the pid of the process is 1996291.
there are 65534 fds in /proc/1996291/fd
, most of the fds are sockets, like this:
lrwx------ 1 root root 64 Dec 30 13:59 10000 -> socket:[952574733]
lrwx------ 1 root root 64 Dec 30 13:59 10001 -> socket:[952566188]
I know that the number in bracket is inode of the socket. There should be one same inode in /proc/net/tcp
for every socket. However, some inode can be found, but some can't:
cat /proc/net/tcp | grep 952574733
If I found the inode, the output like follows:
sl local_address rem_address st tx_queue rx_queue tr tm->when retrnsmt uid timeout inode
336: 4114C80A:271A 1914C80A:0CEA 01 00000000:00000000 02:0000BE1B 00000000 0 0 962759319 2 ffff88035a20cb00 20 4 30 10 16
This is a real connection.
I use netstat -tnp
to show connections and get a great many TIME_WAIT
connections. I don't know whether they have relationship with my problem.
I use lsof -p 1996291
, the output is like this, a great many sockets:
app 1996291 root *520u sock 0,8 0t0 953021420 protocol: TCP
app 1996291 root *521u sock 0,8 0t0 953027193 protocol: TCP
app 1996291 root *522u sock 0,8 0t0 953021422 protocol: TCP
app 1996291 root *523u sock 0,8 0t0 953038715 protocol: TCP
There three kernal options have been set to 1:
net.ipv4.tcp_tw_reuse
net.ipv4.tcp_tw_recycle
net.ipv4.tcp_syncookies
I can't solve these problem for several days, anyone can help me?