Branimir Lambov created CASSANDRA-19145:
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Summary: Python dtest TestWriteFailures.test_paxos is failing with
Paxos V2
Key: CASSANDRA-19145
URL: https://issues.apache.org/jira/browse/CASSANDRA-19145
Project: Cassandra
Issue Type: Bug
Components: Feature/Lightweight Transactions
Reporter: Branimir Lambov
With configuration changed to engage Paxos V2 with repaired state purging, the
dtest fails with:
{code}
test_paxos
write_failures_test.TestWriteFailures
self = <write_failures_test.TestWriteFailures object at 0x7f396bb68910>
def test_paxos(self):
"""
A light transaction receives a WriteFailure
"""
> exc = self._perform_cql_statement("INSERT INTO mytable (key, value)
> VALUES ('key1', 'Value 1') IF NOT EXISTS")
write_failures_test.py:202:
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
write_failures_test.py:88: in _perform_cql_statement
session.execute(statement)
../env3.7/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='<BoundStatement query="INSERT INTO mytable (key,
value) VALUES ('key1', 'Value 1') IF NOT EXIS...ncy': 'SERIAL',
'required_responses': 2, 'received_responses': 1, 'write_type': 'CAS'}
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.WriteTimeout: Error from server: code=1100 [Coordinator
node timed out waiting for replica nodes' responses] message="CAS operation
timed out: received 1 of 2 required responses after 0 contention retries"
info={'consistency': 'SERIAL', 'required_responses': 2, 'received_responses':
1, 'write_type': 'CAS'}
../env3.7/src/cassandra-driver/cassandra/cluster.py:4894: WriteTimeout
{code}
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