Hi! There is tcpdump out between tomcat 10.0.0.51 server and apache+mod_jk on 10.0.0.52
Start TCP session: 13:45:47.289899 IP 10.0.0.52.53082 > 10.0.0.51.8003: S 4292589130:4292589130(0) win 5840 <mss 1460,sackOK,timestamp 2476219269 0,nop,wscale 9> 13:45:47.289907 IP 10.0.0.51.8003 > 10.0.0.52.53082: S 129259122:129259122(0) ack 4292589131 win 5792 <mss 1460,sackOK,timestamp 3849427499 2476219269,nop,wscale 9> 13:45:47.289988 IP 10.0.0.52.53082 > 10.0.0.51.8003: . ack 1 win 12 <nop,nop,timestamp 2476219269 3849427499> 13:45:47.290031 IP 10.0.0.52.53082 > 10.0.0.51.8003: . 1:1449(1448) ack 1 win 12 <nop,nop,timestamp 2476219269 3849427499> 13:45:47.290037 IP 10.0.0.51.8003 > 10.0.0.52.53082: . ack 1449 win 17 <nop,nop,timestamp 3849427499 2476219269> 13:45:47.290041 IP 10.0.0.52.53082 > 10.0.0.51.8003: P 1449:1954(505) ack 1 win 12 <nop,nop,timestamp 2476219269 3849427499> [...] Looks ok End Of session: 13:49:06.791572 IP 10.0.0.52.53082 > 10.0.0.51.8003: . ack 281580 win 187 <nop,nop,timestamp 24764187723849627001> 13:49:06.791593 IP 10.0.0.52.53082 > 10.0.0.51.8003: . ack 282428 win 187 <nop,nop,timestamp 24764187723849627001> tomcat trying to close connection and send FIN: 13:51:14.322018 IP 10.0.0.51.8003 > 10.0.0.52.53082: F 282428:282428(0) ack 6787 win 46 <nop,nop,timestamp 3849754531 2476418772> Reply from mod_jk: 13:51:14.361441 IP 10.0.0.52.53082 > 10.0.0.51.8003: . ack 282429 win 187 <nop,nop,timestamp 24765463433849754531> 75 second timeout here FIN from mod_jk: 13:52:31.511273 IP 10.0.0.52.53082 > 10.0.0.51.8003: F 6787:6787(0) ack 282429 win 187 <nop,nop,timestamp 2476623493 3849754531> RST from tomcat!: 13:52:31.511289 IP 10.0.0.51.8003 > 10.0.0.52.53082: R 129541551:129541551(0) win 0 Why this going on and why this looking so strange? =)