[jira] [Created] (HBASE-28254) Flaky test: TestTableShell

["Andor Molnar (Jira)" <ji...@apache.org>]

Andor Molnar created HBASE-28254:
------------------------------------

             Summary: Flaky test: TestTableShell
                 Key: HBASE-28254
                 URL: https://issues.apache.org/jira/browse/HBASE-28254
             Project: HBase
          Issue Type: Test
          Components: flakies, integration tests
            Reporter: Andor Molnar
            Assignee: Andor Molnar


The test is running the following Ruby commands:

 
{noformat}
# 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)
{noformat}
And validate the versions with:
{noformat}
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')
{noformat}
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.



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