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From "Jonathan Ellis (JIRA)" <j...@apache.org>
Subject [jira] Commented: (CASSANDRA-628) java.net.SocketException: Invalid argument / java.net.NoRouteToHostException: Network is unreachable
Date Sat, 22 May 2010 17:10:17 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-628?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12870311#action_12870311
] 

Jonathan Ellis commented on CASSANDRA-628:
------------------------------------------

Should we apply the "quick fix" for now?

> 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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