Valgrind warning from hp_clear_dataspace/hp_free_level

[Philip Stoev]

The DDL RQG workload produced the following valgrind warning:

==8706== Address 0x18c853b8 is 504 bytes inside a block of size 127,920 free'd
==8706== at 0x4A04D72: free (vg_replace_malloc.c:325)
==8706== by 0x8D360A: my_free (my_malloc.c:128)
==8706== by 0x969855: hp_free_level (hp_block.c:146)
==8706== by 0x966F62: hp_clear_dataspace (hp_dspace.c:171)
==8706== by 0x9698BF: hp_clear (hp_clear.c:33)
==8706== by 0x96B2DC: hp_free (hp_create.c:478)
==8706== by 0x96B146: heap_try_free (hp_create.c:437)
==8706== by 0x96B1B8: heap_delete_table (hp_create.c:452)
==8706== by 0x961075: ha_heap::delete_table(char const*) (ha_heap.cc:610)
==8706== by 0x76642F: handler::ha_delete_table(char const*) (handler.cc:3421)
==8706== by 0x763A26: ha_delete_table(THD*, handlerton*, char const*, char const*, char const*, bool) (handler.cc:2039)
==8706== by 0x678F1C: quick_rm_table(handlerton*, char const*, char const*, unsigned int) (sql_table.cc:2397)
==8706== by 0x6847D3: mysql_alter_table(THD*, char*, char*, st_ha_create_information*, TABLE_LIST*, Alter_info*, unsigned int, st_order*, bool) (sql_table.cc:6647)
==8706== by 0x8ADAC2: Alter_table_statement::execute(THD*) (sql_alter.cc:106)
==8706== by 0x5FC1F3: mysql_execute_command(THD*) (sql_parse.cc:4307)
==8706== by 0x5FED7A: mysql_parse(THD*, char*, unsigned int, Parser_state*) (sql_parse.cc:5503)

[Laurynas Biveinis (laurynas-biveinis)]

The valgrind log looks incomplete, i.e. it only has the second half where it says what the failing address is close to, but does not have the first half, which points to the failing operation itself.

[Laurynas Biveinis (laurynas-biveinis)]

Philip, what is the status of this?

[Philip Stoev (pstoev-askmonty)]

This was only seen once and never again. You can close this bug if you want, I will reopen it if I get a test case.