Flaky test TestPipeline

The test TestPipeline is flaky and different sub-tests of it fails from time to time.

Job #1411728893 failed for 9c8b281c:

=== RUN   TestPipeline
=== RUN   TestPipeline/single_blob
=== RUN   TestPipeline/single_blob_without_objects
=== RUN   TestPipeline/multiple_blobs
=== RUN   TestPipeline/multiple_blobs_with_filter
=== RUN   TestPipeline/tree
=== RUN   TestPipeline/tree_without_objects
=== RUN   TestPipeline/tree_with_blob_filter
=== RUN   TestPipeline/revision_range
=== RUN   TestPipeline/revision_range_without_objects
=== RUN   TestPipeline/--all_with_all_filters
=== RUN   TestPipeline/invalid_revision
=== RUN   TestPipeline/mixed_valid_and_invalid_revision
=== RUN   TestPipeline/invalid_revision_with_all_filters
=== RUN   TestPipeline/context_cancellation
    pipeline_test.go:290: 
        	Error Trace:	pipeline_test.go:290
        	Error:      	Received unexpected error:
        	            	rev-list pipeline command: signal: terminated
        	Test:       	TestPipeline/context_cancellation
=== RUN   TestPipeline/interleaving_object_reads
--- FAIL: TestPipeline (0.69s)
    --- PASS: TestPipeline/single_blob (0.01s)
    --- PASS: TestPipeline/single_blob_without_objects (0.01s)
    --- PASS: TestPipeline/multiple_blobs (0.01s)
    --- PASS: TestPipeline/multiple_blobs_with_filter (0.01s)
    --- PASS: TestPipeline/tree (0.01s)
    --- PASS: TestPipeline/tree_without_objects (0.01s)
    --- PASS: TestPipeline/tree_with_blob_filter (0.01s)
    --- PASS: TestPipeline/revision_range (0.01s)
    --- PASS: TestPipeline/revision_range_without_objects (0.02s)
    --- PASS: TestPipeline/--all_with_all_filters (0.04s)
    --- PASS: TestPipeline/invalid_revision (0.00s)
    --- PASS: TestPipeline/mixed_valid_and_invalid_revision (0.00s)
    --- PASS: TestPipeline/invalid_revision_with_all_filters (0.00s)
    --- FAIL: TestPipeline/context_cancellation (0.01s)
    --- PASS: TestPipeline/interleaving_object_reads (0.51s)

another failing test case: https://gitlab.com/gitlab-org/gitaly/-/jobs/1407104868

=== RUN   TestPipeline
=== RUN   TestPipeline/single_blob
=== RUN   TestPipeline/single_blob_without_objects
=== RUN   TestPipeline/multiple_blobs
=== RUN   TestPipeline/multiple_blobs_with_filter
=== RUN   TestPipeline/tree
=== RUN   TestPipeline/tree_without_objects
=== RUN   TestPipeline/tree_with_blob_filter
=== RUN   TestPipeline/revision_range
=== RUN   TestPipeline/revision_range_without_objects
=== RUN   TestPipeline/--all_with_all_filters
=== RUN   TestPipeline/invalid_revision
=== RUN   TestPipeline/mixed_valid_and_invalid_revision
=== RUN   TestPipeline/invalid_revision_with_all_filters
=== RUN   TestPipeline/context_cancellation
    pipeline_test.go:290: 
        	Error Trace:	pipeline_test.go:290
        	Error:      	Received unexpected error:
        	            	rev-list pipeline command: signal: terminated
        	Test:       	TestPipeline/context_cancellation
=== RUN   TestPipeline/interleaving_object_reads
--- FAIL: TestPipeline (1.06s)
    --- PASS: TestPipeline/single_blob (0.01s)
    --- PASS: TestPipeline/single_blob_without_objects (0.02s)
    --- PASS: TestPipeline/multiple_blobs (0.02s)
    --- PASS: TestPipeline/multiple_blobs_with_filter (0.01s)
    --- PASS: TestPipeline/tree (0.01s)
    --- PASS: TestPipeline/tree_without_objects (0.01s)
    --- PASS: TestPipeline/tree_with_blob_filter (0.01s)
    --- PASS: TestPipeline/revision_range (0.02s)
    --- PASS: TestPipeline/revision_range_without_objects (0.02s)
    --- PASS: TestPipeline/--all_with_all_filters (0.04s)
    --- PASS: TestPipeline/invalid_revision (0.01s)
    --- PASS: TestPipeline/mixed_valid_and_invalid_revision (0.01s)
    --- PASS: TestPipeline/invalid_revision_with_all_filters (0.01s)
    --- FAIL: TestPipeline/context_cancellation (0.01s)
    --- PASS: TestPipeline/interleaving_object_reads (0.82s)

/cc @zj-gitlab @pks-t

added Category:Gitaly devopscreate failureflaky-test groupgitaly labels

#3693 (closed)

mentioned in merge request !3658 (merged)

assigned to @pks-t

changed milestone to %14.1

@8bitlife Right. I was thinking about context cancellation in the context of the batch process, but not about the spawned git-rev-list(1) command. Should be fixed via !3658 (merged).

added workflowin dev label

mentioned in commit 5fdd1ba6

closed with merge request !3658 (merged)