Crons lead to unusual 10% load increase

[Angelodaniel]

Integration

sentry-spring-boot-starter-jakarta

Java Version

Spring boot 3.2.2

Version

7.2.0

Steps to Reproduce

spring boot application 3.2.2
annotation: @SentryCheckIn(value = "x", heartbeat = true)
SDK version: io.sentry:sentry-spring-boot-starter-jakarta:7.2.0
Looks like that the gc_memory_promoted_bytes_total is much higher than usual

Expected Result

Not a big increase in load increase

Actual Result

I’ve noticed that enabling the cron SDK in our Spring Boot application leads to an unusual 10% load increase on one of the three instances in our cluster. This behavior is apparent even when the scheduler isn’t active, as it’s set to run in the morning.

┆Issue is synchronized with this Jira Improvement by Unito

[adinauer]

@Angelodaniel do you know if other Sentry annotations have been used before (e.g. @SentrySpan, @SentryTransaction) or if crons is the first AOP feature in use?

I'll try to reproduce and see if there's something we can do about it.

[adinauer]

@Angelodaniel is there only a single @Scheduled method that runs in the morning and nothing else?

[adinauer]

@Angelodaniel does this only happen when the server has been running for a while or can it be observed immediately?

[adinauer]

@Angelodaniel is the method annotated with @SentryCheckIn also called from other places? e.g. when a request is performed?

sorry for the many separate messages

[adinauer]

As a workaround, you could try to use CheckInUtils.withCheckIn instead of the annotation and see if that helps. See https://docs.sentry.io/platforms/java/crons/#check-ins-recommended

If that alone doesn't work, you might have to combine it with sentry.enable-aot-compatibility=true to disable AOP features. Be aware though this also disabled other Sentry annotations like @SentryTransaction and @SentrySpan.

[stockii]

Hello, I can jump in here and answer your questions @Angelodaniel

@Angelodaniel do you know if other Sentry annotations have been used before (e.g. @SentrySpan, @SentryTransaction) or if crons is the first AOP feature in use?

I'll try to reproduce and see if there's something we can do about it.

Only the @SentryCheckIn was used.

@Angelodaniel is there only a single @scheduled method that runs in the morning and nothing else?
No we have multiple Scheduler running, but only one got the @SentryCheckIn Annotation.

@Angelodaniel is the method annotated with @SentryCheckIn also called from other places? e.g. when a request is performed?
nope, only via Scheduler Annotation

@Angelodaniel does this only happen when the server has been running for a while or can it be observed immediately?

immediately

[adinauer]

@stockii thank you for your answers, we'll investigate and report back here.

[adinauer]

@stockii so far I haven't been able to confirm the load increase on our Spring Boot 3 sample. Have you had any luck with the workaround in #3165 (comment) ?