datastore: TestIntegration_LargeQuery failed

[flaky-bot]

This test failed!

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If I'm commenting on this issue too often, add the flakybot: quiet label and
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commit: 370e23e
buildURL: Build Status, Sponge
status: failed

Test output

    integration_test.go:623: Count(limit=800 offset=0) returned 500, want 800
    integration_test.go:623: Count(limit=500 offset=500) returned 0, want 300
    integration_test.go:623: Count(limit=-1 offset=500) returned 0, want 300
    integration_test.go:623: Count(limit=1000 offset=100) returned 400, want 700
    integration_test.go:623: Count(limit=-1 offset=0) returned 500, want 800
    integration_test.go:623: Count(limit=501 offset=0) returned 500, want 501
    integration_test.go:623: Count(limit=1600 offset=0) returned 500, want 800
    integration_test.go:623: Count(limit=-1 offset=100) returned 400, want 700
    integration_test.go:702: count=200, limit=-1, offset=500: it.Next from cursor: no more items in iterator, want nil
    integration_test.go:702: count=500, limit=-1, offset=0: it.Next from cursor: no more items in iterator, want nil
    integration_test.go:633: GetAll(limit=500 offset=500) returned 0, want 300
    integration_test.go:633: GetAll(limit=-1 offset=500) returned 0, want 300
    integration_test.go:633: GetAll(limit=-1 offset=0) returned 500, want 800
    integration_test.go:633: GetAll(limit=800 offset=0) returned 500, want 800
    integration_test.go:633: GetAll(limit=1000 offset=100) returned 400, want 700
    integration_test.go:637: GetAll(limit=501 offset=0) got[500].I == 514; want 500

[flaky-bot]

Looks like this issue is flaky. 😟

I'm going to leave this open and stop commenting.

A human should fix and close this.

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When run at the same commit (370e23e), this test passed in one build (Build Status, Sponge) and failed in another build (Build Status, Sponge).

[telpirion]

Investigating this now.

[telpirion]

I think that there might be an issue with concurrent goroutines, multiple test runs (processes), and the placement of the query cursor. I'm going to try to break the failing test into three parts rather than running them concurrently.