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[Spring Boot] Sentry default settings

by 민갤

Back End / Dec 14 2023

Sentry

It is a software monitoring tool that helps you track, collect, and analyze errors that occur in your application.

Create project

Select the platform on which you want to set up Sentry, and specify the project name and team.

Once a project is created, it will kindly inform you how to set up Sentry on the selected platform.

In this article, set up Sentry in a way that the document(link) tells you.

Screen at initial creation

Select Spring Boot. Scroll down to set the project name.

How to set up Spring Boot

Check Data Source Name (DSN)

URL used to forward error information from the client to Sentry.

Check the DSN value on the screen that appeared when the project was created, or check the DSN value in the project settings to copy it.

Settings > Projects > 해당 Project > Client Keys (DSN)

DSN Copy

Dependency

This article uses Spring Boot 3 and Kotlin.

build.gradle.kts

dependencies {
    implementation("io.sentry:sentry-spring-boot-starter-jakarta:7.0.0")
}

Configure

application.yml

sentry:
    dsn: "${SENTRY_DSN:sentry-dsn}"
    traces-sample-rate: 1.0
    exception-resolver-order: -2147483647

dsn
Sets the location to send events.
Create the DSN value copied above using env.
If this value is not set, it reads the environment variable SENTRY_DSN.
If the environment variable is also not set, the event is not sent.
traces-sample-rate
Controls the amount of transactions sent to Sentry in the event of an error.
Use numbers between 0 (0%) and 1 (100%).
For example, if you set 0.2, about 20% will be recorded and sent.
exception-resolver-order
Set the order of exception resolution programs. (Note)
When set to -2147483647(org.springframework.core.Ordered#HIGHEST_PRECEDENCE), errors handled by the Spring Exception Handler are not sent to Sentry.
For example, exceptions handled by try-catch are not passed to Sentry.

try {
    throw RuntimeException()    // It is not delivered to Sentry.
} catch (e: Exception) {
    throw CustomException()     // It is delivered to Sentry.
}

Monitoring

If Spring Boot fails at the end of setup