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Don't print lots of noise on IPv4 only hosts. 

If the machine doesn't support IPv6, or if the user disabled it
with -Djava.net.preferIPv4Stack, or if the user disabled it with
ES_USE_IPV4, we will still try to bind a socket to ::1 out of box,
and we will see lots of exceptions logged to the console.

It is harmless noise but not a great experience.
This commit is contained in:
Robert Muir 2015-08-20 17:05:30 -04:00
parent e2ab62596f
commit 5beabdd0ec
2 changed files with 32 additions and 2 deletions
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25
core/src/main/java/org/elasticsearch/common/network/NetworkUtils.java
View File

@ -52,6 +52,31 @@ public abstract class NetworkUtils {
*/
@Deprecated
static final boolean PREFER_V6 = Boolean.parseBoolean(System.getProperty("java.net.preferIPv6Addresses", "false"));
/**
* True if we can bind to a v6 address. Its silly, but for *binding* we have a need to know
* if the stack works. this can prevent scary noise on IPv4-only hosts.
* @deprecated transition mechanism only, do not use
*/
@Deprecated
public static final boolean SUPPORTS_V6;
static {
boolean v = false;
try {
for (NetworkInterface nic : getInterfaces()) {
for (InetAddress address : Collections.list(nic.getInetAddresses())) {
if (address instanceof Inet6Address) {
v = true;
break;
}
}
}
} catch (SecurityException | SocketException misconfiguration) {
v = true; // be optimistic, you misconfigure, then you get noise to your screen
}
SUPPORTS_V6 = v;
}
/** Sorts an address by preference. This way code like publishing can just pick the first one */
static int sortKey(InetAddress address, boolean prefer_v6) {

9
core/src/main/java/org/elasticsearch/transport/netty/NettyTransport.java
View File

@ -122,7 +122,6 @@ public class NettyTransport extends AbstractLifecycleComponent<Transport> implem
public static final String DEFAULT_PORT_RANGE = "9300-9400";
public static final String DEFAULT_PROFILE = "default";
private static final List<String> LOCAL_ADDRESSES = Arrays.asList("127.0.0.1", "[::1]");
protected final NetworkService networkService;
protected final Version version;
@ -714,7 +713,13 @@ public class NettyTransport extends AbstractLifecycleComponent<Transport> implem
@Override
public List<String> getLocalAddresses() {
return LOCAL_ADDRESSES;
List<String> local = new ArrayList<>();
local.add("127.0.0.1");
// check if v6 is supported, if so, v4 will also work via mapped addresses.
if (NetworkUtils.SUPPORTS_V6) {
local.add("::1");
}
return local;
}
@Override