root@chi02 ~ # lsof -p 26897 | grep TCP | wc -l
16288
root@chi02 ~ # ls -l /proc/26897/fd/ | grep socket | wc -l
16336
root@chi02 ~ # ls -l /proc/26897/fd/ | grep socket | head -n 10
lrwx------ 1 logstash logstash 64 Aug  1 14:09 100 -> socket:[2463133248]
lrwx------ 1 logstash logstash 64 Aug  2 17:09 1000 -> socket:[2505763491]
lrwx------ 1 logstash logstash 64 Aug 14 07:39 10000 -> socket:[3025102986]
lrwx------ 1 logstash logstash 64 Aug 14 07:39 10001 -> socket:[3025197814]
lrwx------ 1 logstash logstash 64 Aug 14 07:39 10002 -> socket:[3025274905]
lrwx------ 1 logstash logstash 64 Aug 14 08:09 10003 -> socket:[3025343204]
lrwx------ 1 logstash logstash 64 Aug 14 08:09 10004 -> socket:[3025442637]
lrwx------ 1 logstash logstash 64 Aug 14 08:09 10005 -> socket:[3025522588]
lrwx------ 1 logstash logstash 64 Aug 14 08:09 10006 -> socket:[3025602202]
lrwx------ 1 logstash logstash 64 Aug 14 08:09 10007 -> socket:[3025671282]
root@chi02 ~ # lsof -p 26897 | grep TCP | head -n 10
java    26897 logstash   45u  IPv6         2460451358      0t0        TCP 10.32.186.73:52286->10.32.186.90:9200 (CLOSE_WAIT)
java    26897 logstash   46u  IPv6         2460488220      0t0        TCP 10.32.186.73:52466->10.32.186.90:9200 (CLOSE_WAIT)
java    26897 logstash   47u  IPv6         2460525436      0t0        TCP 10.32.186.73:52595->10.32.186.90:9200 (CLOSE_WAIT)
java    26897 logstash   48u  IPv6         2460597478      0t0        TCP 10.32.186.73:52697->10.32.186.90:9200 (CLOSE_WAIT)
java    26897 logstash   49u  IPv6         2460642612      0t0        TCP 10.32.186.73:52811->10.32.186.90:9200 (CLOSE_WAIT)
java    26897 logstash   50u  IPv6         2460692013      0t0        TCP 10.32.186.73:52929->10.32.186.90:9200 (CLOSE_WAIT)
java    26897 logstash   51u  IPv6         2460726608      0t0        TCP 10.32.186.73:53050->10.32.186.90:9200 (CLOSE_WAIT)
java    26897 logstash   52u  IPv6         2460780795      0t0        TCP 10.32.186.73:53170->10.32.186.90:9200 (CLOSE_WAIT)
java    26897 logstash   53u  IPv6         2460837116      0t0        TCP 10.32.186.73:53280->10.32.186.90:9200 (CLOSE_WAIT)
java    26897 logstash   54u  IPv6         2460874412      0t0        TCP 10.32.186.73:53426->10.32.186.90:9200 (CLOSE_WAIT)
root@chi02 ~ #