Here are my updates :
Interesting finding is whatever AJP connectors stuck in Keepalive mode for
long time are for requests coming from remote clients. All connections for
requests coming from local (internal network) clients were changed to
CLOSE_WAIT after some time.
Today I tried with keepAliveTimeout and connectionTimeout setting at
server.xml
<Connector port="8009" address="${jboss.bind.address}" protocol="AJP/1.3"
emptySessionPath="true" enableLookups="false" redirectPort="8443"
connectionTimeout="300000" keepAliveTimeout="300000" />
I monitored from both JBoss JMX console and netstat. Connectors at JMX
console stayed at stage 6 (STAGE_KEEPALIVE) for 5 minutes and changed to
stage 7 (STAGE_ENDED ) after keep alive timeout (5 minutes). But in
netstat it is still shown up as follows:
netstat -aonp | grep 8009
tcp 0 0 0.0.0.0:8009 0.0.0.0:*
LISTEN 5229/java off (0.00/0/0)
tcp 0 0 xx.xx.xx.xxx:8009 yy.yy.yyy.yyy:49771
ESTABLISHED 25229/java off (0.00/0/0)
tcp 0 0 xx.xx.xx.xxx:8009 yy.yy.yyy.yyy:49768
ESTABLISHED 25229/java off (0.00/0/0)
tcp 0 0 xx.xx.xx.xxx:8009 yy.yy.yyy.yyy:49767
ESTABLISHED 25229/java off (0.00/0/0)
tcp 0 0 xx.xx.xx.xxx:8009 yy.yy.yyy.yyy:49766
ESTABLISHED 25229/java off (0.00/0/0)
tcp 0 0 xx.xx.xx.xxx:8009 yy.yy.yyy.yyy:49765
ESTABLISHED 25229/java off (0.00/0/0)
pid 25229 is process id of JBoss. I am running JBoss on CentOS 5.2, Kernel
2.6.18-.
I will be monitoring the outcomes tonight.
Regards,
GC
kvancamp wrote:
>
>
> Guy Cube wrote:
>>
>> Hello,
>>
>> We are also haveing exact same issue in our environment. We are using
>> JBoss 4.2.3, Apache 2.2.11 with mod_proxy_ajp using ajp to connect
>> between Apache and JBoss. It happens intermittently and when i happnes
>> all AJP's TCP connections are stayed in ESTABLISHED state on JBoss
>> machine. In thread dump, all AJP threads are in waiting state.
>>
>> Anyone found solution or work around for this issue?
>>
>> Thanks,
>> GC
>>
>
> For now I have set the connectionTimeout to 10 minutes on my AJP
> connection, e.g.
> <!-- Define an AJP 1.3 Connector on port 8009, timeout in 10 mins. -->
> <Connector port="8009" address="${jboss.bind.address}"
> protocol="AJP/1.3"
> emptySessionPath="true" enableLookups="false" redirectPort="8443"
> connectionTimeout="600000"
> />
>
> I am monitoring results, it is too soon to tell if this alone will solve
> the problem or if I also have to delve into my firewall (I was incorrect
> in my original response above - there IS a firewall between my IIS proxy
> and my JBoss server, and it has a 1 hour idle tcp session timeout), or my
> IIS proxy (which is configured with a 5-minute socket timeout).
>
> Ken
>
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