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https://issues.apache.org/jira/browse/CASSANDRA-18709?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17749336#comment-17749336
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Brandon Williams commented on CASSANDRA-18709:
----------------------------------------------
This is probably a timeout, since this test [absolutely relies on
timing|https://github.com/apache/cassandra-dtest/blame/trunk/jmx_test.py#L201],
but we can improve the error a bit:
{noformat}
===Flaky Test Report===
test_compactionstats failed and was not selected for rerun.
<class 'Exception'>
Compaction({taskUuid}, {progress} / {total} bytes)@{uuid}(keyspace1,
standard1) did not match Major compaction(633887a0-2fd6-11ee-b69d-fd97692b5e82,
0 / 426 bytes)@7ad54392-bcdd-35a6-8417-4e047860b377(system, local)
[<TracebackEntry /home/drift/cassandra-dtest/jmx_test.py:220>]
===End Flaky Test Report===
{noformat}
||Branch||CI||
|[trunk|https://github.com/driftx/cassandra/tree/CASSANDRA-18709-trunk]|[dtest
repeat|https://app.circleci.com/pipelines/github/driftx/cassandra/1155/workflows/96cb8a44-1394-42ce-a1c9-2bf70bd14af0/jobs/39962]
> Test failure: dtest.jmx_test.TestJMX.test_compactionstats
> ---------------------------------------------------------
>
> Key: CASSANDRA-18709
> URL: https://issues.apache.org/jira/browse/CASSANDRA-18709
> Project: Cassandra
> Issue Type: Bug
> Components: Test/dtest/python
> Reporter: Ekaterina Dimitrova
> Assignee: Brandon Williams
> Priority: Normal
> Fix For: 5.x
>
>
> Seen here:
> [https://ci-cassandra.apache.org/job/Cassandra-trunk/1646/testReport/dtest.jmx_test/TestJMX/test_compactionstats/]
> h3.
> {code:java}
> Error Message
> AttributeError: 'NoneType' object has no attribute 'named'
> Stacktrace
> self = <jmx_test.TestJMX object at 0x7fe78cfc2940> def
> test_compactionstats(self): """ @jira_ticket CASSANDRA-10504 @jira_ticket
> CASSANDRA-10427 Test that jmx MBean used by nodetool compactionstats properly
> updates the progress of a compaction """ cluster = self.cluster
> cluster.populate(1) node = cluster.nodelist()[0] cluster.start() # Run a
> quick stress command to create the keyspace and table node.stress(['write',
> 'n=1', 'no-warmup']) # Disable compaction on the table
> node.nodetool('disableautocompaction keyspace1 standard1')
> node.nodetool('setcompactionthroughput 1') node.stress(['write', 'n=150K',
> 'no-warmup']) node.flush() # Run a major compaction. This will be the
> compaction whose # progress we track. node.nodetool_process('compact') # We
> need to sleep here to give compaction time to start # Why not do something
> smarter? Because if the bug regresses, # we can't rely on jmx to tell us that
> compaction started. time.sleep(5) compaction_manager = make_mbean('db',
> type='CompactionManager') with JolokiaAgent(node) as jmx: progress_string =
> jmx.read_attribute(compaction_manager, 'CompactionSummary')[0] # Pause in
> between reads # to allow compaction to move forward time.sleep(2)
> updated_progress_string = jmx.read_attribute(compaction_manager,
> 'CompactionSummary')[0] var = 'Compaction@{uuid}(keyspace1, standard1,
> {progress}/{total})bytes' if self.cluster.version() >= LooseVersion('4.0'): #
> CASSANDRA-15954 var = 'Compaction({taskUuid}, {progress} / {total}
> bytes)@{uuid}(keyspace1, standard1)' > progress = int(parse.search(var,
> progress_string).named['progress']) E AttributeError: 'NoneType' object has
> no attribute 'named' jmx_test.py:218: AttributeError
> {code}
>
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