private JoinMessage receive() {
try {
try {
multicastSocket.receive(datagramPacketReceive);
} catch (IOException ignore) {
return null;
}
try {
final byte[] data = datagramPacketReceive.getData();
final int offset = datagramPacketReceive.getOffset();
final BufferObjectDataInput input =
node.getSerializationService().createObjectDataInput(data);
input.position(offset);
final byte packetVersion = input.readByte();
if (packetVersion != Packet.VERSION) {
logger.warning(
"Received a JoinRequest with a different packet version! This -> "
+ Packet.VERSION
+ ", Incoming -> "
+ packetVersion
+ ", Sender -> "
+ datagramPacketReceive.getAddress());
return null;
}
try {
return input.readObject();
} finally {
input.close();
}
} catch (Exception e) {
if (e instanceof EOFException || e instanceof HazelcastSerializationException) {
logger.warning(
"Received data format is invalid."
+ " (An old version of Hazelcast may be running here.)",
e);
} else {
throw e;
}
}
} catch (Exception e) {
logger.warning(e);
}
return null;
}
public byte readByte(String fieldName) throws IOException {
int pos = readPosition(fieldName, FieldType.BYTE);
return in.readByte(pos);
}