JPOS keep alive configuration in linux

[Yuet Yew Wong]

Hi ,

I have wonder after setting the keep alive to "yes" in jpos 1.6.4 version , I typed "netstat -ntpo" in linux it showed my status still off . Is it any missing ?

Thank for advices.

[Victor Salaman]

Your question is vague.

How are you setting a keepalive in jPOS 1.6.4?

/V

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[Yuet Yew Wong]

Hi ,

I am setting my keep alive setting in the configuration xml as below: 

  </channel>

        <in>spSnd</in>

        <out>spRcv</out>

        <reconnect-delay>5000</reconnect-delay>

        <!--reconnect-delay>30000</reconnect-delay-->

        <keep-alive>yes</keep-alive>

        <space>transient:default</space>

While I do receive message sending "0000" after enabling the keep alive . I wonder in the linux my one it still off

tcp        0      0 xxx.xxx.xxx.xxx:33455       xxx.xxx.xxx.xxxx:1819         ESTABLISHED 5051/java           off (0.00/0/0)

From linux articles, after enable 

netstat -ntpo

Active Internet connections (w/o servers)
Proto Recv-Q Send-Q Local Address          Foreign Address        State       PID/Program name    Timer
tcp        0      0 10.0.0.1:57547         10.0.0.1:5000          ESTABLISHED 9851/./tcp_cl       keepalive (7164.06/0/0)

Thank for advices.

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[Alejandro Revilla]

That keep-alive at the ChannelAdaptor level is another thing, higher level zero-message pings.

What you want is to set the keep alive at the channel level,

You need to add:

<property name="keep-alive" value="true" />

inside your <channel>....</channel> definition.

​

PS.- Sorry @vsalaman for the copyright violation with your markdown style, it's nice :)

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[Yuet Yew Wong]

hi , 

I have added inside the channel with keep-alive . Is there anyway to check is this working? any different with adding keep-alive in channel and channeladapater?

Thank for advices.

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[Alejandro Revilla]

You can establish a connection, keep it idle, and monitor it with tcpdump.

[Yuet Yew Wong]

Hi , 

I have monitored there are difference while connecting and idle via "Tcpdump" command. Does JPOS detected broken connection will it re-establish new connection and how to monitor it ?

Thank for advice.

On Sat, Oct 18, 2014 at 2:26 AM, Alejandro Revilla <a...@jpos.org> wrote:

You can establish a connection, keep it idle, and monitor it with tcpdump.

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[Alejandro Revilla]

Connection will be re-established.

You'll see that in the log, and you can monitor it with netstat.

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