TestDefaultHarvesterGroup failing on CI

[jalvz]

Found in https://beats-ci.elastic.co/blue/organizations/jenkins/Beats%2Fbeats/detail/PR-25998/4/tests/

Output:

=== RUN   TestDefaultHarvesterGroup/assert_a_harvester_for_same_source_cannot_be_started
coverage: 42.5% of statements
panic: test timed out after 10m0s
goroutine 66 [running]:
testing.(*M).startAlarm.func1()
	/usr/local/go/src/testing/testing.go:1700 +0xe5
created by time.goFunc
	/usr/local/go/src/time/sleep.go:180 +0x45
goroutine 1 [chan receive, 9 minutes]:
testing.(*T).Run(0xc00066aa80, 0xcdb673, 0x19, 0xcfc760, 0x493101)
	/usr/local/go/src/testing/testing.go:1239 +0x2da
testing.runTests.func1(0xc0005c2300)
	/usr/local/go/src/testing/testing.go:1511 +0x78
testing.tRunner(0xc0005c2300, 0xc0005bfda8)
	/usr/local/go/src/testing/testing.go:1193 +0xef
testing.runTests(0xc000630000, 0x1247a00, 0x11, 0x11, 0xc0264ad7f42a101d, 0x8bb4bac924, 0x1255b60, 0xcd351f)
	/usr/local/go/src/testing/testing.go:1509 +0x2fe
testing.(*M).Run(0xc00062c000, 0x0)
	/usr/local/go/src/testing/testing.go:1417 +0x1eb
main.main()
	_testmain.go:141 +0x1c5
goroutine 45 [chan receive, 9 minutes]:
testing.(*T).Run(0xc00066af00, 0xcee234, 0x34, 0xc0005d1750, 0xd9bc01)
	/usr/local/go/src/testing/testing.go:1239 +0x2da
github.com/elastic/beats/v7/filebeat/input/filestream/internal/input-logfile.TestDefaultHarvesterGroup(0xc00066aa80)
	/go/src/github.com/elastic/beats/filebeat/input/filestream/internal/input-logfile/harvester_test.go:155 +0x18a
testing.tRunner(0xc00066aa80, 0xcfc760)
	/usr/local/go/src/testing/testing.go:1193 +0xef
created by testing.(*T).Run
	/usr/local/go/src/testing/testing.go:1238 +0x2b3
goroutine 50 [chan receive, 9 minutes]:
github.com/elastic/beats/v7/filebeat/input/filestream/internal/input-logfile.blockUntilCancelOnRun(0xc0005d17e0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, ...)
	/go/src/github.com/elastic/beats/filebeat/input/filestream/internal/input-logfile/harvester_test.go:354 +0x4e
github.com/elastic/beats/v7/filebeat/input/filestream/internal/input-logfile.(*mockHarvester).Run(0xc0005d27a0, 0xc0005d17e0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, ...)
	/go/src/github.com/elastic/beats/filebeat/input/filestream/internal/input-logfile/harvester_test.go:333 +0x19b
github.com/elastic/beats/v7/filebeat/input/filestream/internal/input-logfile.startHarvester.func1(0x7fee503e0f90, 0xc0005d5c00, 0x0, 0x0)
	/go/src/github.com/elastic/beats/filebeat/input/filestream/internal/input-logfile/harvester.go:204 +0x9a8
github.com/elastic/go-concert/unison.(*TaskGroup).Go.func1(0xc00066ead0, 0xc0005d5bc0)
	/go/pkg/mod/github.com/elastic/go-concert@v0.1.0/unison/taskgroup.go:124 +0x99
created by github.com/elastic/go-concert/unison.(*TaskGroup).Go
	/go/pkg/mod/github.com/elastic/go-concert@v0.1.0/unison/taskgroup.go:122 +0xda
goroutine 49 [sleep]:
time.Sleep(0x2dc6c0)
	/usr/local/go/src/runtime/time.go:193 +0xd2
github.com/elastic/beats/v7/filebeat/input/filestream/internal/input-logfile.TestDefaultHarvesterGroup.func5(0xc00066af00)
	/go/src/github.com/elastic/beats/filebeat/input/filestream/internal/input-logfile/harvester_test.go:170 +0x305
testing.tRunner(0xc00066af00, 0xc0005d1750)
	/usr/local/go/src/testing/testing.go:1193 +0xef
created by testing.(*T).Run
	/usr/local/go/src/testing/testing.go:1238 +0x2b3

Feel free to close if not appropiate

[urso]

@kvch Can you have a look?

[elasticmachine]

Pinging @elastic/agent (Team:Agent)

[botelastic]

Hi!
We just realized that we haven't looked into this issue in a while. We're sorry!

We're labeling this issue as Stale to make it hit our filters and make sure we get back to it as soon as possible. In the meantime, it'd be extremely helpful if you could take a look at it as well and confirm its relevance. A simple comment with a nice emoji will be enough :+1.
Thank you for your contribution!