@Override // DatanodeProtocol
public DatanodeRegistration registerDatanode(DatanodeRegistration nodeReg) throws IOException {
verifyLayoutVersion(nodeReg.getVersion());
verifySoftwareVersion(nodeReg);
namesystem.registerDatanode(nodeReg);
return nodeReg;
}
@Override // NamenodeProtocol
public NamenodeRegistration register(NamenodeRegistration registration) throws IOException {
verifyLayoutVersion(registration.getVersion());
NamenodeRegistration myRegistration = nn.setRegistration();
namesystem.registerBackupNode(registration, myRegistration);
return myRegistration;
}
/**
* Verifies the given registration.
*
* @param nodeReg node registration
* @throws UnregisteredNodeException if the registration is invalid
*/
void verifyRequest(NodeRegistration nodeReg) throws IOException {
verifyLayoutVersion(nodeReg.getVersion());
if (!namesystem.getRegistrationID().equals(nodeReg.getRegistrationID())) {
LOG.warn(
"Invalid registrationID - expected: "
+ namesystem.getRegistrationID()
+ " received: "
+ nodeReg.getRegistrationID());
throw new UnregisteredNodeException(nodeReg);
}
}