Details
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Bug
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Status: Closed (View Workflow)
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Major
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Resolution: Fixed
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10.2.5
Description
The field PAGE_MAX_TRX_ID only matters in secondary index leaf pages. It was expected to be 0 on all other pages until the field is put into some other use.
(MDEV-6076 repurposed the field in clustered index root pages for a persistent AUTO_INCREMENT value. MDEV-11369 and MDEV-11424 may repurpose it in further clustered index pages.)
When running innodb.innodb-wl5522-debug or innodb_zip.wl5522_debug_zip with innodb_page_size=4k, an assertion in btr_page_reorganize_low() is failing:
/* PAGE_MAX_TRX_ID must be zero on non-leaf pages other than
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clustered index root pages. */
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ut_ad(recovery
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|| page_get_max_trx_id(page) == 0
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|| (dict_index_is_sec_or_ibuf(index)
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? page_is_leaf(temp_page)
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: page_is_root(temp_page)));
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An easy fix would be to relax the assertion:
/* PAGE_MAX_TRX_ID must be zero on non-leaf pages other than
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clustered index root pages. */
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ut_ad(recovery
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|| page_get_max_trx_id(page) == 0
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|| dict_index_is_sec_or_ibuf(index)
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|| page_is_root(temp_page));
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But I would like to study why this happens. Maybe we are not clearing PAGE_MAX_TRX_ID when splitting a secondary index leaf page.
Attachments
Issue Links
- causes
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- Closed
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- relates to
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MDEV-6076 Persistent AUTO_INCREMENT for InnoDB
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- Closed
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- Closed
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- Closed
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Activity
bb-10.2-marko rebased to latest 10.2 (fixing a result after MDEV-11995). No change to the patch.
This bug impacts MDEV-6076 (persistent AUTO_INCREMENT) when using IMPORT TABLESPACE with data files on which IMPORT TABLESPACE has been used before MariaDB 10.2.6. In those cases, the AUTO_INCREMENT value will be restored to a bogus value (something that was a transaction ID in the previous IMPORT).
With innodb_page_size=32k and innodb_page_size=64k, also the relaxed assertion is failing for innodb.innodb-wl5522-debug, for the clustered index.
In the clustered index the PAGE_MAX_TRX_ID field should always have been 0 until
MDEV-6076repurposed it for the root page only:2017-02-24 12:46:44 140590992532224 [Note] InnoDB: Phase II - Purge records from index `PRIMARY`2017-02-24 12:46:44 0x7fdde42b2300 InnoDB: Assertion failure in file /mariadb/server/storage/innobase/btr/btr0btr.cc line 1625InnoDB: Failing assertion: recovery || page_get_max_trx_id(page) == 0 || dict_index_is_sec_or_ibuf(index) || page_is_root(temp_page)