[CBRD-25463] Update db_ha_apply_info periodically when applying logs …

…replicated from slave node (#5328) (#5498)

http://jira.cubrid.org/browse/CBRD-25463

Update db_ha_apply_info periodically even if applylogdb applies the logs replicated from slave node

Co-authored-by: Jooho Kim <[email protected]>

src/transaction/log_applier.c

@@ -6680,6 +6680,8 @@ la_check_time_commit (struct timeval *time_commit, unsigned int threshold)
   int diff_msec;
   bool need_commit = false;
 
+  static int ha_mode = -1;
+
   assert (time_commit);
 
   /* check interval time for commit */
@@ -6707,6 +6709,34 @@ la_check_time_commit (struct timeval *time_commit, unsigned int threshold)
 	  need_commit = true;
 	}
 
+      if (ha_mode < HA_MODE_OFF)
+	{
+	  ha_mode = prm_get_integer_value (PRM_ID_HA_MODE);
+	}
+
+      if (ha_mode == HA_MODE_REPLICA && la_Info.act_log.log_hdr->ha_server_state == HA_SERVER_STATE_STANDBY)
+	{
+	  /*
+	   * 'db_ha_apply_info' catalog is updated by la_log_commit, and the HA service uses the updated
+	   * information (db_ha_apply_info) to obtain delay information.
+	   * However, during the process of applying logs replicated from the standby,
+	   * the db_ha_apply_info is not updated. Therefore, it needs to be updated periodically here.
+	   *
+	   * NOTE:
+	   * 1. The logs replicated from the 'standby' server do not contain replication logs.
+	   *   - The value of la_Info.total_rows does not change.
+	   *   - Therefore, la_log_commit is not called within this function.
+	   * 2. The logs replicated from the 'standby' server do not contain LOG_DUMMY_HA_SERVER_STATE log records either.
+	   *   - la_log_commit is not called in la_log_record_process
+	   * 3. la_log_commit is called only when the logs received from the standby server are read to the end (LOG_END_OF_LOG).
+	   *   - la_log_commit is called if the logs are fully applied and checked in la_change_state
+	   *   - Due to the above condition, unnecessary duplicate la_log_commit calls may occur (legacy issue).
+	   *   - The probability of applying the end of log decreases if ha_replica_delay is set.
+	   */
+
+	  need_commit = true;
+	}
+
       if (need_commit == true || la_Info.is_apply_info_updated == true)
 	{
 	  error = la_log_commit (need_commit);