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Type: Build Failure
Resolution: Fixed
Priority: Major - P3
Fix Version/s: WT12.0.0, 8.3.0-rc0
Affects Version/s: None
Component/s: Checkpoints
Labels:
- BB-Tools
- CI-blocker

Assigned Teams:

Storage Engines, Storage Engines - Foundations
Sprint:
SE Foundations - 2025-09-12
Story Points:
1
Evergreen Project:
- wiredtiger
Failure Type:
- failed
Failing Buildvariants:
- ubuntu2004
Failing Tasks:
First Failing Revision:
- 7905a2d3ca62678928dd8c6bb5e9ff408e17089d(wiredtiger)
Linked BFG List:
https://buildbaron.corp.mongodb.com/ui/#/bf/WT-15351
Count of Linked BFGs (Last 30 days):
3

unit-test-hook-tiered on ubuntu2004

Host: i-0ebaf51f3bcd8bab0
Project: wiredtiger
Commit: 7905a2d3
Please refer to BF(G) Playbook for instructions on handling BF and BFG tickets as well as Auto-Resolution Rules

Task Logs:

task unit-test-hook-tiered

unit-test-hook-tiered task_log

Logs:

"[1756843527:700061][3340:0x7faa03f91cc0], WT_SESSION.close: [WT_VERB_DEFAULT][ERROR]: __wt_scr_discard, 381: scratch buffer allocated and never discarded: __wt_disagg_advance_checkpoint: 1398
"[1756843688:010031][3340:0x7faa03f91cc0], WT_SESSION.close: [WT_VERB_DEFAULT][ERROR]: __wt_scr_discard, 381: scratch buffer allocated and never discarded: __wt_disagg_advance_checkpoint: 1398
"[1756843692:398794][3340:0x7faa03f91cc0], WT_SESSION.close: [WT_VERB_DEFAULT][ERROR]: __wt_scr_discard, 381: scratch buffer allocated and never discarded: __wt_disagg_advance_checkpoint: 1398

logs

unit-test-hook-tiered task_log

Logs:

[pid:3140]: FAIL: test_layered23.test_layered23.test_leader_follower(palm)
----------------------------------------------------------------------
[pid:3140]: testtools.testresult.real._StringException: Traceback (most recent call last):
  File "/data/mci/9873fd131a5382eec43904ee55893d27/wiredtiger/test/suite/wttest.py", line 571, in tearDown
    self.captureerr.check(self)
  File "/data/mci/9873fd131a5382eec43904ee55893d27/wiredtiger/test/suite/../py_utility/abstract_test_case.py", line 111, in check
    testcase.fail('unexpected ' + self.desc + ', contains: "' +
  File "/opt/mongodbtoolchain/revisions/8695910c32ef0ee5eecaae4c9ca515b4b6436a40/stow/python3-v5.raI/lib/python3.10/unittest/case.py", line 675, in fail
    raise self.failureException(msg)
AssertionError: unexpected error output, contains: "[1756843527:700061][3340:0x7faa03f91cc0], WT_SESSION.close: [WT_VERB_DEFAULT][ERROR]: __wt_scr_discard, 381: scratch buffer allocated and never discarded: __wt_disagg_advance_checkpoint: 1398
"
======================================================================
[pid:3140]: FAIL: test_layered37.test_layered37.test_ping_ingest_table(palm)
----------------------------------------------------------------------
[pid:3140]: testtools.testresult.real._StringException: Traceback (most recent call last):
  File "/data/mci/9873fd131a5382eec43904ee55893d27/wiredtiger/test/suite/wttest.py", line 571, in tearDown
    self.captureerr.check(self)
  File "/data/mci/9873fd131a5382eec43904ee55893d27/wiredtiger/test/suite/../py_utility/abstract_test_case.py", line 111, in check
    testcase.fail('unexpected ' + self.desc + ', contains: "' +
  File "/opt/mongodbtoolchain/revisions/8695910c32ef0ee5eecaae4c9ca515b4b6436a40/stow/python3-v5.raI/lib/python3.10/unittest/case.py", line 675, in fail
    raise self.failureException(msg)
AssertionError: unexpected error output, contains: "[1756843688:010031][3340:0x7faa03f91cc0], WT_SESSION.close: [WT_VERB_DEFAULT][ERROR]: __wt_scr_discard, 381: scratch buffer allocated and never discarded: __wt_disagg_advance_checkpoint: 1398
"
======================================================================
[pid:3140]: FAIL: test_layered47.test_layered47.test_layered47(palm)
----------------------------------------------------------------------
[pid:3140]: testtools.testresult.real._StringException: Traceback (most recent call last):
  File "/data/mci/9873fd131a5382eec43904ee55893d27/wiredtiger/test/suite/wttest.py", line 571, in tearDown
    self.captureerr.check(self)
  File "/data/mci/9873fd131a5382eec43904ee55893d27/wiredtiger/test/suite/../py_utility/abstract_test_case.py", line 111, in check
    testcase.fail('unexpected ' + self.desc + ', contains: "' +
  File "/opt/mongodbtoolchain/revisions/8695910c32ef0ee5eecaae4c9ca515b4b6436a40/stow/python3-v5.raI/lib/python3.10/unittest/case.py", line 675, in fail
    raise self.failureException(msg)
AssertionError: unexpected error output, contains: "[1756843692:398794][3340:0x7faa03f91cc0], WT_SESSION.close: [WT_VERB_DEFAULT][ERROR]: __wt_scr_discard, 381: scratch buffer allocated and never discarded: __wt_disagg_advance_checkpoint: 1398
"
----------------------------------------------------------------------
Ran 14341 tests in 5487.950s

logs

unit-test-hook-tiered task_log

Logs:

[1756843527:700061][3340:0x7faa03f91cc0], WT_SESSION.close: [WT_VERB_DEFAULT][ERROR]: __wt_scr_discard, 381: scratch buffer allocated and never discarded: __wt_disagg_advance_checkpoint: 1398
[1756843688:010031][3340:0x7faa03f91cc0], WT_SESSION.close: [WT_VERB_DEFAULT][ERROR]: __wt_scr_discard, 381: scratch buffer allocated and never discarded: __wt_disagg_advance_checkpoint: 1398
[1756843692:398794][3340:0x7faa03f91cc0], WT_SESSION.close: [WT_VERB_DEFAULT][ERROR]: __wt_scr_discard, 381: scratch buffer allocated and never discarded: __wt_disagg_advance_checkpoint: 1398

logs

is related to

WT-15353 Skip test_cc05.py in disagg as named checkpoints are not supported

Closed

WT-15354 Re-enable several checkpoint cleanup Python tests for disagg

Closed

WT-15359 Simplify the obsolete check logic

Closed

related to

WT-15086 Eviction thread panic during connection close with disagg enabled

Closed

WT-15204 test_cc02.py fails with AssertionError: 1 != 0 (obsolete_on_disk mismatch)

Closed

WT-15205 test_cc09.py fails with AssertionError: Checkpoint cleanup did not read anything

Closed

WT-15239 Set durable timestamp during recovery in disagg

Closed

WT-15311 Fix for disagg: "value time window has a start time before its parent's oldest start time"

Closed

WT-15210 Change eviction to scrub eviction when the cache usage is less than eviction target

Closed

WT-15315 Add 8.2 into the compatibility tests

Closed

WT-14836 Add support for unclean shutdown in compatibility tests

Closed

(6 related to)

Assignee:: Jie Chen
Reporter:: xgen-buildbaron-user
Votes:: 0 Vote for this issue
Watchers:: 2 Start watching this issue

Created:: Sep 02 2025 11:35:14 PM UTC
Updated:: Sep 05 2025 11:20:29 AM UTC
Resolved:: Sep 03 2025 09:47:12 AM UTC

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