zjffdu commented on a change in pull request #3364: [ZEPPELIN-4155] Unable get
available HostAddress in multi-NIC environment
URL: https://github.com/apache/zeppelin/pull/3364#discussion_r284523426
##########
File path:
zeppelin-interpreter/src/main/java/org/apache/zeppelin/interpreter/remote/RemoteInterpreterUtils.java
##########
@@ -93,22 +97,53 @@ public static TServerSocket createTServerSocket(String
portRange)
throw new IOException("No available port in the portRange: " + portRange);
}
+ // 1) Multiple NetworkCard will be configured on some servers
+ // 2) In the docker container environment, A container will also generate
multiple virtual NetworkCard
public static String findAvailableHostAddress() throws UnknownHostException,
SocketException {
- InetAddress address = InetAddress.getLocalHost();
- if (address.isLoopbackAddress()) {
- for (NetworkInterface networkInterface : Collections
- .list(NetworkInterface.getNetworkInterfaces())) {
- if (!networkInterface.isLoopback()) {
- for (InterfaceAddress interfaceAddress :
networkInterface.getInterfaceAddresses()) {
- InetAddress a = interfaceAddress.getAddress();
- if (a instanceof Inet4Address) {
- return a.getHostAddress();
- }
+ List<NetworkInterface> netlist = new ArrayList<NetworkInterface>();
+
+ // Get all the network cards in the current environment
+ Enumeration<?> netInterfaces = NetworkInterface.getNetworkInterfaces();
+ while (netInterfaces.hasMoreElements()) {
+ NetworkInterface networkInterface =
(NetworkInterface)netInterfaces.nextElement();
+ LOGGER.info("networkInterface = " + networkInterface.toString());
+ if (networkInterface.isLoopback()) {
+ // Filter lo network card
+ continue;
+ }
+ // When all the network cards are obtained by the above method,
+ // The order obtained is the reverse of the order of the NICs
+ // seen in the server with the ifconfig command.
+ // Therefore, when you want to traverse from the first NIC,
+ // Need to reverse the elements in Enumeration<?>
+ netlist.add(0, networkInterface);
+ }
+
+ for (NetworkInterface list:netlist) {
+ Enumeration<?> enumInetAddress = list.getInetAddresses();
+
+ while (enumInetAddress.hasMoreElements()) {
+ InetAddress ip = (InetAddress) enumInetAddress.nextElement();
+ LOGGER.info("ip = " + ip.toString());
Review comment:
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