## 8.14.8 NDB Cluster Thread States 

• Killing slave 

The thread is processing a STOP REPLICA | SLAVE  statement. 

• Opening master dump table 

This state occurs after Creating table from master dump . 

• Reading master dump table data 

This state occurs after Opening master dump table . 

• Rebuilding the index on master dump table 

This state occurs after Reading master dump table data . 

• Committing events to binlog 

• Opening mysql.ndb_apply_status 

• Processing events 

The thread is processing events for binary logging. 

• Processing events from schema table 

The thread is doing the work of schema replication. 

• Shutting down 

• Syncing ndb table schema operation and binlog 

This is used to have a correct binary log of schema operations for NDB. 

• Waiting for allowed to take ndbcluster global schema lock 

The thread is waiting for permission to take a global schema lock. 

• Waiting for event from ndbcluster 

The server is acting as an SQL node in an NDB Cluster, and is connected to a cluster management node. 

• Waiting for first event from ndbcluster 

• Waiting for ndbcluster binlog update to reach current position 

• Waiting for ndbcluster global schema lock 

The thread is waiting for a global schema lock held by another thread to be released. 

## 8.14.9 Event Scheduler Thread States 

• Waiting for ndbcluster to start 

• Waiting for schema epoch 

The thread is waiting for a schema epoch (that is, a global checkpoint). 

