TCP problem on real server

[Hiep Nguyen]

I have 2 real server. I installed opendp, nginx to one with NIC

0000:01:00.1 'Ethernet Controller 10-Gigabit X540-AT2' if=em2 drv=ixgbe

I get IP 2.2.2.2 with opendp app. But I cannot ping it. After researching, I found that the reseason is checksum offload feature of NIC card. I fixed it with the following script:

cd dpdk-odp/opendp
sed -i -e 's/NETDP_HW_CHKSUM_DISABLE/NETDP_HW_CHKSUM_DISABLE/g' odp_main.c
make

OK, I can ping the server.
But, I cannot still complete tcp request to it. I monitored network packet using wireshark and found that the connection step is OK (three step handshake with 3 packets), after connection step, client send http request to nginx server, and the sending is OK, but server seemed not to handle the request ( or it handled but the request had been dropped before; or the response from nginx was dropped by lower modules like dpdk, opendp; or ...), so the client cannot get the response, and it retransmissed the request.

Can you help me about this problem?

PS: some pcap files with http request
with curl: https://drive.google.com/open?id=0B8RSLiwE-PAxZjE4VnRjT3ZfLUk
with telnet: https://drive.google.com/open?id=0B8RSLiwE-PAxQzlLNVRBSVRwdFU
https://drive.google.com/open?id=0B8RSLiwE-PAxejZrTEdmdlJuZ0E

[jiakai1000]

I have requested access but still not been allowed.

[blue]

I can't access your log too.
You may enable nginx debug.
You may enable netdp tcp stack debug log by "netdpcmd" command to get more information.