[#MDEV-335] Valgrind warning "Invalid read of size 8" in lock_rec_validate

== Invalid read of size 8

==26274==    at 0xB6EC68: lock_rec_validate_page (lock0lock.c:4962)

==26274==    by 0xB6EF87: lock_validate (lock0lock.c:5068)

==26274==    by 0xB6DD86: lock_print_info_all_transactions (lock0lock.c:4577)

==26274==    by 0xA6ACD8: srv_printf_innodb_monitor (srv0srv.c:2246)

==26274==    by 0xA6B88D: srv_monitor_thread (srv0srv.c:2563)

==26274==    by 0x503EEFB: start_thread (pthread_create.c:304)

==26274==    by 0x5CFF59C: clone (clone.S:112)

==26274==  Address 0x1f1753a0 is 688 bytes inside a block of size 872 free'd

==26274==    at 0x4C282E0: free (vg_replace_malloc.c:366)

==26274==    by 0xB82865: mem_area_free (mem0pool.c:523)

==26274==    by 0xB81214: mem_heap_block_free (mem0mem.c:511)

==26274==    by 0xB6219D: mem_heap_free_heap_top (mem0mem.ic:291)

==26274==    by 0xB62271: mem_heap_empty (mem0mem.ic:333)

==26274==    by 0xB6CEFD: lock_release_off_kernel (lock0lock.c:4150)

==26274==    by 0xA98A69: trx_commit_off_kernel (trx0trx.c:1043)

==26274==    by 0xA9A5C1: trx_commit_for_mysql (trx0trx.c:1774)

==26274==    by 0xA10271: innobase_commit_low(trx_struct*) (ha_innodb.cc:3164)

==26274==    by 0xA10464: innobase_commit_ordered_2(trx_struct*, THD*) (ha_innodb.cc:3250)

==26274==    by 0xA10829: innobase_commit(handlerton*, THD*, bool) (ha_innodb.cc:3364)

==26274==    by 0x7BFFEA: commit_one_phase_2(THD*, bool, THD_TRANS*, bool) (handler.cc:1373)

==26274==    by 0x7BFF49: ha_commit_one_phase(THD*, bool) (handler.cc:1356)

==26274==    by 0x7BFAB5: ha_commit_trans(THD*, bool) (handler.cc:1245)

==26274==    by 0x71A04A: trans_commit_stmt(THD*) (transaction.cc:299)

==26274==    by 0x6127C4: mysql_execute_command(THD*) (sql_parse.cc:4509)

Also once got an assertion failure (with the same test), not sure whether it's related or not:

InnoDB: Assertion failure in thread 539494144 in file read0read.ic line 36

InnoDB: Failing assertion: n < view->n_trx_ids

revision-id: timour@askmonty.org-20120604150600-1wsxbe8tqqidke1s

date: 2012-06-04 18:06:00 +0300

revno: 3426

Could not reproduce on maria/5.3, mysql-trunk, percona-server.
Could not reproduce with InnoDB plugin.

perl ./runall.pl \

--threads=8 \

--duration=1200 \

--queries=100M \

--valgrind \

--grammar=conf/engines/many_indexes.yy \

--gendata=conf/engines/many_indexes.zz \

--engine=InnoDB \

--basedir=<your basedir> --vardir=<your vardir>

To see valgrind warnings, you'll need to check the server error log afterwards (or watch it while the test is running).

The command line above runs the test with 8 threads – in fact, concurrent flow is not required, it can be done with 1 thread only. But the issue seems to be sporadic, and it takes longer with one thread.

Happened every time I ran the test, but sometimes, depending on luck and the machine, although sometimes it took almost all 20 min given as test duration in the parameters. Normally it happens in 3-6 min after the real test flow starts (after RQG said "Loading Validator" for each thread).

[MDEV-335] Valgrind warning "Invalid read of size 8" in lock_rec_validate_page on DML flow Created: 2012-06-13 Updated: 2012-08-28 Resolved: 2012-08-28
Status:	Closed
Project:	MariaDB Server
Component/s:	None
Affects Version/s:	None
Fix Version/s:	5.5.27

[MDEV-335] Valgrind warning "Invalid read of size 8" in lock_rec_validate_page on DML flow Created: 2012-06-13 Updated: 2012-08-28 Resolved: 2012-08-28