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Posted to users@tomcat.apache.org by Zippy Zeppoli <zi...@gmail.com> on 2013/03/08 20:42:19 UTC
tomcat7 cluster not communicating
So, I have a tomcat7 cluster on AWS with a cluster configuration that
works on my local VirtualBox cluster.
Specs:
- Same config.
- Firewall turned off on all hosts.
- unicast instead of multicast
the following commands time out:
nc -zv member1 8080
nc -zv member1 4110
They are listening however:
tcp 0 0 0.0.0.0:4110 0.0.0.0:*
LISTEN
tcp 0 0 0.0.0.0:8080 0.0.0.0:*
LISTEN
tcpdump shows over and over SYN's but no replies on all members:
18:57:23.762712 IP member1: 52548 > 192.168.10.10.g2tag: Flags [S],
seq 215397535, win 14600, options [mss 1460,sackOK,TS val 159216257
ecr 0,nop,wscale 7], length 0
Connecting to any other port from one member to another works fine,
for example ssh.
So I can't figure out why network communication works between all
hosts, tomcat is listening, but trying to connect to the listening
port fails.
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Re: tomcat7 cluster not communicating
Posted by Zippy Zeppoli <zi...@gmail.com>.
I don't think it has anything to do with EC2, but I could be wrong.
Like I said before other ports connect fine, and everything is in the
same subnet.
There's no way for a firewall to interfere as iptables is disabled.
It's a VPC with private (different IPs, you can't have duplicate IP's in EC2).
On Fri, Mar 8, 2013 at 1:22 PM, Christopher Schultz
<ch...@christopherschultz.net> wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA256
>
> Frank,
>
> On 3/8/13 2:42 PM, Zippy Zeppoli wrote:
>> So, I have a tomcat7 cluster on AWS with a cluster configuration
>> that works on my local VirtualBox cluster.
>>
>> Specs: - Same config. - Firewall turned off on all hosts. - unicast
>> instead of multicast
>>
>> the following commands time out: nc -zv member1 8080 nc -zv
>> member1 4110
>>
>> They are listening however: tcp 0 0 0.0.0.0:4110
>> 0.0.0.0:* LISTEN tcp 0 0 0.0.0.0:8080
>> 0.0.0.0:* LISTEN
>>
>> tcpdump shows over and over SYN's but no replies on all members:
>> 18:57:23.762712 IP member1: 52548 > 192.168.10.10.g2tag: Flags
>> [S], seq 215397535, win 14600, options [mss 1460,sackOK,TS val
>> 159216257 ecr 0,nop,wscale 7], length 0
>>
>>
>> Connecting to any other port from one member to another works
>> fine, for example ssh.
>>
>> So I can't figure out why network communication works between all
>> hosts, tomcat is listening, but trying to connect to the listening
>> port fails.
>
> Are you using your EC2 internal IP addresses or external PI addresses?
> When you say you have the "same config", I presume that you have
> different IP addresses configured, yes?
>
> - -chris
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> Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/
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> =xEcb
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Re: tomcat7 cluster not communicating
Posted by Christopher Schultz <ch...@christopherschultz.net>.
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256
Frank,
On 3/8/13 2:42 PM, Zippy Zeppoli wrote:
> So, I have a tomcat7 cluster on AWS with a cluster configuration
> that works on my local VirtualBox cluster.
>
> Specs: - Same config. - Firewall turned off on all hosts. - unicast
> instead of multicast
>
> the following commands time out: nc -zv member1 8080 nc -zv
> member1 4110
>
> They are listening however: tcp 0 0 0.0.0.0:4110
> 0.0.0.0:* LISTEN tcp 0 0 0.0.0.0:8080
> 0.0.0.0:* LISTEN
>
> tcpdump shows over and over SYN's but no replies on all members:
> 18:57:23.762712 IP member1: 52548 > 192.168.10.10.g2tag: Flags
> [S], seq 215397535, win 14600, options [mss 1460,sackOK,TS val
> 159216257 ecr 0,nop,wscale 7], length 0
>
>
> Connecting to any other port from one member to another works
> fine, for example ssh.
>
> So I can't figure out why network communication works between all
> hosts, tomcat is listening, but trying to connect to the listening
> port fails.
Are you using your EC2 internal IP addresses or external PI addresses?
When you say you have the "same config", I presume that you have
different IP addresses configured, yes?
- -chris
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Comment: GPGTools - http://gpgtools.org
Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/
iEYEAREIAAYFAlE6VqAACgkQ9CaO5/Lv0PC7zQCffK+OuT2bKd87ziLS3+ICL8II
GjUAoICdZSixj/MTozTEtrlpjJa8W9iw
=xEcb
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Re: tomcat7 cluster not communicating
Posted by Vince Stewart <st...@gmail.com>.
if this is a newly installed system with linux in each virtual machine,
make sure you have registered the IP address (192.168.x.x) in \etc\hosts
files.
On Sat, Mar 9, 2013 at 8:42 AM, Zippy Zeppoli <zi...@gmail.com>wrote:
> So, I have a tomcat7 cluster on AWS with a cluster configuration that
> works on my local VirtualBox cluster.
>
> Specs:
> - Same config.
> - Firewall turned off on all hosts.
> - unicast instead of multicast
>
> the following commands time out:
> nc -zv member1 8080
> nc -zv member1 4110
>
> They are listening however:
> tcp 0 0 0.0.0.0:4110 0.0.0.0:*
> LISTEN
> tcp 0 0 0.0.0.0:8080 0.0.0.0:*
> LISTEN
>
> tcpdump shows over and over SYN's but no replies on all members:
> 18:57:23.762712 IP member1: 52548 > 192.168.10.10.g2tag: Flags [S],
> seq 215397535, win 14600, options [mss 1460,sackOK,TS val 159216257
> ecr 0,nop,wscale 7], length 0
>
>
> Connecting to any other port from one member to another works fine,
> for example ssh.
>
> So I can't figure out why network communication works between all
> hosts, tomcat is listening, but trying to connect to the listening
> port fails.
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
> For additional commands, e-mail: users-help@tomcat.apache.org
>
>
--
Vince Stewart