[CASSANDRA-5520] Query tracing session info inconsistent with events info

• Type: Improvement
• Status: Resolved
• Priority: Low
• Resolution: Fixed
• Fix Version/s: 1.2.7
• Component/s: Legacy/Tools

Environment

Linux

• Assignee: Tom Hobbs Assign to me
• Reporter: Ilya Kirnos

Authors

Tom Hobbs

Reviewers

Jonathan Ellis

• Created: 28/Apr/13 06:50
• Updated: 16/Apr/19 09:32
• Resolved: 11/Jul/13 19:21

Description

Session info for a trace is showing that a query took > 10 seconds (it timed out).

cqlsh:system_traces> select session_id, duration, request from sessions where session_id = c7e36a30-af3a-11e2-9ec9-772ec39805fe;
session_id | duration | request
------------------------------------------------------------
c7e36a30-af3a-11e2-9ec9-772ec39805fe | 10000230 | multiget_slice
However, the event-level breakdown shows no such large duration:
cqlsh:system_traces> select * from events where session_id = c7e36a30-af3a-11e2-9ec9-772ec39805fe;
session_id | event_id | activity | source | source_elapsed | thread
-------------------------------------------------------------------------------------------------------------------------------------------------+-----------------------
c7e36a30-af3a-11e2-9ec9-772ec39805fe | c7e36a30-af3a-11e2-9480-e9d811e0fc18 | Message received from /xxx.xxx.90.147 | xxx.xxx.4.16 | 19 | Thread-57
c7e36a30-af3a-11e2-9ec9-772ec39805fe | c7e36a31-af3a-11e2-9ec9-772ec39805fe | Sending message to /xxx.xxx.153.16 | xxx.xxx.90.147 | 246 | WRITE-/xxx.xxx.4.16
c7e36a30-af3a-11e2-9ec9-772ec39805fe | c7e39140-af3a-11e2-9480-e9d811e0fc18 | Message received from /xxx.xxx.90.147 | xxx.xxx.4.16 | 259 | Thread-57
c7e36a30-af3a-11e2-9ec9-772ec39805fe | c7e39140-af3a-11e2-9ec9-772ec39805fe | Sending message to /10.248.106.37 | xxx.xxx.90.147 | 253 | WRITE-/xxx.xxx.79.52
c7e36a30-af3a-11e2-9ec9-772ec39805fe | c7e39140-af3a-11e2-b8dc-a7032a583115 | Message received from /xxx.xxx.90.147 | xxx.xxx.213.136 | 25 | Thread-94
c7e36a30-af3a-11e2-9ec9-772ec39805fe | c7e39141-af3a-11e2-9480-e9d811e0fc18 | Executing single-partition query on CardHash | xxx.xxx.4.16 | 421 | ReadStage:5329
c7e36a30-af3a-11e2-9ec9-772ec39805fe | c7e39141-af3a-11e2-9ec9-772ec39805fe | Sending message to /xxx.xxx.151.214 | xxx.xxx.90.147 | 310 | WRITE-/xxx.xxx.213.136
c7e36a30-af3a-11e2-9ec9-772ec39805fe | c7e39141-af3a-11e2-b8dc-a7032a583115 | Message received from /xxx.xxx.90.147 | xxx.xxx.213.136 | 106 | Thread-94
c7e36a30-af3a-11e2-9ec9-772ec39805fe | c7e39142-af3a-11e2-9480-e9d811e0fc18 | Acquiring sstable references | xxx.xxx.4.16 | 444 | ReadStage:5329
c7e36a30-af3a-11e2-9ec9-772ec39805fe | c7e39142-af3a-11e2-9ec9-772ec39805fe | Sending message to /10.248.106.37 | xxx.xxx.90.147 | 352 | WRITE-/xxx.xxx.79.52
c7e36a30-af3a-11e2-9ec9-772ec39805fe | c7e39142-af3a-11e2-b8dc-a7032a583115 | Executing single-partition query on CardHash | xxx.xxx.213.136 | 144 | ReadStage:11
c7e36a30-af3a-11e2-9ec9-772ec39805fe | c7e39143-af3a-11e2-9480-e9d811e0fc18 | Merging memtable contents | xxx.xxx.4.16 | 472 | ReadStage:5329
c7e36a30-af3a-11e2-9ec9-772ec39805fe | c7e39143-af3a-11e2-9ec9-772ec39805fe | Sending message to /10.248.95.237 | xxx.xxx.90.147 | 362 | WRITE-/xxx.xxx.201.218
c7e36a30-af3a-11e2-9ec9-772ec39805fe | c7e39143-af3a-11e2-b8dc-a7032a583115 | Acquiring sstable references | xxx.xxx.213.136 | 164 | ReadStage:11
c7e36a30-af3a-11e2-9ec9-772ec39805fe | c7e39144-af3a-11e2-9480-e9d811e0fc18 | Merging data from memtables and 0 sstables | xxx.xxx.4.16 | 510 | ReadStage:5329
c7e36a30-af3a-11e2-9ec9-772ec39805fe | c7e39144-af3a-11e2-9ec9-772ec39805fe | Sending message to /xxx.xxx.151.214 | xxx.xxx.90.147 | 376 | WRITE-/xxx.xxx.213.136
c7e36a30-af3a-11e2-9ec9-772ec39805fe | c7e39144-af3a-11e2-b8dc-a7032a583115 | Merging memtable contents | xxx.xxx.213.136 | 195 | ReadStage:11
c7e36a30-af3a-11e2-9ec9-772ec39805fe | c7e39145-af3a-11e2-9480-e9d811e0fc18 | Read 0 live cells and 0 tombstoned | xxx.xxx.4.16 | 530 | ReadStage:5329
c7e36a30-af3a-11e2-9ec9-772ec39805fe | c7e39145-af3a-11e2-9ec9-772ec39805fe | Sending message to /10.248.95.237 | xxx.xxx.90.147 | 401 | WRITE-/xxx.xxx.201.218
c7e36a30-af3a-11e2-9ec9-772ec39805fe | c7e39145-af3a-11e2-b8dc-a7032a583115 | Executing single-partition query on CardHash | xxx.xxx.213.136 | 202 | ReadStage:41
c7e36a30-af3a-11e2-9ec9-772ec39805fe | c7e39146-af3a-11e2-9480-e9d811e0fc18 | Enqueuing response to /xxx.xxx.90.147 | xxx.xxx.4.16 | 572 | ReadStage:5329
c7e36a30-af3a-11e2-9ec9-772ec39805fe | c7e39146-af3a-11e2-9ec9-772ec39805fe | Sending message to /xxx.xxx.153.16 | xxx.xxx.90.147 | 489 | WRITE-/xxx.xxx.4.16
c7e36a30-af3a-11e2-9ec9-772ec39805fe | c7e39146-af3a-11e2-b8dc-a7032a583115 | Acquiring sstable references | xxx.xxx.213.136 | 215 | ReadStage:41
c7e36a30-af3a-11e2-9ec9-772ec39805fe | c7e39147-af3a-11e2-9480-e9d811e0fc18 | Executing single-partition query on CardHash | xxx.xxx.4.16 | 610 | ReadStage:5330
c7e36a30-af3a-11e2-9ec9-772ec39805fe | c7e39147-af3a-11e2-b8dc-a7032a583115 | Merging data from memtables and 0 sstables | xxx.xxx.213.136 | 239 | ReadStage:11
c7e36a30-af3a-11e2-9ec9-772ec39805fe | c7e39148-af3a-11e2-9480-e9d811e0fc18 | Acquiring sstable references | xxx.xxx.4.16 | 625 | ReadStage:5330
c7e36a30-af3a-11e2-9ec9-772ec39805fe | c7e39148-af3a-11e2-b8dc-a7032a583115 | Merging memtable contents | xxx.xxx.213.136 | 242 | ReadStage:41
c7e36a30-af3a-11e2-9ec9-772ec39805fe | c7e39149-af3a-11e2-9480-e9d811e0fc18 | Sending message to /xxx.xxx.152.81 | xxx.xxx.4.16 | 627 | WRITE-/xxx.xxx.90.147
c7e36a30-af3a-11e2-9ec9-772ec39805fe | c7e39149-af3a-11e2-b8dc-a7032a583115 | Read 0 live cells and 0 tombstoned | xxx.xxx.213.136 | 258 | ReadStage:11
c7e36a30-af3a-11e2-9ec9-772ec39805fe | c7e3914a-af3a-11e2-9480-e9d811e0fc18 | Merging memtable contents | xxx.xxx.4.16 | 646 | ReadStage:5330
c7e36a30-af3a-11e2-9ec9-772ec39805fe | c7e3914a-af3a-11e2-b8dc-a7032a583115 | Merging data from memtables and 0 sstables | xxx.xxx.213.136 | 287 | ReadStage:41
c7e36a30-af3a-11e2-9ec9-772ec39805fe | c7e3914b-af3a-11e2-9480-e9d811e0fc18 | Merging data from memtables and 0 sstables | xxx.xxx.4.16 | 679 | ReadStage:5330
c7e36a30-af3a-11e2-9ec9-772ec39805fe | c7e3914b-af3a-11e2-b8dc-a7032a583115 | Enqueuing response to /xxx.xxx.90.147 | xxx.xxx.213.136 | 301 | ReadStage:11
c7e36a30-af3a-11e2-9ec9-772ec39805fe | c7e3914c-af3a-11e2-9480-e9d811e0fc18 | Read 0 live cells and 0 tombstoned | xxx.xxx.4.16 | 704 | ReadStage:5330
c7e36a30-af3a-11e2-9ec9-772ec39805fe | c7e3914c-af3a-11e2-b8dc-a7032a583115 | Read 0 live cells and 0 tombstoned | xxx.xxx.213.136 | 311 | ReadStage:41
c7e36a30-af3a-11e2-9ec9-772ec39805fe | c7e3914d-af3a-11e2-9480-e9d811e0fc18 | Enqueuing response to /xxx.xxx.90.147 | xxx.xxx.4.16 | 763 | ReadStage:5330
c7e36a30-af3a-11e2-9ec9-772ec39805fe | c7e3914d-af3a-11e2-b8dc-a7032a583115 | Enqueuing response to /xxx.xxx.90.147 | xxx.xxx.213.136 | 354 | ReadStage:41
c7e36a30-af3a-11e2-9ec9-772ec39805fe | c7e3914e-af3a-11e2-b8dc-a7032a583115 | Sending message to /xxx.xxx.152.81 | xxx.xxx.213.136 | 374 | WRITE-/xxx.xxx.90.147
c7e36a30-af3a-11e2-9ec9-772ec39805fe | c7e3b850-af3a-11e2-9ec9-772ec39805fe | Message received from /xxx.xxx.213.136 | xxx.xxx.90.147 | 1289 | Thread-80
c7e36a30-af3a-11e2-9ec9-772ec39805fe | c7e3b850-af3a-11e2-9f00-0b1bd79b59b0 | Message received from /xxx.xxx.90.147 | xxx.xxx.79.52 | 28 | Thread-71
c7e36a30-af3a-11e2-9ec9-772ec39805fe | c7e3b851-af3a-11e2-9ec9-772ec39805fe | Processing response from /xxx.xxx.213.136 | xxx.xxx.90.147 | 1370 | RequestResponseStage:8
c7e36a30-af3a-11e2-9ec9-772ec39805fe | c7e3b852-af3a-11e2-9ec9-772ec39805fe | Message received from /xxx.xxx.4.16 | xxx.xxx.90.147 | 1533 | Thread-1435
c7e36a30-af3a-11e2-9ec9-772ec39805fe | c7e3b853-af3a-11e2-9ec9-772ec39805fe | Processing response from /xxx.xxx.4.16 | xxx.xxx.90.147 | 1598 | RequestResponseStage:7
c7e36a30-af3a-11e2-9ec9-772ec39805fe | c7e3df60-af3a-11e2-9ec9-772ec39805fe | Message received from /xxx.xxx.79.52 | xxx.xxx.90.147 | 2527 | Thread-143
c7e36a30-af3a-11e2-9ec9-772ec39805fe | c7e3df60-af3a-11e2-9f00-0b1bd79b59b0 | Message received from /xxx.xxx.90.147 | xxx.xxx.79.52 | 280 | Thread-71
c7e36a30-af3a-11e2-9ec9-772ec39805fe | c7e3df61-af3a-11e2-9ec9-772ec39805fe | Processing response from /xxx.xxx.79.52 | xxx.xxx.90.147 | 2604 | RequestResponseStage:6
c7e36a30-af3a-11e2-9ec9-772ec39805fe | c7e3df61-af3a-11e2-9f00-0b1bd79b59b0 | Executing single-partition query on CardHash | xxx.xxx.79.52 | 424 | ReadStage:6435
c7e36a30-af3a-11e2-9ec9-772ec39805fe | c7e3df62-af3a-11e2-9f00-0b1bd79b59b0 | Acquiring sstable references | xxx.xxx.79.52 | 445 | ReadStage:6435
c7e36a30-af3a-11e2-9ec9-772ec39805fe | c7e3df63-af3a-11e2-9f00-0b1bd79b59b0 | Merging memtable contents | xxx.xxx.79.52 | 474 | ReadStage:6435
c7e36a30-af3a-11e2-9ec9-772ec39805fe | c7e3df64-af3a-11e2-9f00-0b1bd79b59b0 | Merging data from memtables and 0 sstables | xxx.xxx.79.52 | 525 | ReadStage:6435
c7e36a30-af3a-11e2-9ec9-772ec39805fe | c7e3df65-af3a-11e2-9f00-0b1bd79b59b0 | Read 0 live cells and 0 tombstoned | xxx.xxx.79.52 | 545 | ReadStage:6435
c7e36a30-af3a-11e2-9ec9-772ec39805fe | c7e3df66-af3a-11e2-9f00-0b1bd79b59b0 | Enqueuing response to /xxx.xxx.90.147 | xxx.xxx.79.52 | 603 | ReadStage:6435
c7e36a30-af3a-11e2-9ec9-772ec39805fe | c7e3df67-af3a-11e2-9f00-0b1bd79b59b0 | Executing single-partition query on CardHash | xxx.xxx.79.52 | 617 | ReadStage:6436
c7e36a30-af3a-11e2-9ec9-772ec39805fe | c7e3df68-af3a-11e2-9f00-0b1bd79b59b0 | Acquiring sstable references | xxx.xxx.79.52 | 632 | ReadStage:6436
c7e36a30-af3a-11e2-9ec9-772ec39805fe | c7e3df69-af3a-11e2-9f00-0b1bd79b59b0 | Merging memtable contents | xxx.xxx.79.52 | 656 | ReadStage:6436
c7e36a30-af3a-11e2-9ec9-772ec39805fe | c7e3df6a-af3a-11e2-9f00-0b1bd79b59b0 | Sending message to /xxx.xxx.152.81 | xxx.xxx.79.52 | 657 | WRITE-/xxx.xxx.90.147
c7e36a30-af3a-11e2-9ec9-772ec39805fe | c7e3df6b-af3a-11e2-9f00-0b1bd79b59b0 | Merging data from memtables and 0 sstables | xxx.xxx.79.52 | 697 | ReadStage:6436
c7e36a30-af3a-11e2-9ec9-772ec39805fe | c7e3df6c-af3a-11e2-9f00-0b1bd79b59b0 | Read 0 live cells and 0 tombstoned | xxx.xxx.79.52 | 718 | ReadStage:6436
c7e36a30-af3a-11e2-9ec9-772ec39805fe | c7e3df6d-af3a-11e2-9f00-0b1bd79b59b0 | Enqueuing response to /xxx.xxx.90.147 | xxx.xxx.79.52 | 766 | ReadStage:6436
c7e36a30-af3a-11e2-9ec9-772ec39805fe | c7e40670-af3a-11e2-b266-75b700b21012 | Message received from /xxx.xxx.90.147 | xxx.xxx.201.218 | 23 | Thread-47
c7e36a30-af3a-11e2-9ec9-772ec39805fe | c7e40671-af3a-11e2-b266-75b700b21012 | Message received from /xxx.xxx.90.147 | xxx.xxx.201.218 | 81 | Thread-47
c7e36a30-af3a-11e2-9ec9-772ec39805fe | c7e40672-af3a-11e2-b266-75b700b21012 | Executing single-partition query on CardHash | xxx.xxx.201.218 | 150 | ReadStage:58
c7e36a30-af3a-11e2-9ec9-772ec39805fe | c7e40673-af3a-11e2-b266-75b700b21012 | Executing single-partition query on CardHash | xxx.xxx.201.218 | 158 | ReadStage:60
c7e36a30-af3a-11e2-9ec9-772ec39805fe | c7e40674-af3a-11e2-b266-75b700b21012 | Acquiring sstable references | xxx.xxx.201.218 | 175 | ReadStage:58
c7e36a30-af3a-11e2-9ec9-772ec39805fe | c7e40675-af3a-11e2-b266-75b700b21012 | Acquiring sstable references | xxx.xxx.201.218 | 176 | ReadStage:60
c7e36a30-af3a-11e2-9ec9-772ec39805fe | c7e40676-af3a-11e2-b266-75b700b21012 | Merging memtable contents | xxx.xxx.201.218 | 201 | ReadStage:58
c7e36a30-af3a-11e2-9ec9-772ec39805fe | c7e40677-af3a-11e2-b266-75b700b21012 | Merging memtable contents | xxx.xxx.201.218 | 201 | ReadStage:60
c7e36a30-af3a-11e2-9ec9-772ec39805fe | c7e40678-af3a-11e2-b266-75b700b21012 | Merging data from memtables and 0 sstables | xxx.xxx.201.218 | 240 | ReadStage:58
c7e36a30-af3a-11e2-9ec9-772ec39805fe | c7e40679-af3a-11e2-b266-75b700b21012 | Merging data from memtables and 0 sstables | xxx.xxx.201.218 | 243 | ReadStage:60
c7e36a30-af3a-11e2-9ec9-772ec39805fe | c7e4067a-af3a-11e2-b266-75b700b21012 | Read 0 live cells and 0 tombstoned | xxx.xxx.201.218 | 264 | ReadStage:58
c7e36a30-af3a-11e2-9ec9-772ec39805fe | c7e4067b-af3a-11e2-b266-75b700b21012 | Read 0 live cells and 0 tombstoned | xxx.xxx.201.218 | 264 | ReadStage:60
c7e36a30-af3a-11e2-9ec9-772ec39805fe | c7e4067c-af3a-11e2-b266-75b700b21012 | Enqueuing response to /xxx.xxx.90.147 | xxx.xxx.201.218 | 310 | ReadStage:60
c7e36a30-af3a-11e2-9ec9-772ec39805fe | c7e4067d-af3a-11e2-b266-75b700b21012 | Enqueuing response to /xxx.xxx.90.147 | xxx.xxx.201.218 | 310 | ReadStage:58
c7e36a30-af3a-11e2-9ec9-772ec39805fe | c7e4067e-af3a-11e2-b266-75b700b21012 | Sending message to /xxx.xxx.152.81 | xxx.xxx.201.218 | 369 | WRITE-/xxx.xxx.90.147