Hi, Apologies in advance if this is the wrong mailing list. I was unable to find one specific to mod_jk and this looked the most relevant.
I have the following apache tomcat server configuration set up: Apache 2.2.3 , mod_jk 1.2.32 , and tomcat 6.0.32 running HelloWorld.war If I send a request to http://remotehost/HelloWorld/index.jsp, I observe the following behaviour: 1 ) My tomcat AJP connector is listening on port 8010 TEST [root@remotehost]$ netstat -an | grep 8010 tcp 0 0 0.0.0.0:8010 0.0.0.0:* LISTEN 2) I make a request to http://remotehost/HelloWorld/index.jsp and see the apache establish a connection to tomcat. The response comes back straightaway. TEST [root@remotehost]$ netstat -an | grep 8010 tcp 0 0 0.0.0.0:8010 0.0.0.0:* LISTEN tcp 0 0 10.34.2.140:8010 10.34.2.140:46792 ESTABLISHED tcp 0 0 10.34.2.140:46792 10.34.2.140:8010 ESTABLISHED 3) After reaching KeepAliveTimeout on the Tomcat AJP connector, the connections change state: TEST [root@ remotehost]$ netstat -an | grep 8010 tcp 0 0 0.0.0.0:8010 0.0.0.0:* LISTEN tcp 0 0 10.34.2.140:8010 10.34.2.140:46792 FIN_WAIT2 tcp 1 0 10.34.2.140:46792 10.34.2.140:8010 CLOSE_WAIT 4) After about another minute, the FIN_WAIT2 is cleared, but the CLOSE_WAIT remains (on the apache) until reaching net.ipv4.tcp_keepalive_time (which is set to 7200 seconds) TEST [root@ remotehost]$ netstat -an | grep 8010 tcp 0 0 0.0.0.0:8010 0.0.0.0:* LISTEN tcp 1 0 10.34.2.140:46792 10.34.2.140:8010 CLOSE_WAIT Everything there looks fine except for the CLOSE_WAIT which lingers around for 2 hours until it hits tcp_keepalive_time. Adding JkOptions +DisableReuse will prevent the CLOSE_WAITs staying, but that is also said to have a performance impact. My question is if this is the expected tcpip state after the thread has finished, because in JDBC I see the connections permanently ESTABLISHED or in TIME_WAIT. Thanks for any help. Ed. ________________________________ The information contained in this email is strictly confidential and for the use of the addressee only, unless otherwise indicated. If you are not the intended recipient, please do not read, copy, use or disclose to others this message or any attachment. Please also notify the sender by replying to this email or by telephone (+44 (0)20 7896 0011) and then delete the email and any copies of it. Opinions, conclusions (etc) that do not relate to the official business of this company shall be understood as neither given nor endorsed by it. IG Group Holdings plc is a company registered in England and Wales under number 01190902. VAT registration number 761 2978 07. Registered Office: Cannon Bridge House, 25 Dowgate Hill, London EC4R 2YA. Authorised and regulated by the Financial Services Authority. FSA Register number 114059.
