Performance Schema NDB Cluster Tables The  ndb_sync_excluded_objects  table has these columns: Possible reasons include the following: 5021 • Failed to get object from DD • Failed to migrate table with extra metadata version 1 • Failed to get extra metadata of table • Failed to set database name of NDB object • Failed to invalidate table references • Failed to determine if object was a local table • Failed to create schema • Failed to get datafiles assigned to tablespace • Failed to install object in DD • Failed to get object id and version • Failed to get undofiles assigned to logfile group • Failed to drop object in DD • Failed to determine if object existed in DD • Failed to determine if object existed in NDB • Injected failure • REASON : The reason for exclusion (blocklisting) of the object; that is, the reason for the failure to synchronize this object • TYPE : The type of the object has failed to synchronize; this is one of  LOGFILE GROUP ,  TABLESPACE , SCHEMA , or  TABLE • NAME : The name of the object which has failed to synchronize; this is  NULL  if the object is a schema • SCHEMA_NAME : The name of the schema (database) in which the object which has failed to synchronize resides; this is  NULL  for tablespaces and log file groups REASON: Injected failure *************************** 4. row *************************** SCHEMA_NAME: test NAME: t1 TYPE: TABLE REASON: Injected failure *************************** 5. row *************************** SCHEMA_NAME: test NAME: t2 TYPE: TABLE REASON: Injected failure *************************** 6. row *************************** SCHEMA_NAME: test NAME: t3 TYPE: TABLE REASON: Injected failure