[HBASE-28254] Flaky test: TestTableShell - ASF JIRA

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Details

Type: Test
Status: Resolved
Priority: Major
Resolution: Fixed
Affects Version/s: None
Fix Version/s: 2.6.0, 2.4.18, 4.0.0-alpha-1, 2.5.8, 3.0.0-beta-2
Component/s: flakies, integration tests
Labels:
None

Description

The test is running the following Ruby commands:

# Instert test data
@test_table.put(1, "x:a", 1)
@test_table.put(2, "x:raw1", 11)
@test_table.put(2, "x:raw1", 11)
@test_table.put(2, "x:raw1", 11)
@test_table.put(2, "x:raw1", 11)

And validate the versions with:

args = { VERSIONS => 10, RAW => true } # Since 4 versions of row with rowkey 2 is been added, we can use any number >= 4 for VERSIONS to scan all 4 versions.
num_rows = 0
@test_table._scan_internal(args) do # Raw Scan
  num_rows += 1
end
# 5 since , 1 from row key '1' and other 4 from row key '4'
assert_equal(num_rows, 5,
             'Num rows scanned without RAW/VERSIONS are not 5')

Which sometimes (almost always on fast machines) fails, because it only finds 3 versions out of 4. I believe this due to commands are running too fast and inserts data with same timestamp, so HBase cannot distinguish them. I'd like to add some sleep between puts to fix it.