Hi Paulo,

There you go https://issues.apache.org/jira/browse/CASSANDRA-12631
Tell me if there is more info I can provide/test fix.
I wonder how the original CASSANDRA-9748 get closed?
I also try the setup on 2.2.5 which is one of the fix versions without success. 
Did this setup ever work?

Thanks,
Amir

From: Paulo Motta [mailto:pauloricard...@gmail.com]
Sent: Monday, September 12, 2016 16:23
To: user@cassandra.apache.org
Subject: Re: Multiple Network Interfaces in non-EC2

This seems like a bug, it seems we always bind the outgoing socket to the 
private/listen address. Would you mind opening a JIRA and posting the link here?
Thanks

2016-09-12 3:35 GMT-03:00 Amir Dafny-Man 
<a.dafny...@f5.com<mailto:a.dafny...@f5.com>>:
Hi,

I followed the docs 
(http://docs.datastax.com/en/cassandra/3.x/cassandra/configuration/configMultiNetworks.html)
 and I am familiar with https://issues.apache.org/jira/browse/CASSANDRA-9748.
Trying to establish a single 2 nodes, single DC setup. I tried Cassandra 3.7 
but also 2.2.7.
My setup:
RHEL6 distribution
Node1 external: 10.240.33.241
Node1 internal: 192.168.33.241
Node2 external: 10.240.33.244
Node2 internal: 192.168.33.244

cassandra-rackdc.properties (for both nodes) also tried with prefer_local=false:
dc=vdra015-xs-15
rack=rack1
prefer_local=true

Cassandra.yaml (changes over default):
seeds: “10.240.33.241”
listen_address: 192.168.33.241 or 192.168.33.244
broadcast_address: 10.240.33.241 or 10.240.33.244
listen_on_broadcast_address: true
rpc_address: 192.168.33.241 or 192.168.33.244
endpoint_snitch: GossipingPropertyFileSnitch

Routing table:
# ip r
192.168.33.0/24<http://192.168.33.0/24> dev eth1  proto kernel  scope link  src 
192.168.33.241
10.1.21.0/24<http://10.1.21.0/24> dev eth2  proto kernel  scope link  src 
10.1.21.241
10.1.22.0/24<http://10.1.22.0/24> dev eth3  proto kernel  scope link  src 
10.1.22.241
10.1.23.0/24<http://10.1.23.0/24> dev eth4  proto kernel  scope link  src 
10.1.23.241
10.240.32.0/21<http://10.240.32.0/21> dev eth0  proto kernel  scope link  src 
10.240.33.241
default via 10.240.32.1 dev eth0

Experienced behavior:

1.       Node1 starts up normally
# netstat -anlp|grep java
tcp        0      0 127.0.0.1:55452<http://127.0.0.1:55452>             
0.0.0.0:*                   LISTEN      10036/java
tcp        0      0 127.0.0.1:7199<http://127.0.0.1:7199>              
0.0.0.0:*                   LISTEN      10036/java
tcp        0      0 10.240.33.241:7000<http://10.240.33.241:7000>          
0.0.0.0:*                   LISTEN      10036/java
tcp        0      0 192.168.33.241:7000<http://192.168.33.241:7000>         
0.0.0.0:*                   LISTEN      10036/java
tcp        0      0 ::ffff:192.168.33.241:9042<http://192.168.33.241:9042>  
:::*                        LISTEN      10036/java

2.       When I try to start node2, it is unable to connect to node1 IP set in 
seeds
Exception (java.lang.RuntimeException) encountered during startup: Unable to 
gossip with any seeds
java.lang.RuntimeException: Unable to gossip with any seeds

3.       Running tcpdumpon node2, I can see that node2 is trying to connect to 
node1 external IP but with its source internal IP
# tcpdump -nn -i eth0 port 7000
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on eth0, link-type EN10MB (Ethernet), capture size 65535 bytes
09:29:05.239026 IP 192.168.33.244.52900 > 10.240.33.241.7000: Flags [S], seq 
77957108, win 14600, options [mss 1460,sackOK,TS val 65015480 ecr 0,nop,wscale 
9], length 0
09:29:06.238188 IP 192.168.33.244.52900 > 10.240.33.241.7000: Flags [S], seq 
77957108, win 14600, options [mss 1460,sackOK,TS val 65016480 ecr 0,nop,wscale 
9], length 0
09:29:08.238159 IP 192.168.33.244.52900 > 10.240.33.241.7000: Flags [S], seq 
77957108, win 14600, options [mss 1460,sackOK,TS val 65018480 ecr 0,nop,wscale 
9], length 0
09:29:12.238129 IP 192.168.33.244.52900 > 10.240.33.241.7000: Flags [S], seq 
77957108, win 14600, options [mss 1460,sackOK,TS val 65022480 ecr 0,nop,wscale 
9], length 0
09:29:20.238129 IP 192.168.33.244.52900 > 10.240.33.241.7000: Flags [S], seq 
77957108, win 14600, options [mss 1460,sackOK,TS val 65030480 ecr 0,nop,wscale 
9], length 0
09:29:36.238161 IP 192.168.33.244.52900 > 10.240.33.241.7000: Flags [S], seq 
77957108, win 14600, options [mss 1460,sackOK,TS val 65046480 ecr 0,nop,wscale 
9], length 0

4.       Running tcpdump on node1, shows packets are not arriving

Is something configured wrong or is this a bug?

Thanks,
Amir


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