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Subject: Re: CLOSE_WAIT between Application (Tomcat) and Apache HTTPD
To: users@tomcat.apache.org
References: <CANrgFfCZ7Ozuw2AgUCDAG=0oHbu=bzk7DB2_uZcKGFxgKiUO+A@mail.gmail.com>
 <4bdcb598-8d2a-39b0-61cb-09a5c8fedd39@christopherschultz.net>
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 <e7245602-3836-3cc4-7df7-24f7cf83f2e3@christopherschultz.net>
 <CANrgFfCRNb_BqhKdWdhm1Z8rvSHBhUhjU-4HaZy+kZoJpF1KRg@mail.gmail.com>
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archived-at: Thu, 11 May 2017 15:20:36 -0000

On 11.05.2017 16:57, Adhavan Mathiyalagan wrote:
> Hi Chris,
>
> *Tomcat Configuration*
>
> HTTP/1.1  and APR
>
> <Connector port="${HTTP_PORT}" protocol="HTTP/1.1"
>
>                 connectionTimeout="20000"
>
>                 redirectPort="8443"  maxHttpHeaderSize="8192" />
>
>
> <WatchedResource>${catalina.base}/conf/web.xml</WatchedResource>
>
>      <Manager pathname=""
> className="org.apache.catalina.session.StandardManager"
> maxActiveSessions="400"/>
>      <!--
>      <Manager pathname="" />
>      -->
>
>
> *HTTPD Configuration*
>
>
> ServerTokens OS
> ServerRoot "/etc/httpd"
>
> PidFile run/httpd.pid
>
> Timeout 60
> KeepAlive Off
> MaxKeepAliveRequests 100
> KeepAliveTimeout 15
> <IfModule prefork.c>
> StartServers    256
> MinSpareServers    100
> MaxSpareServers    500
> ServerLimit    2000
> MaxClients    2000
> MaxRequestsPerChild  4000
> </IfModule>
>
> <IfModule worker.c>
> StartServers         4
> MaxClients         300
> MinSpareThreads     25
> MaxSpareThreads     75
> ThreadsPerChild     25
> MaxRequestsPerChild  0
> </IfModule>
>
>
>
> ServerName *
> Timeout 300
> ProxyPreserveHost On
> ProxyRequests Off
> <Proxy balancer://wsiservices>
> BalancerMember http://dl360x3799:8011/admx_ecms/view/services retry=60
> status=+H route=dl360x3799.8011
> BalancerMember http://dl360x3799:8012/admx_ecms/view/services retry=60
> status=+H route=dl360x3799.8012
> ProxySet stickysession=JSESSIONID
> ProxySet lbmethod=byrequests
> </Proxy>
> ProxyPass /custcare_cmax/view/services balancer://wsiservices
> ProxyPassReverse /custcare_cmax/view/services balancer://wsiservices
> ProxyPass /admx_ecms/view/services balancer://wsiservices
> ProxyPassReverse /admx_ecms/view/services balancer://wsiservices
> <Proxy balancer://wsiinstances>
> BalancerMember http://dl360x3806:8035/custcare_cmax/services/ws_cma3
> retry=60  route=dl360x3806.8035
> BalancerMember http://dl360x3806:8036/custcare_cmax/services/ws_cma3
> retry=60  route=dl360x3806.8036
> ProxySet stickysession=JSESSIONID
> ProxySet lbmethod=byrequests
> </Proxy>
> ProxyPass /custcare_cmax/services/ws_cma3 balancer://wsiinstances
> ProxyPassReverse /custcare_cmax/services/ws_cma3 balancer://wsiinstances
> ProxyPass /admx_ecms/services/ws_cma3 balancer://wsiinstances
> ProxyPassReverse /admx_ecms/services/ws_cma3 balancer://wsiinstances
> <Proxy balancer://admxcluster>
> BalancerMember http://dl360x3799:8011/admx_ecms retry=60 status=+H
> route=dl360x3799.8011
> BalancerMember http://dl360x3799:8012/admx_ecms retry=60 status=+H
> route=dl360x3799.8012
> ProxySet stickysession=JSESSIONID
> ProxySet lbmethod=byrequests
> </Proxy>
> ProxyPass /admx_ecms balancer://admxcluster
> ProxyPassReverse /admx_ecms balancer://admxcluster
> <Proxy balancer://cmaxcluster>
> BalancerMember http://dl360x3799:8021/custcare_cmax retry=60 status=+H
> route=dl360x3799.8021
> BalancerMember http://dl360x3799:8022/custcare_cmax retry=60 status=+H
> route=dl360x3799.8022
> BalancerMember http://dl360x3806:8035/custcare_cmax retry=60
> route=dl360x3806.8035
> BalancerMember http://dl360x3806:8036/custcare_cmax retry=60
> route=dl360x3806.8036
> ProxySet stickysession=JSESSIONID
> ProxySet lbmethod=byrequests
> </Proxy>
> ProxyPass /custcare_cmax balancer://cmaxcluster
> ProxyPassReverse /custcare_cmax balancer://cmaxcluster
> <Proxy balancer://mxcluster>
> BalancerMember http://dl360x3805:8089/mx route=dl360x3806.8089
> ProxySet stickysession=JSESSIONID
> ProxySet lbmethod=byrequests
> </Proxy>
> ProxyPass /mx balancer://mxcluster
> ProxyPassReverse /mx balancer://mxcluster
> <Location /ecmsbm>
> SetHandler balancer-manager
> </Location>
> <Location /ecms-server-status>
> SetHandler server-status
> </Location>
> ExtendedStatus On
> TraceEnable Off
> SetEnv force-proxy-request-1.0 1
> SetEnv proxy-nokeepalive 1
>
>

Hi.
Your netstat screenshot showed the CLOSE_WAIT connections on port 8030, like :

tcp      509      0 ::ffff:10.61.137.49:8030    ::ffff:10.61.137.47:60903
CLOSE_WAIT

But I do not see any mention of port 8030 in your configs above. So what is listening there ?
("netstat --tcp -aopn" would show this)


> On Thu, May 11, 2017 at 7:20 PM, Christopher Schultz <
> chris@christopherschultz.net> wrote:
>
>> -----BEGIN PGP SIGNED MESSAGE-----
>> Hash: SHA256
>>
>> Adhavan,
>>
>> On 5/11/17 9:30 AM, Adhavan Mathiyalagan wrote:
>>> The connections in the CLOSE_WAIT are owned by the Application
>>> /Tomcat process.
>>
>> Okay. Can you please post your configuration on both httpd and Tomcat
>> sides? If it's not clear from your configuration, please tell us which
>> type of connector you are using (e.g. AJP/HTTP and BIO/NIO/APR).
>>
>> - -chris
>> -----BEGIN PGP SIGNATURE-----
>> Comment: GPGTools - http://gpgtools.org
>> Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/
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>>
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