@Override
  protected void serializeStateData(ProcedureStateSerializer serializer) throws IOException {
    super.serializeStateData(serializer);
    serializer.serialize(InitMetaStateData.getDefaultInstance());
  }
This procedure is used to initialize meta table for a new hbase deploy. It will just schedule an
{@link TransitRegionStateProcedure} to assign meta.
hbase-server/src/main/java/org/apache/hadoop/hbase/master/procedure/InitMetaProcedure.java