Memory leak: child span not ended when Root HTTP request is aborted

[gazanna]

What version of Elysia is running?

1.4.17

What platform is your computer?

Darwin 25.1.0 arm64 arm

What steps can reproduce the bug?

import { Elysia } from 'elysia'
import { opentelemetry } from '@elysiajs/opentelemetry'
import { trace } from '@opentelemetry/api'

const spans = new Map<string, { name: string, ended: boolean }>()

function instrumentSpans() {
  const originalGetTracer = trace.getTracer.bind(trace)

  trace.getTracer = function (...args: any[]) {
    const tracer = originalGetTracer(...args)
    const originalStartSpan = tracer.startSpan.bind(tracer)

    tracer.startSpan = function (name: string, options?: any, context?: any) {
      const span = originalStartSpan(name, options, context)
      const id = span.spanContext().spanId

      spans.set(id, { name, ended: false })

      const originalEnd = span.end.bind(span)
      span.end = function (...args: any[]) {
        const record = spans.get(id)
        if (record) record.ended = true
        return originalEnd(...args)
      }

      return span
    }

    return tracer
  }
}

async function test() {
  spans.clear()
  instrumentSpans()

  const app = new Elysia()
    .use(opentelemetry())
    .get('/slow', async () => {
      await new Promise(r => setTimeout(r, 10000))
      return 'done'
    })
    .listen(3400)

  const controller = new AbortController()
  const request = fetch('http://localhost:3400/slow', {
    signal: controller.signal
  }).catch(() => { })

  await new Promise(r => setTimeout(r, 100))
  controller.abort()
  await request
  await new Promise(r => setTimeout(r, 5000))

  const leaked = Array.from(spans.values()).filter(s => !s.ended)

  console.log(`Total spans: ${spans.size}`)
  console.log(`Leaked spans: ${leaked.length}`)

  if (leaked.length > 0) {
    console.log('\nLeaked:')
    leaked.forEach(s => { console.log(`  - ${s.name}`) })
  }

  app.stop()
  process.exit(leaked.length > 0 ? 1 : 0)
}

test()

What is the expected behavior?

to end child spans

What do you see instead?

No response

Additional information

When a client aborts an HTTP request (e.g., via AbortController), the OpenTelemetry Handle span is never ended, causing a memory leak.
child spans should end to avoid a memory leak

Have you try removing the node_modules and bun.lockb and try again yet?

No response