Ivo Studensky created WFCORE-4740:
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Summary: (7.3.0) preferIPv6Addresses and preferIPv4Stack System Properties
are Mishandled in the Config
Key: WFCORE-4740
URL:
https://issues.jboss.org/browse/WFCORE-4740
Project: WildFly Core
Issue Type: Bug
Components: Server
Affects Versions: 10.0.0.Final
Environment: * JBoss EAP 7.1/7.2
* Interface attached to port 0.0.0.0
* Red Hat Enterprise Linux 7
* IPv6 disabled in the kernel
sysctl -w net.ipv6.conf.all.disable_ipv6=1
sysctl -w net.ipv6.conf.default.disable_ipv6=1
* System properties -Djava.net.preferIPv4Stack=false -Djava.net.preferIPv6Addresses=true
Reporter: Ivo Studensky
Assignee: Teresa Miyar Gil
Fix For: 11.0.0.Beta1
Error is thrown on startup.
Caused by: java.net.SocketException: Protocol family unavailable
at sun.nio.ch.Net.bind0(Native Method)
at sun.nio.ch.Net.bind(Net.java:433)
at sun.nio.ch.Net.bind(Net.java:425)
at sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:223)
at sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:74)
at org.xnio.nio.NioXnioWorker.createTcpConnectionServer(NioXnioWorker.java:179)
at org.xnio.XnioWorker.createStreamConnectionServer(XnioWorker.java:310)
at
io.undertow.protocols.ssl.UndertowXnioSsl.createSslConnectionServer(UndertowXnioSsl.java:301)
at
org.wildfly.extension.undertow.HttpsListenerService.startListening(HttpsListenerService.java:127)
The customer ships a turn key solution that has the two system properties set:
-Djava.net.preferIPv4Stack=false -Djava.net.preferIPv6Addresses=true because they are
needed for some cases for customers running IPv6, but others want to harden their systems
by disabling IPv4.
This works on JBoss EAP 6, but it throws the error on JBoss EAP 7 on the same version of
Java. Furthermore, adding just Djava.net.preferIPv4Stack=false has the same issue, even
though it the default value, while leaving it off starts.
This appears to be related to
controller/src/main/java/org/jboss/as/controller/interfaces/OverallInterfaceCriteria.java#pruneIPTypes
where if both properties are null, it leaves the set of candidate addresses alone, but it
either are set, it strips out all IPv4 addresses.
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