liubao68 commented on a change in pull request #1825:
URL:
https://github.com/apache/servicecomb-java-chassis/pull/1825#discussion_r437823717
##########
File path:
service-registry/registry-zero-config/src/main/java/org/apache/servicecomb/zeroconfig/server/ServerUtil.java
##########
@@ -179,12 +179,12 @@ private static ServerMicroserviceInstance
buildServerMicroserviceInstanceFromMap
private static void startListenerForRegisterUnregisterEvent() {
try {
- byte[] buffer = new byte[DATA_PACKET_BUFFER_SIZE];
multicastSocket = new MulticastSocket(PORT);
group = InetAddress.getByName(GROUP);
multicastSocket.joinGroup(group); // need to join the group to be able
to receive the data
while (true) {
+ byte[] buffer = new byte[DATA_PACKET_BUFFER_SIZE];
DatagramPacket receivePacketBuffer = new DatagramPacket(buffer,
buffer.length);
multicastSocket.receive(receivePacketBuffer);
String receivedPacketString = new
String(receivePacketBuffer.getData(), ENCODE);
Review comment:
Maybe you misunderstanding my point. You should do this
```
multicastSocket.receive(receivePacketBuffer);
int len = multicastSocket.getLength() ;
if(len > 0) {
String receivedPacketString = new String(receivePacketBuffer.getData(),
0, len, ENCODE);
}
```
And you can avoid creating new buffers for each receive, though this is not
very important because the next receive happens in seconds.
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