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https://issues.apache.org/jira/browse/CASSANDRA-16693?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17351047#comment-17351047
]
Ekaterina Dimitrova commented on CASSANDRA-16693:
-------------------------------------------------
+1, thank youÂ
> Flaky TestPaxos.test_replica_availability
> -----------------------------------------
>
> Key: CASSANDRA-16693
> URL: https://issues.apache.org/jira/browse/CASSANDRA-16693
> Project: Cassandra
> Issue Type: Bug
> Components: Test/dtest/python
> Reporter: Berenguer Blasi
> Assignee: Berenguer Blasi
> Priority: Normal
> Fix For: 4.0-rc2, 4.0, 4.x
>
>
> Flaky
> [TestPaxos.test_replica_availability|https://ci-cassandra.apache.org/job/Cassandra-4.0/55/testReport/junit/dtest.paxos_test/TestPaxos/test_replica_availability/]
> {noformat}
> Error Message
> cassandra.Unavailable: Error from server: code=1000 [Unavailable exception]
> message="Cannot achieve consistency level SERIAL" info={'consistency':
> 'SERIAL', 'required_replicas': 2, 'alive_replicas': 1}
> Stacktrace
> self = <paxos_test.TestPaxos object at 0x7ff6f83299d0>
> def test_replica_availability(self):
> """
> @jira_ticket CASSANDRA-8640
>
> Regression test for a bug (CASSANDRA-8640) that required all
> nodes to
> be available in order to run LWT queries, even if the query could
> complete correctly with quorum nodes available.
> """
> session = self.prepare(nodes=3, rf=3)
> session.execute("CREATE TABLE test (k int PRIMARY KEY, v int)")
> session.execute("INSERT INTO test (k, v) VALUES (0, 0) IF NOT EXISTS")
>
> self.cluster.nodelist()[2].stop()
> session.execute("INSERT INTO test (k, v) VALUES (1, 1) IF NOT EXISTS")
>
> self.cluster.nodelist()[1].stop()
> assert_unavailable(session.execute, "INSERT INTO test (k, v) VALUES
> (2, 2) IF NOT EXISTS")
>
> self.cluster.nodelist()[1].start()
> > session.execute("INSERT INTO test (k, v) VALUES (3, 3) IF NOT EXISTS")
> paxos_test.py:58:
> _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
> _
> ../venv/src/cassandra-driver/cassandra/cluster.py:2618: in execute
> return self.execute_async(query, parameters, trace, custom_payload,
> timeout, execution_profile, paging_state, host, execute_as).result()
> _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
> _
> self = <ResponseFuture: query='<SimpleStatement query="INSERT INTO test (k,
> v) VALUES (3, 3) IF NOT EXISTS", consistency=Not ...el SERIAL"
> info={'consistency': 'SERIAL', 'required_replicas': 2, 'alive_replicas': 1}
> coordinator_host=127.0.0.1:9042>
> def result(self):
> """
> Return the final result or raise an Exception if errors were
> encountered. If the final result or error has not been set
> yet, this method will block until it is set, or the timeout
> set for the request expires.
>
> Timeout is specified in the Session request execution functions.
> If the timeout is exceeded, an :exc:`cassandra.OperationTimedOut`
> will be raised.
> This is a client-side timeout. For more information
> about server-side coordinator timeouts, see
> :class:`.policies.RetryPolicy`.
>
> Example usage::
>
> >>> future = session.execute_async("SELECT * FROM mycf")
> >>> # do other stuff...
>
> >>> try:
> ... rows = future.result()
> ... for row in rows:
> ... ... # process results
> ... except Exception:
> ... log.exception("Operation failed:")
>
> """
> self._event.wait()
> if self._final_result is not _NOT_SET:
> return ResultSet(self, self._final_result)
> else:
> > raise self._final_exception
> E cassandra.Unavailable: Error from server: code=1000 [Unavailable
> exception] message="Cannot achieve consistency level SERIAL"
> info={'consistency': 'SERIAL', 'required_replicas': 2, 'alive_replicas': 1}
> ../venv/src/cassandra-driver/cassandra/cluster.py:4894: Unavailable
> {noformat}
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