Details
Major - P3 Description
A recent Evergreen build on Windows variant, an assertion failure occurred in test_schema06.test_index_stress, detecting unexpected statistics value for session level schema lock wait.
[2018/12/06 15:32:30.035] FAIL: test_schema06.test_schema06.test_index_stress -s 1 (lsm)
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[2018/12/06 15:32:30.035] ----------------------------------------------------------------------
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[2018/12/06 15:32:30.035] Traceback (most recent call last):
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[2018/12/06 15:32:30.035] File "C:\data\mci\300ac2a4d2673480bf34a312429edb7e\wiredtiger\test\suite\test_schema06.py", line 105, in test_index_stress
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[2018/12/06 15:32:30.035] self.assertTrue(stat_value > 0)
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[2018/12/06 15:32:30.035] AssertionError: False is not true
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The assertion failed with an expected stat_value in below code context:
95 # Test the session level schema lock wait statistic. The schema lock
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96 # wait is seen for the lsm table only. Concurrent lsm worker threads
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97 # could require an in-memory chunk switch under a schema lock.
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98 if self.idx_config == ',type=lsm':
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99 found = False
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100 stat_cur = self.session.open_cursor('statistics:session', None, None)
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101 while stat_cur.next() == 0:
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102 [desc, pvalue, stat_value] = stat_cur.get_values()
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103 if desc == 'session: schema lock wait time (usecs)':
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104 found = True
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105 self.assertTrue(stat_value > 0)
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106 self.assertEqual(found, True)
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