Type:
Priority:
Resolution:
Fixed
Affects Version/s:
5.5(EOL) , 10.1(EOL) , 10.2(EOL) , 10.3(EOL) , 10.4(EOL) , 10.5
In a bug fix in MySQL 5.7.6 , the InnoDB function btr_cur_open_at_rnd_pos() was corrected so that it would return a status that indicates whether the cursor was successfully positioned. But this change was not correctly merged to MariaDB (Merge MySQL 5.7.9 , part of MDEV-6113 MDEV-8588
diff --git a/storage/innobase/btr/btr0cur.cc b/storage/innobase/btr/btr0cur.cc
index 349ae990edb..b23cacac227 100644
--- a/storage/innobase/btr/btr0cur.cc
+++ b/storage/innobase/btr/btr0cur.cc
@@ -2658,7 +2658,7 @@ btr_cur_open_at_rnd_pos_func(
index->table->file_unreadable = true;
}
- goto exit_loop;
+ break;
}
page = buf_block_get_frame(block);
@@ -2815,12 +2815,11 @@ btr_cur_open_at_rnd_pos_func(
n_blocks++;
}
- exit_loop:
if (UNIV_LIKELY_NULL(heap)) {
mem_heap_free(heap);
}
- return(true);
+ return err == DB_SUCCESS;
}
/*==================== B-TREE INSERT =========================*/
This problem was accidentally found by frequent crashes of the test innodb.leaf_page_corrupted_during_recovery after removing the function page_copy_rec_list_end_to_created_page() , in preparation for MDEV-12353
The symptoms were as follows:
mysqld: /mariadb/10.5/storage/innobase/btr/btr0cur.cc:7116: ulint btr_rec_get_externally_stored_len(const rec_t*, const ulint*): Assertion `!rec_offs_comp(offsets) || !rec_get_node_ptr_flag(rec)' failed.
…
#8 0x00005565cd35d2a8 in btr_rec_get_externally_stored_len (rec=0x7fe096f4807e "\200", offsets=0x7fe03c13a9c0) at /mariadb/10.5-merge/storage/innobase/btr/btr0cur.cc:7116
#9 0x00005565cd35cdd6 in btr_estimate_number_of_different_key_vals (index=0x7fe0640123e8) at /mariadb/10.5-merge/storage/innobase/btr/btr0cur.cc:6988
#10 0x00005565cd41a303 in dict_stats_update_transient_for_index (index=0x7fe0640123e8) at /mariadb/10.5-merge/storage/innobase/dict/dict0stats.cc:886
#11 0x00005565cd41a582 in dict_stats_update_transient (table=0x7fe064010658) at /mariadb/10.5-merge/storage/innobase/dict/dict0stats.cc:944
#12 0x00005565cd420701 in dict_stats_update (table=0x7fe064010658, stats_upd_option=DICT_STATS_RECALC_TRANSIENT) at /mariadb/10.5-merge/storage/innobase/dict/dict0stats.cc:3343
#13 0x00005565cd06f481 in dict_stats_init (table=0x7fe064010658) at /mariadb/10.5-merge/storage/innobase/include/dict0stats.ic:165
#14 0x00005565cd079df9 in ha_innobase::open (this=0x7fe03c13b8d0, name=0x7fe03c13efa8 "./test/t1") at /mariadb/10.5-merge/storage/innobase/handler/ha_innodb.cc:6020
The assertion would fail on the very first access on the table, after starting up with innodb_force_recovery=1 (to ignore the corruption that was injected to the leaf page).
made changes -
2019-09-11 12:42
issue.field.resolutiondate
2019-09-11 12:42:49.0
2019-09-11 12:42:49.516
made changes -
2019-09-11 12:42
Fix Version/s
10.2.28
[ 23910
]
Fix Version/s
10.3.19
[ 23908
]
Fix Version/s
10.4.9
[ 23906
]
Fix Version/s
10.2
[ 14601
]
Fix Version/s
10.3
[ 22126
]
Fix Version/s
10.4
[ 22408
]
Fix Version/s
10.5
[ 23123
]
Resolution
Fixed
[ 1
]
Status
Open
[ 1
]
Closed
[ 6
]
made changes -
2021-12-06 21:50
Workflow
MariaDB v3
[ 99589
]
MariaDB v4
[ 156728
]
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Bug
Major
MDEV-6113 merge 5.7 innodb
