These thread states occur on a replica server but are associated with connection threads, not with the I/O or SQL threads.
The thread is processing a
CHANGE REPLICATION SOURCE TOstatement.The thread is processing a
STOP REPLICAstatement.This state occurs after
Creating table from master dump.Reading master dump table dataThis state occurs after
Opening master dump table.Rebuilding the index on master dump tableThis state occurs after
Reading master dump table data.