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Flaky test TestBatchProcessor/DroppedLogs #5384

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pellared opened this issue May 20, 2024 · 2 comments · Fixed by #5386 or #5421
Closed

Flaky test TestBatchProcessor/DroppedLogs #5384

pellared opened this issue May 20, 2024 · 2 comments · Fixed by #5386 or #5421
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area:logs Part of OpenTelemetry logs bug Something isn't working help wanted Extra attention is needed pkg:SDK Related to an SDK package
Milestone
v1.28.0

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@pellared
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https://github.com/open-telemetry/opentelemetry-go/actions/runs/9153962106/job/25163732175

go test -timeout 60s -short ./sdk/log/...
--- FAIL: TestBatchProcessor (0.06s)
    --- FAIL: TestBatchProcessor/DroppedLogs (0.01s)
make: *** [test/./sdk/log] Error 1
        batch_test.go:449: 
            	Error Trace:	/Users/runner/work/opentelemetry-go/opentelemetry-go/sdk/log/batch_test.go:449
            	Error:      	"" does not contain "\"level\"=1 \"msg\"=\"dropped log records\" \"dropped\"=1"
            	Test:       	TestBatchProcessor/DroppedLogs
@pellared pellared added bug Something isn't working help wanted Extra attention is needed pkg:SDK Related to an SDK package area:logs Part of OpenTelemetry logs labels May 20, 2024
MrAlias added a commit to MrAlias/opentelemetry-go that referenced this issue May 20, 2024
@MrAlias
Recheck log message in TestBatchProcessor
0dd02dc 
Fix open-telemetry#5384

On single-threaded, or in general slow, systems where the log message
may not be emitted, use assert.Everything to allow multiple lookups for
the expected log message.
@MrAlias MrAlias mentioned this issue May 20, 2024
Merged
@MrAlias MrAlias self-assigned this May 20, 2024
MrAlias added a commit that referenced this issue May 21, 2024
@MrAlias @XSAM
Recheck log message in TestBatchProcessor (#5386)
281aeb5 
Fix #5384

On single-threaded, or in general slow, systems where the log message
may not be emitted, use assert.Everything to allow multiple lookups for
the expected log message.

Co-authored-by: Sam Xie <sam@samxie.me>
@pellared pellared reopened this May 22, 2024
@pellared
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@MrAlias, it is still failing. See https://github.com/open-telemetry/opentelemetry-go/actions/runs/9184173706/job/25256066673?pr=5267

go test -timeout 60s -short ./sdk/log/...
--- FAIL: TestBatchProcessor (2.06s)
    --- FAIL: TestBatchProcessor/DroppedLogs (2.00s)
        batch_test.go:449: 
            	Error Trace:	/home/runner/work/opentelemetry-go/opentelemetry-go/sdk/log/batch_test.go:449
            	Error:      	Condition never satisfied
            	Test:       	TestBatchProcessor/DroppedLogs

@MrAlias MrAlias removed their assignment May 22, 2024
@amanakin amanakin mentioned this issue May 27, 2024
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@MrAlias
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MrAlias commented May 29, 2024

@amanakin is working on this.

@MrAlias MrAlias added this to the v1.28.0 milestone May 29, 2024
MrAlias pushed a commit that referenced this issue May 29, 2024
@amanakin @XSAM
sdk/log: Fix TestBatchProcessor/DroppedLogs flaky test (#5421)
982e96d 
Fix #5384

Run of `go test  -count=1000000 -run="TestBatchProcessor/DroppedLogs"`
**Before**:
Failed with either `Condition never satisfied` or panic
**After**:
Passed

First, bytes.Buffer is not thread-safe, so writing log and reading
(`bytes.String()`) caused panic. Added `concurrentBuffer`
Second, fixed flaky test with 4 records:
1. Record goes to `testExporter.Export` function and blocks in this
function because of `ExportTrigger`
(https://github.com/open-telemetry/opentelemetry-go/blob/19ee6d4775d578357e251828215213782eafed54/sdk/log/exporter_test.go#L87)
2. Record goes to `bufferExporter.input`
(https://github.com/open-telemetry/opentelemetry-go/blob/7c5e64cccc16710b2e75f3d60e96acc07dacd7a7/sdk/log/exporter.go#L129)
3. Record goes to `BatchProcessor.q` queue and it could not be enqueued
to export, because `bufferExporter.input` is full
4. Record goes to `BatchProcessor.q` and because of overfill, drops
third record

---------

Co-authored-by: Sam Xie <sam@samxie.me>
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Labels
area:logs Part of OpenTelemetry logs bug Something isn't working help wanted Extra attention is needed pkg:SDK Related to an SDK package
Projects
Go: Logs (GA)
Status: Done
Milestone
v1.28.0
2 participants
@pellared @MrAlias