos.New(kratos.Server(server)).Run()
}

The server.Handle() is a rewrite method. You can use whichever one you need. You can find more details about this issue here.

Regarding your question about validating the pprof profile, the pprof tool needs some time to collect profiling data. When you access the "/debug/pprof/profile" endpoint, it collects CPU profile for 30 seconds by default. If you try to access the data immediately, it might appear empty because the profiling data has not been collected yet. Try waiting for at least 30 seconds before trying to access the data.

The pprof.NewHandler() function in the Kratos codebase is used to create a new HTTP handler that serves the pprof debugging information. This handler is then used to serve HTTP requests. You can find more details about this function in the Kratos codebase.

I hope this helps! Let me know if you have any other questions.

Sources

• 提供的pprof有问题
• transport/http/pprof/pprof.go

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[dosubot]

🤖

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[shenqidebaozi]

Partial code has been omitted from the provided code. From the provided code, it can be seen that there is no registered pprof interface. Duso has provided relevant prompts, please check if it cannot be obtained due to non registration

[asker-github]

Partial code has been omitted from the provided code. From the provided code, it can be seen that there is no registered pprof interface. Duso has provided relevant prompts, please check if it cannot be obtained due to non registration

Thank you for your reply. I think it was because the processing was too fast and could not be detected.