MDEV-14614 InnoDB: Failing assertion: trx->error_state == DB_SUCCESS or lock...

MDEV-14614 InnoDB: Failing assertion: trx->error_state == DB_SUCCESS or lock wait timeout upon saving statistics

The assertion failure was caused by
MDEV-14511 Use fewer transactions for updating InnoDB persistent statistics

We are reusing a transaction object after commit, and sometimes,
even after a successful operation, the trx_t::error_state may be
something else than DB_SUCCESS. Reset the field when needed.

storage/innobase/btr/btr0defragment.cc

@@ -831,6 +831,7 @@ DECLARE_THREAD(btr_defragment_thread)(void*)
 			mtr_commit(&mtr);
 			/* Reaching the end of the index. */
 			dict_stats_empty_defrag_stats(index);
+			trx->error_state = DB_SUCCESS;
 			ut_d(trx->persistent_stats = true);
 			++trx->will_lock;
 			dberr_t err = dict_stats_save_defrag_stats(index, trx);

storage/innobase/dict/dict0defrag_bg.cc

@@ -213,6 +213,7 @@ dict_stats_process_entry_from_defrag_pool(trx_t* trx)
 	index_id_t	index_id;
 
 	ut_ad(!srv_read_only_mode);
+	ut_ad(trx->persistent_stats);
 
 	/* pop the first index from the auto defrag pool */
 	if (!dict_stats_defrag_pool_get(&table_id, &index_id)) {
@@ -242,6 +243,7 @@ dict_stats_process_entry_from_defrag_pool(trx_t* trx)
 	}
 
 	mutex_exit(&dict_sys->mutex);
+	trx->error_state = DB_SUCCESS;
 	++trx->will_lock;
 	dberr_t err = dict_stats_save_defrag_stats(index, trx);
 
@@ -275,6 +277,8 @@ dict_defrag_process_entries_from_defrag_pool(trx_t* trx)
 dberr_t
 dict_stats_save_defrag_summary(dict_index_t* index, trx_t* trx)
 {
+	ut_ad(trx->persistent_stats);
+
 	if (dict_index_is_ibuf(index)) {
 		return DB_SUCCESS;
 	}
@@ -294,6 +298,9 @@ dict_stats_save_defrag_summary(dict_index_t* index, trx_t* trx)
 dberr_t
 dict_stats_save_defrag_stats(dict_index_t* index, trx_t* trx)
 {
+	ut_ad(trx->error_state == DB_SUCCESS);
+	ut_ad(trx->persistent_stats);
+
 	if (dict_index_is_ibuf(index)) {
 		return DB_SUCCESS;
 	}

storage/innobase/dict/dict0stats_bg.cc

@@ -378,6 +378,7 @@ dict_stats_process_entry_from_recalc_pool(trx_t* trx)
 		dict_stats_recalc_pool_add(table);
 
 	} else {
+		trx->error_state = DB_SUCCESS;
 		++trx->will_lock;
 		dict_stats_update(table, DICT_STATS_RECALC_PERSISTENT, trx);
 		if (trx->state != TRX_STATE_NOT_STARTED) {

storage/innobase/handler/ha_innodb.cc

@@ -6480,6 +6480,7 @@ ha_innobase::open(const char* name, int, uint)
 		}
 		ut_ad(!trx->persistent_stats);
 		ut_d(trx->persistent_stats = true);
+		trx->error_state = DB_SUCCESS;
 		++trx->will_lock;
 		dict_stats_init(ib_table, trx);
 		innobase_commit_low(trx);
@@ -13281,6 +13282,7 @@ create_table_info_t::create_table_update_dict()
 	innobase_copy_frm_flags_from_create_info(innobase_table, m_create_info);
 
 	++m_trx->will_lock;
+	m_trx->error_state = DB_SUCCESS;
 	dict_stats_update(innobase_table, DICT_STATS_EMPTY_TABLE, m_trx);
 	innobase_commit_low(m_trx);
 
@@ -14045,6 +14047,7 @@ ha_innobase::rename_table(
 		normalize_table_name(norm_from, from);
 		normalize_table_name(norm_to, to);
 
+		trx->error_state = DB_SUCCESS;
 		++trx->will_lock;
 		ret = dict_stats_rename_table(norm_from, norm_to,
 					      errstr, sizeof errstr, trx);

storage/innobase/handler/handler0alter.cc

@@ -9073,6 +9073,7 @@ ha_innobase::commit_inplace_alter_table(
 	}
 
 	row_mysql_unlock_data_dictionary(trx);
+	trx->error_state = DB_SUCCESS;
 	++trx->will_lock;
 
 	/* TODO: The following code could be executed