some port is not always be useding by a process, may be used at some time in the past so, from the zk log, i want to know which process accessed zk
wangyongqiang0...@163.com From: Shawn Heisey Date: 2018-09-12 18:10 To: user Subject: Re: can not know the process name from zk log On 9/12/2018 2:33 AM, wangyongqiang0...@163.com wrote: > from zk log, i can get the ip and port, i think if zk can print the process > info with the ip and port , will help us in some cases What precisely are you after? A java program can typically report what PID its process has, but I don't know that any other process information is available. I have not checked to see whether ZK logs the PID it's using at any point. Usually such information is logged at startup (if it is ever logged at all) and not anywhere else. With the port number, you can use a program like lsof or netstat to determine the pid, and I think this works on both the client and server side. Here's an example of that for another Java program. This isn't zookeeper, but the same thing will work for ZK too. root@smeagol:~# lsof -Pn -i:45499 COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME java 8713 elyograg 35u IPv6 95610 0t0 TCP 127.0.0.1:45499 (LISTEN) java 8713 elyograg 62u IPv6 6442866 0t0 TCP 127.0.0.1:52686->127.0.0.1:45499 (CLOSE_WAIT) java 8713 elyograg 67u IPv6 6443911 0t0 TCP 127.0.0.1:52792->127.0.0.1:45499 (CLOSE_WAIT) java 8713 elyograg 78u IPv6 6446143 0t0 TCP 127.0.0.1:52814->127.0.0.1:45499 (ESTABLISHED) java 8713 elyograg 83u IPv6 6444628 0t0 TCP 127.0.0.1:45499->127.0.0.1:52814 (ESTABLISHED) java 8713 elyograg 84u IPv6 6443524 0t0 TCP 127.0.0.1:52710->127.0.0.1:45499 (CLOSE_WAIT) java 8713 elyograg 85u IPv6 6442460 0t0 TCP 127.0.0.1:52360->127.0.0.1:45499 (CLOSE_WAIT) java 8713 elyograg 87u IPv6 6445101 0t0 TCP 127.0.0.1:52766->127.0.0.1:45499 (CLOSE_WAIT) java 8713 elyograg 113u IPv6 6443962 0t0 TCP 127.0.0.1:52844->127.0.0.1:45499 (ESTABLISHED) java 8713 elyograg 119u IPv6 6444645 0t0 TCP 127.0.0.1:45499->127.0.0.1:52844 (ESTABLISHED) java 8713 elyograg 200u IPv6 6441819 0t0 TCP 127.0.0.1:52656->127.0.0.1:45499 (CLOSE_WAIT) The -Pn parameters instruct lsof to not translate port numbers or IP addresses to names. I do this to make the lsof program run faster. Thanks, Shawn
