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https://issues.apache.org/jira/browse/CASSANDRA-628?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12870349#action_12870349
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Eric Evans commented on CASSANDRA-628:
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We've at least one user who uses IPv6, and as far as I know, I'm the only one
that has run into this particular problem; I think that setting
-Djava.net.preferIPv4Stack=true would be optimizing for the wrong case.
Also, this problem and the workarounds for it are pretty well known at this
point, so it's possible that it isn't much of an issue because folks who run
Java are already setting IPV6_V6ONLY=0.
I mostly submitted this to document.
> java.net.SocketException: Invalid argument / java.net.NoRouteToHostException:
> Network is unreachable
> ----------------------------------------------------------------------------------------------------
>
> Key: CASSANDRA-628
> URL: https://issues.apache.org/jira/browse/CASSANDRA-628
> Project: Cassandra
> Issue Type: Bug
> Components: Core
> Environment: Linux, FreeBSD, (possibly others)
> Reporter: Eric Evans
>
> This manifests as either a SocketException that occurs when starting a
> cassandra node, or a NoRouteToHostException which occurs when connecting with
> a client.
> On Linux systems this is caused by IPV6_V6ONLY being set true. The docs
> (ipv6(7)) say that when set this causes sockets to be created IPv6 only,
> while the previous behavior also allowed sending and receiving packets using
> an IPv4-mapped IPv6 address.
> The quick fix is to either launch applications using the
> -Djava.net.preferIPv4Stack=true property, or on Linux systems set
> net.ipv6.bindv6only=0 (see sysctl(8)).
> My limited understanding is that the previous behavior (IPV6_V6ONLY=0) was
> always considered a hack to be used until IPv6 was more mature/had gained
> traction and that a change in defaults was always inevitable, so in the
> long-term a Real Fix will be needed.
> http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6342561
> http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=560056
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