Infinite background loop if ECONNREFUSED from oN.ingest.sentry.io

### Is there an existing issue for this?

- [x] I have checked for existing issues https://github.com/getsentry/sentry-javascript/issues
- [x] I have reviewed the documentation https://docs.sentry.io/
- [x] 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

10.33.0

### Framework Version

@sentry/node 10.33.0

### Link to Sentry event

_No response_

### Reproduction Example/SDK Setup

```js
const Sentry = require('@sentry/node');

const key = 'bbbbeeeeeeeeeeeeeffffffffffff';

Sentry.init({
  dsn: `https://${key}@o1.ingest.sentry.io/123`,
});

Sentry.captureException(new Error('wat'));
```

### Steps to Reproduce

1. add an entry to `/etc/hosts`: `0.0.0.0 o1.ingest.sentry.io`
2. run the code above

If you want more info, add `debug: true` to the `Sentry.init()` opts.

### Expected Result

Sentry should fail to send to the ingest DSN, and then the script should exit.

### Actual Result

Script loops forever.

# Example logs

With `debug: true`:

```
Sentry Logger [log]: Initializing Sentry: process: 1853533, thread: main.
Sentry Logger [log]: Cleared AI provider skip registrations
Sentry Logger [log]: Integration installed: InboundFilters
Sentry Logger [log]: Integration installed: FunctionToString
Sentry Logger [log]: Integration installed: LinkedErrors
Sentry Logger [log]: Integration installed: RequestData
Sentry Logger [log]: Integration installed: NodeSystemError
Sentry Logger [log]: Integration installed: Console
Sentry Logger [log]: Integration installed: OnUncaughtException
Sentry Logger [log]: Integration installed: OnUnhandledRejection
Sentry Logger [log]: Integration installed: ContextLines
Sentry Logger [log]: Integration installed: LocalVariablesAsync
Sentry Logger [log]: Integration installed: Context
Sentry Logger [log]: Integration installed: ChildProcess
Sentry Logger [log]: Integration installed: ProcessSession
Sentry Logger [log]: Integration installed: Modules
Sentry Logger [log]: Integration installed: Http
Sentry Logger [log]: Integration installed: NodeFetch
Sentry Logger [log]: SDK initialized from CommonJS
Sentry Logger [log]: @opentelemetry/api: Registered a global for diag v1.9.0.
Sentry Logger [log]: @opentelemetry/api: Registered a global for trace v1.9.0.
Sentry Logger [log]: @opentelemetry/api: Registered a global for propagation v1.9.0.
Sentry Logger [log]: @opentelemetry/api: Registered a global for context v1.9.0.
Sentry Logger [log]: Captured error event `wat`
Sentry Logger [warn]: Discarded session because of missing or non-string release
Sentry Logger [log]: Recording outcome: "network_error:error"
Sentry Logger [error]: Encountered error running transport request: Error: connect ECONNREFUSED 0.0.0.0:443
    at TCPConnectWrap.afterConnect [as oncomplete] (node:net:1637:16) {
  errno: -111,
  code: 'ECONNREFUSED',
  syscall: 'connect',
  address: '0.0.0.0',
  port: 443
}
Sentry Logger [error]: Error while sending envelope: Error: connect ECONNREFUSED 0.0.0.0:443
    at TCPConnectWrap.afterConnect [as oncomplete] (node:net:1637:16) {
  errno: -111,
  code: 'ECONNREFUSED',
  syscall: 'connect',
  address: '0.0.0.0',
  port: 443
}
Sentry Logger [log]: Flushing outcomes...
Sentry Logger [log]: Sending outcomes: [ { reason: 'network_error', category: 'error', quantity: 1 } ]
Sentry Logger [log]: Recording outcome: "network_error:internal"
Sentry Logger [error]: Encountered error running transport request: Error: connect ECONNREFUSED 0.0.0.0:443
    at TCPConnectWrap.afterConnect [as oncomplete] (node:net:1637:16) {
  errno: -111,
  code: 'ECONNREFUSED',
  syscall: 'connect',
  address: '0.0.0.0',
  port: 443
}
Sentry Logger [error]: Error while sending envelope: Error: connect ECONNREFUSED 0.0.0.0:443
    at TCPConnectWrap.afterConnect [as oncomplete] (node:net:1637:16) {
  errno: -111,
  code: 'ECONNREFUSED',
  syscall: 'connect',
  address: '0.0.0.0',
  port: 443
}
Sentry Logger [log]: Flushing outcomes...
Sentry Logger [log]: Sending outcomes: [ { reason: 'network_error', category: 'internal', quantity: 1 } ]
Sentry Logger [log]: Recording outcome: "network_error:internal"
Sentry Logger [error]: Encountered error running transport request: Error: connect ECONNREFUSED 0.0.0.0:443
    at TCPConnectWrap.afterConnect [as oncomplete] (node:net:1637:16) {
  errno: -111,
  code: 'ECONNREFUSED',
  syscall: 'connect',
  address: '0.0.0.0',
  port: 443
}
Sentry Logger [error]: Error while sending envelope: Error: connect ECONNREFUSED 0.0.0.0:443
    at TCPConnectWrap.afterConnect [as oncomplete] (node:net:1637:16) {
  errno: -111,
  code: 'ECONNREFUSED',
  syscall: 'connect',
  address: '0.0.0.0',
  port: 443
}
Sentry Logger [log]: Flushing outcomes...
Sentry Logger [log]: Sending outcomes: [ { reason: 'network_error', category: 'internal', quantity: 1 } ]
Sentry Logger [log]: Recording outcome: "network_error:internal"
Sentry Logger [error]: Encountered error running transport request: Error: connect ECONNREFUSED 0.0.0.0:443
    at TCPConnectWrap.afterConnect [as oncomplete] (node:net:1637:16) {
  errno: -111,
  code: 'ECONNREFUSED',
  syscall: 'connect',
  address: '0.0.0.0',
  port: 443
}
Sentry Logger [error]: Error while sending envelope: Error: connect ECONNREFUSED 0.0.0.0:443
    at TCPConnectWrap.afterConnect [as oncomplete] (node:net:1637:16) {
  errno: -111,
  code: 'ECONNREFUSED',
  syscall: 'connect',
  address: '0.0.0.0',
  port: 443
}
Sentry Logger [log]: Flushing outcomes...
Sentry Logger [log]: Sending outcomes: [ { reason: 'network_error', category: 'internal', quantity: 1 } ]
Sentry Logger [log]: Recording outcome: "network_error:internal"
Sentry Logger [error]: Encountered error running transport request: Error: connect ECONNREFUSED 0.0.0.0:443
    at TCPConnectWrap.afterConnect [as oncomplete] (node:net:1637:16) {
  errno: -111,
  code: 'ECONNREFUSED',
  syscall: 'connect',
  address: '0.0.0.0',
  port: 443
}
Sentry Logger [error]: Error while sending envelope: Error: connect ECONNREFUSED 0.0.0.0:443
    at TCPConnectWrap.afterConnect [as oncomplete] (node:net:1637:16) {
  errno: -111,
  code: 'ECONNREFUSED',
  syscall: 'connect',
  address: '0.0.0.0',
  port: 443
}
Sentry Logger [log]: Flushing outcomes...
Sentry Logger [log]: Sending outcomes: [ { reason: 'network_error', category: 'internal', quantity: 1 } ]
Sentry Logger [log]: Recording outcome: "network_error:internal"
Sentry Logger [error]: Encountered error running transport request: Error: connect ECONNREFUSED 0.0.0.0:443
    at TCPConnectWrap.afterConnect [as oncomplete] (node:net:1637:16) {
  errno: -111,
  code: 'ECONNREFUSED',
  syscall: 'connect',
  address: '0.0.0.0',
  port: 443
}
Sentry Logger [error]: Error while sending envelope: Error: connect ECONNREFUSED 0.0.0.0:443
    at TCPConnectWrap.afterConnect [as oncomplete] (node:net:1637:16) {
  errno: -111,
  code: 'ECONNREFUSED',
  syscall: 'connect',
  address: '0.0.0.0',
  port: 443
}
...
```

### Additional Context

Encountered while running Sentry in a locked down environment.  The `/etc/hosts` entry is an attempt to recreate that.

Relates to today's email "Final reminder: Sentry's ingestion endpoints change tomorrow (Jan 13)".  It reads:

> Once the update completes, the old IPs will no longer work and ingestion traffic may fail.

It may be that the impact is bigger than just ingestion traffic failing.

### Workarounds

The infinite loop can be avoided by:

1. setting `sendClientReports: false` in `Sentry.init({ ... })`
2. calling `Sentry.close()` at the end of the script

### Priority

<sub>React with 👍 to help prioritize this issue. Please use comments to provide useful context, avoiding `+1` or `me too`, to help us triage it.</sub>

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Uh oh!

Infinite background loop if ECONNREFUSED from oN.ingest.sentry.io #18802

Is there an existing issue for this?

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Uh oh!

Infinite background loop if ECONNREFUSED from oN.ingest.sentry.io #18802

Description

Is there an existing issue for this?

How do you use Sentry?

Which SDK are you using?

SDK Version

Framework Version

Link to Sentry event

Reproduction Example/SDK Setup

Steps to Reproduce

Expected Result

Actual Result

Example logs

Additional Context

Workarounds

Priority

Metadata

Metadata

Assignees

Labels

Fields

Projects

Milestone

Relationships

Development

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