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From "Hudson (JIRA)" <>
Subject [jira] Commented: (CASSANDRA-628) Invalid argument / Network is unreachable
Date Sat, 30 Oct 2010 12:50:20 GMT


Hudson commented on CASSANDRA-628:

Integrated in Cassandra #581 (See [])
    document CASSANDRA-628 change (prefer IPv4)

Patch by eevans
make default

Patch by eevans for CASSANDRA-628

> Invalid argument / Network
is unreachable
> ----------------------------------------------------------------------------------------------------
>                 Key: CASSANDRA-628
>                 URL:
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Core
>    Affects Versions: 0.6.6, 0.7 beta 3
>         Environment: Linux, FreeBSD, (possibly others)
>            Reporter: Eric Evans
>            Assignee: Eric Evans
>             Fix For: 0.7.0
> 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
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.

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