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From "Andrey Trubachev (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (CASSANDRA-9137) nodetool doesn't work when Cassandra run with the property java.net.preferIPv6Addresses=true
Date Thu, 09 Apr 2015 06:26:12 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-9137?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14486814#comment-14486814
] 

Andrey Trubachev edited comment on CASSANDRA-9137 at 4/9/15 6:25 AM:
---------------------------------------------------------------------

I've made extra checks
{code}
String localhostIP = InetAddress.getLoopbackAddress().getHostAddress();
System.out.println(localhostIP);
{code}
and this code returns {{127.0.0.1}} or {{0:0:0:0:0:0:0:1}} when {{java.net.preferIPv6Addresses}}
is {{true}}.
Unfortunately, I'm not experienced enough in Java to explain it more detailed.


was (Author: d3rp):
I've made extra checks
{code}
String localhostIP = InetAddress.getLoopbackAddress().getHostAddress();
System.out.println(localhostIP);
{code}
and this code returns {{127.0.0.1}} or {{0:0:0:0:0:0:0:1}} then {{java.net.preferIPv6Addresses}}
is {{true}}.
Unfortunately, I'm not experienced enough in Java to explain it more detailed.

> nodetool doesn't work when Cassandra run with the property java.net.preferIPv6Addresses=true
> --------------------------------------------------------------------------------------------
>
>                 Key: CASSANDRA-9137
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-9137
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Core
>            Reporter: Andrey Trubachev
>             Fix For: 2.0.15, 2.1.5
>
>         Attachments: cassandra-2.0.14-9137.txt, cassandra-2.1.4-9137.txt
>
>
> nodetool doesn't work when Cassandra run with the property {{java.net.preferIPv6Addresses=true}}.
> {noformat}
> $ sudo netstat -tlpn | grep $(cat /var/run/cassandra/cassandra.pid) | grep 7199
> tcp6       0      0 ::1:7199                :::*                    LISTEN      27560/java
> {noformat}
> {noformat}
> $ nodetool -h ::1 status
> nodetool: Failed to connect to '::1:7199' - ConnectException: 'Connection refused'.
> {noformat}
> Hardcoded value  of the property {{java.rmi.server.hostname}} (https://github.com/apache/cassandra/blob/cassandra-2.1.4/src/java/org/apache/cassandra/service/CassandraDaemon.java#L91)
makes RMI returns the address {{127.0.0.1}} instead of {{::1}} that jmxServer listens to.
> {noformat}
> 21:52:26.300192 IP6 (hlim 64, next-header TCP (6) payload length: 259) ::1.7199 >
::1.58706: Flags [P.], cksum 0x010b (incorrect -> 0x6a57), seq 23:250, ack 88, win 2048,
options [nop,nop,TS val 1833457 ecr 1833456], length 227
> `......@...................................R.4...../...........
> ........Q....w..SZ.y...L.[....sr..javax.management.remote.rmi.RMIServerImpl_Stub...........pxr..java.rmi.server.RemoteStub......e....pxr..javSZ.y...L.[.....xoteObject.a...a3....pxpw4..UnicastRef2..
127.0.0.1...(.L....d
> 21:52:26.336400 IP6 (hlim 64, next-header TCP (6) payload length: 32) ::1.58706 >
::1.7199: Flags [.], cksum 0x0028 (incorrect -> 0xfe1c), seq 88, ack 250, win 2048, options
[nop,nop,TS val 1833467 ecr 1833457], length 0
> `.... .@.................................R...../.4.......(.....
> ........
> {noformat}
> jmxServer listens to the an ip address that was resolved from {{localhost}} and it depends
on value of the property {{java.net.preferIPv6Addresses}} or lack of it (
> https://github.com/apache/cassandra/blob/trunk/src/java/org/apache/cassandra/utils/RMIServerSocketFactoryImpl.java#L13).
> This is a simple patch that works correctly with {{java.net.preferIPv6Addresses=(true|false)}}
and {{java.net.preferIPv4Stack=(true|false)}}:
> {code}
> diff --git a/src/java/org/apache/cassandra/service/CassandraDaemon.java b/src/java/org/apache/cassandra/service/CassandraDaemon.java
> index 3e398bf..66e9cca 100644
> --- a/src/java/org/apache/cassandra/service/CassandraDaemon.java
> +++ b/src/java/org/apache/cassandra/service/CassandraDaemon.java
> @@ -88,7 +88,7 @@ public class CassandraDaemon
>              }
>              else
>              {
> -                System.setProperty("java.rmi.server.hostname","127.0.0.1");
> +                System.setProperty("java.rmi.server.hostname", InetAddress.getLoopbackAddress().getHostAddress());
>                  try
>                  {
> {code}



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