getsentry/sentry-javascript

High-memory usage when includeLocalVariables is enabled.

Opened this issue · 6 comments

canassa commented

Is there an existing issue for this?

How do you use Sentry?

Sentry Saas (sentry.io)

Which SDK are you using?

@sentry/node

SDK Version

10.15.0

Framework Version

No response

Link to Sentry event

No response

Reproduction Example/SDK Setup

sentryClient ??= Sentry.init({
    dsn: config.sentryDSN,
    environment: config.environment,
    includeLocalVariables: sentryOptions?.includeLocalVariables ?? true,
})

Steps to Reproduce

  • Deploy a NodeJS AWS lambda using Sentry with includeLocalVariables set to true
  • The following will show up in CloudWatch:
2025-09-23T08:09:07.650Z    Debugger listening on ws://127.0.0.1:44271/d9491547-4ba5-4a4f-b78f-0c1b424fc39e
2025-09-23T08:09:07.650Z    For help, see: https://nodejs.org/en/docs/inspector

Expected Result

includeLocalVariables should be able to capture the local variables without interfering with the application

Actual Result

The lambda will crash either immediately for after a few runs (memory leak?)

REPORT RequestId: 1c21914d-093b-5809-a3aa-f00152357227 Duration: 88045.34 ms Billed Duration: 88046 ms Memory Size: 3072 MB Max Memory Used: 3072 MB Status: error Error Type: Runtime.OutOfMemory

Note: The lambda is configured with 3GB RAM

Additional Context

Tip: React with 👍 to help prioritize this issue. Please use comments to provide useful context, avoiding +1 or me too, to help us triage it.

andreiborza commented

Hi @canassa, thanks for writing in.

Could you please provide some more context? Are you using our Lambda Layer, also you specified @sentry/node in the issue, are you using that or our @sentry/aws-serverless package tailored towards AWS?

canassa commented

Hi @andreiborza

Are you using our Lambda Layer

No

are you using that or our @sentry/aws-serverless package tailored towards AWS?

We are using @sentry/node directly and manually initialising Sentry with Sentry.init

andreiborza commented

Got it, thanks. Could you please provide a small reproduction repo of the lambda function?

canassa commented

@andreiborza

I’ll see if I can put one together.

  • 👍1
canassa commented

Just a quick update:

I created a minimal reproducible repo, but the memory leak does not appear there.
The issue is reproducible only in my main application, which I cannot share.

I’ll start stripping down parts of the main application to isolate the cause. Please keep this ticket open.

  • 👍1