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Russ Hatch commented on CASSANDRA-11195: ---------------------------------------- here's some tracing from the python driver when the error occurs. the first ccm node is acting as coordinator (127.0.0.1): {noformat} 127.0.0.1 ***** Parsing SELECT * FROM test 127.0.0.1 ***** Preparing statement 127.0.0.1 ***** Computing ranges to query 127.0.0.1 ***** Submitting range requests on 8 ranges with a concurrency of 1 (0.0 rows per range expected) 127.0.0.1 ***** Submitted 1 concurrent range requests 127.0.0.2 ***** RANGE_SLICE message received from /127.0.0.1 127.0.0.1 ***** Executing seq scan across 0 sstables for [3, max(9057792379311864889)] 127.0.0.2 ***** Executing seq scan across 0 sstables for (max(9057792379311864889), max(9063681715701432110)] 127.0.0.1 ***** Read 2 live and 0 tombstone cells 127.0.0.2 ***** Scanned 0 rows and matched 0 127.0.0.1 ***** Enqueuing request to /127.0.0.2 127.0.0.2 ***** Enqueuing response to /127.0.0.1 127.0.0.1 ***** Submitted 1 concurrent range requests 127.0.0.2 ***** Sending REQUEST_RESPONSE message to /127.0.0.1 127.0.0.1 ***** Sending RANGE_SLICE message to /127.0.0.2 127.0.0.1 ***** REQUEST_RESPONSE message received from /127.0.0.2 127.0.0.2 ***** RANGE_SLICE message received from /127.0.0.1 127.0.0.1 ***** Processing response from /127.0.0.2 127.0.0.2 ***** Executing seq scan across 0 sstables for (max(9066543152329569058), max(9149440404233844277)] 127.0.0.1 ***** Enqueuing request to /127.0.0.2 127.0.0.2 ***** Scanned 0 rows and matched 0 127.0.0.1 ***** Submitted 2 concurrent range requests 127.0.0.2 ***** Enqueuing response to /127.0.0.1 127.0.0.1 ***** Executing seq scan across 0 sstables for (max(9063681715701432110), max(9066543152329569058)] 127.0.0.2 ***** Sending REQUEST_RESPONSE message to /127.0.0.1 127.0.0.1 ***** Read 0 live and 0 tombstone cells 127.0.0.1 ***** Sending RANGE_SLICE message to /127.0.0.2 127.0.0.1 ***** REQUEST_RESPONSE message received from /127.0.0.2 127.0.0.1 ***** Processing response from /127.0.0.2 127.0.0.1 ***** Enqueuing request to /127.0.0.2 127.0.0.1 ***** Submitted 2 concurrent range requests 127.0.0.2 ***** RANGE_SLICE message received from /127.0.0.1 127.0.0.1 ***** Executing seq scan across 0 sstables for (max(9149440404233844277), max(9221933478161079123)] 127.0.0.2 ***** Executing seq scan across 0 sstables for [max(9221933478161079123), min(-9223372036854775808)] 127.0.0.1 ***** Read 0 live and 0 tombstone cells 127.0.0.2 ***** Scanned 0 rows and matched 0 127.0.0.1 ***** Sending RANGE_SLICE message to /127.0.0.2 127.0.0.2 ***** Enqueuing response to /127.0.0.1 127.0.0.1 ***** REQUEST_RESPONSE message received from /127.0.0.2 127.0.0.2 ***** Sending REQUEST_RESPONSE message to /127.0.0.1 127.0.0.1 ***** Processing response from /127.0.0.2 {noformat} > paging may returns incomplete results on small page size > -------------------------------------------------------- > > Key: CASSANDRA-11195 > URL: https://issues.apache.org/jira/browse/CASSANDRA-11195 > Project: Cassandra > Issue Type: Bug > Reporter: Jim Witschey > Labels: dtest > Attachments: node1.log, node1_debug.log, node2.log, node2_debug.log > > > This was found through a flapping test, and running that test is still the > easiest way to repro the issue. On CI we're seeing a 40-50% failure rate, but > locally this test fails much less frequently. > If I attach a python debugger and re-query the "bad" query, it continues to > return incomplete data indefinitely. If I go directly to cqlsh I can see all > rows just fine. -- This message was sent by Atlassian JIRA (v6.3.4#6332)