Local port paradox - one process LISTENs other processes have same local host:port in ESTABLISHED connections

[neopaf]

Friends, netstat -antp shows that port 3408 LISTENed by tarantool process 1658205, but ESTABLISHED with tarantool processes 1684675 and 1658387:

Active Internet connections (w/o servers)
Proto Recv-Q Send-Q Local Address           Foreign Address         State   
tcp        0      0 10.127.67.81:3408       0.0.0.0:*               LISTEN      1658205/tarantool i 
tcp        0      0 10.127.67.81:3408       10.127.67.81:56904      ESTABLISHED 1684675/tarantool i
tcp        0      0 10.127.67.81:3408       10.127.67.87:3405       ESTABLISHED 1658387/tarantool i

All these 3 processes are totally unrelated, as they belong to different tarantool instances, not threads (LWPs) of one instance:

hermes   1658205 21.7  3.5 9504712 2346608 ?     Rsl  Jan16 6178:17 tarantool init.lua <running>: hermes_cluster@storage-8-replica
hermes   1658387 12.8  3.5 9346828 2293228 ?     Ssl  Jan16 3658:59 tarantool init.lua <running>: hermes_cluster@storage-21-replica
hermes   1684675 45.7  2.5 8076148 1682600 ?     Rsl  Jan16 12987:16 tarantool init.lua <running>: hermes_cluster@router-3

Please share your vision on how this could be?

(I wanted to analyze the strange behavior of storage-8-replica by analyzing tcpdump of this node, so who exactly is handling requests to 10.127.67.81:3408 is critical in understanding what's going on. I though that 10.127.67.81:3408 is handled by storage-8-replica as per config:

[10:21]hermes@rd-hmstnt01 conf.d$ cat hermes_cluster.storage-8-replica.yml
hermes_cluster.storage-8-replica:
    advertise_uri: 10.127.67.81:3408
    http_port: 3198

[neopaf]

my bad. I search for problematic netstat lines like this:

netstat -antp|grep ESTAB|awk '{ if ($4="10.127.67.81:3408") print $0 }'

while I should've searched like that:

netstat -antp|grep ESTAB|awk '{ if ($4=="10.127.67.81:3408") print $0 }'