If attach three and over kumo-servers, segment fault occurred at the attating kumo-servers.
Because it is necessary to perform replication to three (NUM_REPLICATION+1) sets of the existing kumo-servers when replication is completed only by the attatting kumo-servers.
If attach three and over kumo-servers, segment fault occurred at the attating kumo-servers. Because it is necessary to perform replication to three (NUM_REPLICATION+1) sets of the existing kumo-servers when replication is completed only by the attatting kumo-servers.