Hi,
We are seeing a very strange thing with the port we are using 33000. Our
daemon hvmmgrd uses port 33000 but when hvmmgrd dies, xl/qemu-dm/tapdisk2
processes grab that port and we are not able to restart our daemon.
Why does qemu-dm/xl/tapdisk2 go after our port? We have tried changing to
different port numbers but the qemu-dm/xl/tapdisk2 processes are going
after that port only. It almost feels like kernel is giving back last freed
port. But why?
lc-4:/tmp # netstat -tulp --numeric-port
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address
State PID/Program name
tcp 0 0 *:16111 *:*
LISTEN 31651/ssc_podd
tcp 0 0 *:111 *:*
LISTEN 13173/rpcbind
tcp 0 0 *:54001 *:*
LISTEN 31601/cardmgr
tcp 0 0 *:22 *:*
LISTEN 13848/sshd
tcp 0 0 *:7800 *:*
LISTEN 21380/dlm_hostd
tcp 0 0 *:680 *:*
LISTEN 1351/bamc
tcp 0 0 *:111 *:*
LISTEN 13173/rpcbind
tcp 0 0 *:22 *:*
LISTEN 13848/sshd
tcp 0 0 *:11008 *:*
LISTEN 21354/save_techd
*tcp 0 0 *:33000 *:*
LISTEN 26475/hvmmgrd*
udp 0 0 *:111
*:* 13173/rpcbind
udp 0 0 127.0.0.2:123 *:*
14957/ntpd
udp 0 0 localhost:123
*:* 14957/ntpd
udp 0 0 *:123
*:* 14957/ntpd
udp 0 0 *:625 *:*
13173/rpcbind
udp 0 0 *:679
*:* 1351/bamc
udp 0 0 *:111
*:* 13173/rpcbind
udp 0 0 localhost:123
*:* 14957/ntpd
udp 0 0 fe80::ff:fe01:308%6:123
*:* 14957/ntpd
// kill hvmmgrd
lc-4:~ # netstat -tulp --numeric-ports
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address
State PID/Program name
tcp 0 0 *:5900 *:*
LISTEN 8300/qemu-dm
tcp 0 0 *:5901 *:*
LISTEN 11985/qemu-dm
tcp 0 0 *:16111 *:*
LISTEN 31651/ssc_podd
tcp 0 0 *:111 *:*
LISTEN 13173/rpcbind
tcp 0 0 *:54001 *:*
LISTEN 31601/cardmgr
tcp 0 0 *:22 *:*
LISTEN 13848/sshd
tcp 0 0 *:7800 *:*
LISTEN 21380/dlm_hostd
tcp 0 0 *:680 *:*
LISTEN 1351/bamc
tcp 0 0 *:111 *:*
LISTEN 13173/rpcbind
tcp 0 0 *:22 *:*
LISTEN 13848/sshd
tcp 0 0 *:11008 *:*
LISTEN 21354/save_techd
*tcp 0 0 *:33000 *:*
LISTEN 8265/tapdisk2*
udp 0 0 *:111
*:* 13173/rpcbind
udp 0 0 127.0.0.2:123
*:* 14957/ntpd
udp 0 0 localhost:123
*:* 14957/ntpd
udp 0 0 *:123
*:* 14957/ntpd
udp 0 0 *:625
*:* 13173/rpcbind
udp 0 0 *:679
*:* 1351/bamc
udp 0 0 *:111
*:* 13173/rpcbind
udp 0 0 localhost:123
*:* 14957/ntpd
udp 0 0 fe80::ff:fe01:308%6:123
*:* 14957/ntpd
udp 0 0 *:123
*:* 14957/ntpd
udp 0 0 *:625
*:* 13173/rpcbind
Thanks,
/Saurabh
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