@Override // DatanodeProtocol
public DatanodeRegistration registerDatanode(DatanodeRegistration nodeReg) throws IOException {
verifyVersion(nodeReg.getVersion());
namesystem.registerDatanode(nodeReg);
return nodeReg;
}
@Override // NamenodeProtocol
public NamenodeRegistration register(NamenodeRegistration registration) throws IOException {
verifyVersion(registration.getVersion());
NamenodeRegistration myRegistration = nn.setRegistration();
namesystem.registerBackupNode(registration, myRegistration);
return myRegistration;
}
/**
* Verify request.
*
* <p>Verifies correctness of the datanode version, registration ID, and if the datanode does not
* need to be shutdown.
*
* @param nodeReg data node registration
* @throws IOException
*/
void verifyRequest(NodeRegistration nodeReg) throws IOException {
verifyVersion(nodeReg.getVersion());
if (!namesystem.getRegistrationID().equals(nodeReg.getRegistrationID())) {
LOG.warn(
"Invalid registrationID - expected: "
+ namesystem.getRegistrationID()
+ " received: "
+ nodeReg.getRegistrationID());
throw new UnregisteredNodeException(nodeReg);
}
}