High-memory usage when includeLocalVariables is enabled.

[canassa]

Is there an existing issue for this?

• I have checked for existing issues https://github.com/getsentry/sentry-javascript/issues
• I have reviewed the documentation https://docs.sentry.io/
• I am using the latest SDK release https://github.com/getsentry/sentry-javascript/releases

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

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[linear]

JS-995 High-memory usage when includeLocalVariables is enabled.

[andreiborza]

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]

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]

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