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Type: Bug
Resolution: Fixed
Priority: Major - P3
Fix Version/s: WT12.0.0, 8.3.0-rc0
Affects Version/s: None
Component/s: Test Python
Labels:
- Disag_Storage

Assigned Teams:

Storage Engines, Storage Engines - Transactions
Sprint:
SE Transactions - 2025-09-12
Story Points:
5

When running test_timestamp12.py with disagg hook, an assertion was raised getting unexpected keys after connection reopen (checkpoint):

======================================================================
[pid:6829]: FAIL: None
----------------------------------------------------------------------
[pid:6829]: Traceback (most recent call last):
  File "/home/ubuntu/work/wiredtiger/test/suite/wttest.py", line 243, in _callTestMethod
    method()
  File "/home/ubuntu/work/wiredtiger/test/suite/test_timestamp12.py", line 117, in test_timestamp_recovery
    self.verify_expected(logged_exp, ckpt_exp)
  File "/home/ubuntu/work/wiredtiger/test/suite/test_timestamp12.py", line 67, in verify_expected
    self.assertTrue(ckpt_actual == ckpt_exp)
AssertionError: False is not true

The check failed specifically for the below 2 close configuration types:

        ('dfl', dict(close_cfg='', all_expected=False)),
        ('use_stable', dict(close_cfg='use_timestamp=true', all_expected=False)),

The command to reproduce the failure:

$ python3 ../test/suite/run.py -v 2 --hook disagg test_timestamp12.py

causes

WT-15404 Audit Python tests with logged table to maintain test coverage in disagg

Open

is related to

WT-15438 Failed to promote a node to primary due to reconfigure returning WT_NOTFOUND

Closed

WT-15249 Add error check for incompatible config with write_timestamp_usage=never in disagg

Closed

WT-15300 Set backlink LSN in __wt_disagg_put_meta

Closed

WT-15396 Coverity analysis defect 175990: Calling risky function

Closed

WT-15405 Fix layered table key deletion and add a test for GC

Closed

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

Open

WT-15221 throw an error when logging and layered table are configured together

Open

WT-15412 Add a table id as part of the WT_BLOCK_DISAGG struct

Closed

WT-15428 Bypass materialisation frontier check on standby for eviction

Closed

WT-15401 Make test/model compatible with macOS

Closed

WT-15424 Add extra logging for disaggregated storage

Closed

WT-15389 Saved update lists with deletes are lost when building a delta

Closed

WT-15431 test/format (disagg.mode=leader) test/mode (disagg) assertion failure upd_memsize == 0

Closed

related to

WT-14904 Add more scenarios for the internal page deltas

Closed

WT-15213 Don't free the previous address cookie

Closed

WT-14981 Fix disagg hook to handle multithreading in tests

Closed

WT-15233 Fix behavior of dmalloc, dcalloc, drealloc used in testing to match malloc, etc.

Closed

WT-14786 Disagg python testing: triage test_timestamp*.py tests

Closed

WT-14911 Verify that the ingest table is always empty for primary

Closed

WT-15187 Don't build overflow keys or values in disagg

Closed

WT-15198 Data Validation for Leader/Follower Mode in Disagg (test/format)

Closed

WT-15240 Enable test_timestamp*.py for disagg in Evergreen

Closed

WT-15355 test_cache_evict_config02 cache stuck

Closed

WT-15437 failed: unit-test-hook-disagg-leader on ubuntu2004 [wiredtiger @ 2877a39f]

Closed

(9 is related to, 11 related to)

Assignee:: Linh Tran
Reporter:: Luke Chen
Votes:: 0 Vote for this issue
Watchers:: 4 Start watching this issue

Created:: Aug 22 2025 04:40:41 AM UTC
Updated:: Sep 12 2025 07:34:47 AM UTC
Resolved:: Sep 11 2025 01:37:27 AM UTC

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