Splunk Hec Receiver - Memory Leak (Cont of #34886)

[brettplarson]

Component(s)

receiver/splunkhec

What happened?

Description

We are still seeing an issue with the collector memory after upgrading to 0.109.0 with the fix. The behavior changed and we are now seeing more memory in the stack vs heap. Although the heap still grows slowly over time. Similar to before, removing the hec receiver from the logs pipeline gets rid of the issue. This is a test cluster where I can reproduce this sending metrics to the hec receiver.

• i'm wondering if this is still a continuation of the issue noted in splunkhec receiver memory leak #34886
  

One clue is that this is all under startlogop - the memory in startmetricsop seems normal - perhaps the way hec events are processed, as events first, is causing these to never end. forgive my speculation :)

Steps to Reproduce

send a ton of metrics to a hec endpoint and profile the memory.

Expected Result

memory should not be held in this way

Actual Result

Collector version

0.109.0

Environment information

Environment

OS: (e.g., "Ubuntu 20.04")
Compiler(if manually compiled): (e.g., "go 14.2")

OpenTelemetry Collector configuration

No response

Log output

No response

Additional context

We opened splunk case 3554107 as well.

[github-actions]

Pinging code owners:

• receiver/splunkhec: @atoulme

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[brettplarson]

Just bumping this. Thank you!