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https://issues.jboss.org/browse/AS7-5359?page=com.atlassian.jira.plugin.s...
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Brian Stansberry commented on AS7-5359:
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AFAICT in the absence of -Djava.net.preferIPv4Stack=true there is no way to tell the VM to
bind a socket to all IPv4 addresses, but only to IPv4 addresses.
So, all we can is check when we see this <any-ipv4-address/> and fail if we
don't see -Djava.net.preferIPv4Stack=true.
But, testing on Windows shows that this problem doesn't exist there, which makes my
proposed fix problematic; i.e. rejecting <any-ipv4-address/> without a corresponding
-Djava.net.preferIPv4Stack=true would break things on Windows.
The <any-ipv4-address/> and <any-ipv6-address/> config elements basically
don't have any value, since in the end the behavior we'll support will be what
<any-address/> plus the -Djava.net.preferIPv4Stack specifies. So those elements will
likely be removed in AS 8.
CLONE - Config XML with <interface ...><any-ipv4-address
/></interface> + -Djava.net.preferIPv4Stack=false produces binding to ANY address
(error)
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Key: AS7-5359
URL:
https://issues.jboss.org/browse/AS7-5359
Project: Application Server 7
Issue Type: Bug
Components: Domain Management
Affects Versions: 7.1.2.Final (EAP)
Reporter: Pavel Janousek
Assignee: Brian Stansberry
Fix For: 7.2.0.Alpha1
The same situation is with every shipped and supported configuration/profile. As base for
my explanation I'm using standalone.xml. Standalone.xml declares xmlns as:
{code}
<server xmlns="urn:jboss:domain:1.3">
{code}
The real XSD file which defined elements is
jboss-eap-6.0/docs/schema/jboss-as-config_1_3.xsd.
The very common Linux system has implemented and enabled dualstack in these days. If we
instruct AS instance to bind to +any+ IPv4 address via {code}<interface
name="public">
<any-ipv4-address />
</interface>{code}
The real result is to bind running AS instance to +any+ IP address, not only in IPv4
address space but in IPv6 too!
With default setting (= -Djava.net.preferIPv4Stack=true), result is correct - it is bound
to ANY IPv4 addresses only.
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