Michael Shuler created CASSANDRA-11539:
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Summary: dtest failure in topology_test.TestTopology.movement_test
Key: CASSANDRA-11539
URL: https://issues.apache.org/jira/browse/CASSANDRA-11539
Project: Cassandra
Issue Type: Test
Components: Testing
Reporter: Michael Shuler
Assignee: DS Test Eng
Fix For: 3.x
example failure:
{noformat}
Error Message
values not within 16.00% of the max: (335.88, 404.31) ()
-------------------- >> begin captured logging << --------------------
dtest: DEBUG: cluster ccm directory: /mnt/tmp/dtest-XGOyDd
dtest: DEBUG: Custom init_config not found. Setting defaults.
dtest: DEBUG: Done setting configuration options:
{ 'num_tokens': None,
'phi_convict_threshold': 5,
'range_request_timeout_in_ms': 10000,
'read_request_timeout_in_ms': 10000,
'request_timeout_in_ms': 10000,
'truncate_request_timeout_in_ms': 10000,
'write_request_timeout_in_ms': 10000}
--------------------- >> end captured logging << ---------------------
Stacktrace
File "/usr/lib/python2.7/unittest/case.py", line 329, in run
testMethod()
File "/home/automaton/cassandra-dtest/topology_test.py", line 93, in
movement_test
assert_almost_equal(sizes[1], sizes[2])
File "/home/automaton/cassandra-dtest/assertions.py", line 75, in
assert_almost_equal
assert vmin > vmax * (1.0 - error) or vmin == vmax, "values not within
%.2f%% of the max: %s (%s)" % (error * 100, args, error_message)
"values not within 16.00% of the max: (335.88, 404.31) ()\n--------------------
>> begin captured logging << --------------------\ndtest: DEBUG: cluster ccm
directory: /mnt/tmp/dtest-XGOyDd\ndtest: DEBUG: Custom init_config not found.
Setting defaults.\ndtest: DEBUG: Done setting configuration options:\n{
'num_tokens': None,\n 'phi_convict_threshold': 5,\n
'range_request_timeout_in_ms': 10000,\n 'read_request_timeout_in_ms':
10000,\n 'request_timeout_in_ms': 10000,\n
'truncate_request_timeout_in_ms': 10000,\n 'write_request_timeout_in_ms':
10000}\n--------------------- >> end captured logging << ---------------------"
{noformat}
http://cassci.datastax.com/job/cassandra-3.5_novnode_dtest/22/testReport/topology_test/TestTopology/movement_test
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I dug through this test's history on the trunk, 3.5, 3.0, and 2.2 branches. It
appears this test is stable and passing on 3.0 & 2.2 (which could be just
luck). On trunk & 3.5, however, this test has flapped a small number of times.
The test's threshold is 16% and I found test failures in the 3.5 branch of
16.2%, 16.9%, and 18.3%. In trunk I found 17.4% and 23.5% diff failures.
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