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List:       keepalived-devel
Subject:    Re: [Keepalived-devel] Keepalived high persistence timeout
From:       Adrian Chapela <achapela.rexistros () gmail ! com>
Date:       2009-10-02 6:15:28
Message-ID: 4AC59A80.3080507 () gmail ! com
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Richard L. Allbery escribió:
> Hi Adrian,
>
> So, this may have been covered but do you know for a fact that keepalived is 
> causing the problem.  In other words have you taken keepalived out of the 
> loop and does your application work as you want?  Sure sounds like there's 
> something else going.
>   
Yes I know that keepalived (LVS) is causing the problem. If I connect 
the application with the server without keepalived I can maintain the 
connection open all time I want.
> On Thursday 01 October 2009 01:20, Adrian Chapela wrote:
>   
>> After a few tests I could see that my application doesn't know the real
>> state of a connection. It seems like Windows XP thinks that the
>> connection is OK but for the keepalived this connection is death after
>> some minutes of inactivity (I don't know how much time of inactivity but
>> I think about 5 - 9 minutes). When I try to use this connection I
>> receive an error because keepalived is sending to client a Reset package
>> (I think that it is to ensure that client is closing the lost openning
>> connection).
>>     
>
> If this is in fact what's going on it sounds like keeplived thinks it's a new 
> connection.  What does 'ipvsadm' show?  Does it show the connection as Active 
> or InActive?  
>   
I don't know now, I didn't test it, I will do in my next test.
> Also, not sure if this might be an issue but some places like AOL have 
> multiple proxy out gateways meaning that you're not always guaranteed the 
> client will have the same source IP address.  We've had to add network 
> persistence for such networks.  I don't know ... just some thoughts.
>   
Yes I know, I have problems with blackberry network and my http load 
balanced servers. For that case I have configured a network persistence 
(granularity) but in this case the load balancing is in a local network, 
there isn't proxies, there isn't firewall is a direct connection between 
client, keepalived and server.

The real problem is related to tcp keepalive but I can't do anything to 
maintain the connection open automatically, I think that in VB I need to 
program something to do that.
> --
> Richard L. Allbery, R&B Communications, Inc.
>
>   


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