diff options
Diffstat (limited to 'innobase/dict/dict0dict.c')
| -rw-r--r-- | innobase/dict/dict0dict.c | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/innobase/dict/dict0dict.c b/innobase/dict/dict0dict.c index b8d9f362b06..b0d95597153 100644 --- a/innobase/dict/dict0dict.c +++ b/innobase/dict/dict0dict.c @@ -1556,6 +1556,8 @@ dict_index_remove_from_cache( dict_field_t* field; ulint size; ulint i; + ulint retries = 0; + btr_search_t* info; ut_ad(table && index); ut_ad(table->magic_n == DICT_TABLE_MAGIC_N); @@ -1564,6 +1566,51 @@ dict_index_remove_from_cache( ut_ad(mutex_own(&(dict_sys->mutex))); #endif /* UNIV_SYNC_DEBUG */ + /* We always create search info whether or not adaptive + hash index is enabled or not. */ + info = index->search_info; + ut_ad(info); + + /* We are not allowed to free the in-memory index struct + dict_index_t until all entries in the adaptive hash index + that point to any of the page belonging to his b-tree index + are dropped. This is so because dropping of these entries + require access to dict_index_t struct. To avoid such scenario + We keep a count of number of such pages in the search_info and + only free the dict_index_t struct when this count drops to + zero. */ + + for (;;) { + ulint ref_count = btr_search_info_get_ref_count(info); + if (ref_count == 0) { + break; + } + + /* Sleep for 10ms before trying again. */ + os_thread_sleep(10000); + ++retries; + + if (retries % 500 == 0) { + /* No luck after 5 seconds of wait. */ + fprintf(stderr, "InnoDB: Error: Waited for" + " %lu secs for hash index" + " ref_count (%lu) to drop" + " to 0.\n" + "index: \"%s\"" + " table: \"%s\"\n", + retries/100, + ref_count, + index->name, + table->name); + } + + /* To avoid a hang here we commit suicide if the + ref_count doesn't drop to zero in 600 seconds. */ + if (retries >= 60000) { + ut_error; + } + } + ut_ad(UT_LIST_GET_LEN((index->tree)->tree_indexes) == 1); dict_tree_free(index->tree); |