Type:
Priority:
Resolution:
Fixed
Affects Version/s:
11.4
The following failure does not look like an actual error:
11.4 d2c9d86ed9465c814f7cbc29eaeb73274f550c5b
innodb.blob-crash '16k' w4 [ fail ] Found warnings/errors in server log file!
Test ended at 2024-05-22 15:26:23
line
2024-05-22 15:26:14 0 [ERROR] InnoDB: Checksum mismatch in the first page of file .//undo001
^ Found warnings in /home/buildbot/amd64-debian-sid/build/mysql-test/var/4/log/mysqld.1.err
In the error log we have the following:
11.4 d2c9d86ed9465c814f7cbc29eaeb73274f550c5b
2024-05-22 15:26:14 0 [Note] InnoDB: Using AVX512 instructions
2024-05-22 15:26:14 0 [Note] InnoDB: Using liburing
2024-05-22 15:26:14 0 [Note] InnoDB: Initializing buffer pool, total size = 8.000MiB, chunk size = 1.000MiB
2024-05-22 15:26:14 0 [Note] InnoDB: Completed initialization of buffer pool
2024-05-22 15:26:14 0 [ERROR] InnoDB: Checksum mismatch in the first page of file .//undo001
2024-05-22 15:26:14 0 [Note] InnoDB: Restoring page [page id: space=1, page number=0] of datafile './/undo001' from the doublewrite buffer. Writing 16384 bytes into file './/undo001'
2024-05-22 15:26:14 0 [Note] InnoDB: Starting crash recovery from checkpoint LSN=79160
2024-05-22 15:26:14 0 [Note] InnoDB: Multi-batch recovery needed at LSN 2104096
2024-05-22 15:26:14 0 [Note] InnoDB: End of log at LSN=4347308
2024-05-22 15:26:14 0 [Note] InnoDB: To recover: LSN 2104096/4347308; 189 pages
2024-05-22 15:26:14 0 [Note] InnoDB: To recover: LSN 4120277/4347308; 127 pages
2024-05-22 15:26:14 0 [Note] InnoDB: To recover: 18 pages
2024-05-22 15:26:14 0 [Note] InnoDB: 1 transaction(s) which must be rolled back or cleaned up in total 1 row operations to undo
2024-05-22 15:26:14 0 [Note] InnoDB: Trx id counter is 133
2024-05-22 15:26:14 0 [Note] InnoDB: Opened 3 undo tablespaces
2024-05-22 15:26:14 0 [Note] InnoDB: 128 rollback segments in 3 undo tablespaces are active.
2024-05-22 15:26:14 0 [Note] InnoDB: Starting in background the rollback of recovered transactions
2024-05-22 15:26:14 0 [Note] InnoDB: Removed temporary tablespace data file: "./ibtmp1"
2024-05-22 15:26:14 0 [Note] InnoDB: Setting file './ibtmp1' size to 12.000MiB. Physically writing the file full; Please wait ...
2024-05-22 15:26:14 0 [Note] InnoDB: Rolled back recovered transaction 131
2024-05-22 15:26:14 0 [Note] InnoDB: Rollback of non-prepared transactions completed
2024-05-22 15:26:14 0 [Note] InnoDB: File './ibtmp1' size is now 12.000MiB.
2024-05-22 15:26:14 0 [Note] InnoDB: log sequence number 4347308 (memory-mapped); transaction id 135
So, everything recovered just fine, and there is no need to scare users with that ERROR message. The Note InnoDB: Restoring page would have been enough. Only if the page could be restored from the doublewrite buffer, it should be reported as an error.
relates to
MDEV-11770
innodb.group_commit_crash_no_optimize_thread, innodb.group_commit_crash failed in buildbot
Open
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Bug
Major
Other prominent tests that were affected by this were innodb.101_compatibility and innodb_fts.crash_recovery, mainly in 11.x branches due to
MDEV-29986. The error messages were always issued for undo tablespace files, and in the failures that I checked, the corrupted page was recovered from the doublewrite buffer just fine. Both these tests kill and restart the server, which I think was a prerequisite for the error message to be issued.