Joe McDonnell created IMPALA-15205:
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             Summary: TestConjuncts.test_create_cache_many_tables fails on 
coverage build
                 Key: IMPALA-15205
                 URL: https://issues.apache.org/jira/browse/IMPALA-15205
             Project: IMPALA
          Issue Type: Bug
          Components: Test
    Affects Versions: Impala 5.0.0
            Reporter: Joe McDonnell


On our exhaustive build with code coverage, 
TestConjuncts.test_create_cache_many_tables fails with:
{noformat}
custom_cluster/test_conjuncts.py:121: in test_create_cache_many_tables
    assert mem_after - mem_before < 25 * 1024 * 1024, "Memory usage increased 
during " \
E   AssertionError: Memory usage increased during sleep. Before: 292945920 
After: 320700416
E   assert (320700416 - 292945920) < ((25 * 1024) * 1024)
        _TestConjuncts__wait_for_270mb = <function 
TestConjuncts.test_create_cache_many_tables.<locals>.__wait_for_270mb at 
0x7f2aa0e1db20>
        handle     = <tests.common.impala_connection.OperationHandle object at 
0x7f2a3a920ad0>
        mem_after  = 320700416
        mem_before = 292945920
        self       = <tests.custom_cluster.test_conjuncts.TestConjuncts object 
at 0x7f2a973b5310>
        unique_database = 'test_create_cache_many_tables_49a1d922'{noformat}
This seems to be unique to the coverage build. We could use a different limit 
for the coverage build or disable this specific test.



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