ec3d02019e
OTel Collector prints the following error when a target disappears:
```
2022-04-13T14:20:24.932-0400 warn scrape/scrape.go:1408 Stale append failed {"kind": "receiver", "name": "prometheus", "scrape_pool": "beep-boop", "target": "http://localhost:9090/metrics", "error": "transaction aborted"}
```
This `transaction aborted` error is returned by the custom appender that is
used by the collector when the context of the appender is cancelled:
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||
|---|---|---|
| .. | ||
| testdata | ||
| helpers_test.go | ||
| manager.go | ||
| manager_test.go | ||
| scrape.go | ||
| scrape_test.go | ||
| target.go | ||
| target_test.go | ||