Re: [infinispan-dev] Hot Rod client sending data to itself - ISPN-8186
On 11 Aug 2017, at 16:30, Sanne Grinovero
<sanne(a)infinispan.org> wrote:
On 11 August 2017 at 14:14, Galder Zamarreño <galder(a)redhat.com> wrote:
> Hi,
>
> Re: https://issues.jboss.org/browse/ISPN-8186
>
> I've been looking at TRACE logs and what seems to happen is that is that
sometimes, when the client needs to create a new Socket, it sends using the same localport
as the Hot Rod server port. As a result, when the client sends something to the server, it
also receives it, hence it ends finding a request instead of a response. Analysis of the
logs linked in the JIRA can be found in [1].
>
> What I'm not sure about is how to fix this... There are ways to potentially pass
a specific localport to a Socket [2] but this could be a bit messy: It'd require us to
generate a random local port and see if that works, making sure that's not the server
port...
>
> However, I think the real problem we're having here is the fact that both the
server and client are bound to same IP address, 127.0.0.1. A simpler solution could be a
way to get the server to be in a different IP address to the client, but what would that
be that IP address and how to make sure it always works? Bind the server to eth0?
>
> Any other ideas?
You could create multiple aliases for the same loopback device, and
assign a different IP address to each of them.
But I fail to understand why you don't have specific ports for each
purpose? That's the point for using ports in the first place, no?
^ Hmmm?
The servers in the test use a random port that's available. The clients connect to
these ports. The local ports used by the clients are random. You need to use APIs such as
[2] to fix them.
So, what exactly are you talking about? Are you saying we should fix the local client
ports? As I said in the first post, we could try to find a random port that's not the
server one...
I must admit this scenario sounds very weird... how does Java allow you for a local port
to be bound to a port that's already in use by the server? It doesn't make sense.
I'll be trying to replicate this in a small unit test next few days...
Cheers,
Thanks,
Sanne
>
> Cheers,
>
> [1] https://gist.github.com/galderz/b8549259ff65cb74505c9268eeec96a7
> [2]
http://docs.oracle.com/javase/6/docs/api/java/net/Socket.html#Socket(java...
> --
> Galder Zamarreño
> Infinispan, Red Hat
>
>
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Galder Zamarreño
Infinispan, Red Hat