포트 충돌 (zagent)

 

회사에서 아파치 + 톰캣 연결을 하는데. 여러개의 톰캣 인스턴스를 띄우기 위해서 6000번지부터 sequence하게 쭉 번호를 매기고 있다.

그런데, 특정 port에서 문제가 생겼다.

www계정으로 확인해보니. 다음과 같다.

프로세스가 안나타나서.. 당혹했지만..

 

netstat -anp | grep 6051 (Not all processes could be identified, non-owned process info  will not be shown, you would have to be root to see it all.) tcp        0      0 0.0.0.0:6051                0.0.0.0:*                   LISTEN      -                   tcp        1      0 127.0.0.1:6051              127.0.0.1:33565             CLOSE_WAIT  -                   tcp        1      0 127.0.0.1:6051              127.0.0.1:33841             CLOSE_WAIT  -                   tcp        1      0 127.0.0.1:6051              127.0.0.1:33315             CLOSE_WAIT  -                   tcp        1      0 127.0.0.1:6051              127.0.0.1:33836             CLOSE_WAIT  -                   tcp        1      0 127.0.0.1:6051              127.0.0.1:33322             CLOSE_WAIT  -                   tcp        1      0 127.0.0.1:6051              127.0.0.1:33629             CLOSE_WAIT  -                   tcp        1      0 127.0.0.1:6051              127.0.0.1:33627             CLOSE_WAIT  -                   tcp        1      0 127.0.0.1:6051              127.0.0.1:33625             CLOSE_WAIT  -                   tcp        1      0 127.0.0.1:6051              127.0.0.1:33183             CLOSE_WAIT  -                   tcp        1      0 127.0.0.1:6051              127.0.0.1:33182             CLOSE_WAIT  -                   tcp        1      0 127.0.0.1:6051              127.0.0.1:33178             CLOSE_WAIT  -                   tcp        1      0 127.0.0.1:6051              127.0.0.1:33932             CLOSE_WAIT  -                   tcp        1      0 127.0.0.1:6051              127.0.0.1:33968             CLOSE_WAIT  -                   tcp        1      0 127.0.0.1:6051              127.0.0.1:33722             CLOSE_WAIT  -                   tcp        1      0 127.0.0.1:6051              127.0.0.1:33707             CLOSE_WAIT  -                   tcp        1      0 127.0.0.1:6051              127.0.0.1:33495             CLOSE_WAIT  -                   tcp        1      0 127.0.0.1:6051              127.0.0.1:33245             CLOSE_WAIT  -                   tcp        1      0 127.0.0.1:6051              127.0.0.1:33242             CLOSE_WAIT  -                   tcp        1      0 127.0.0.1:6051              127.0.0.1:33220             CLOSE_WAIT  -                   tcp        1      0 127.0.0.1:6051              127.0.0.1:33737             CLOSE_WAIT  -                   udp        0      0 0.0.0.0:6051                0.0.0.0:*

 

 

root 계정으로 보니. 다행히 zagent라는 프로세스를 발견하였다.

netstat -anp | grep 6051 tcp        0      0 0.0.0.0:6051                0.0.0.0:*                   LISTEN      6426/zagent         tcp        1      0 127.0.0.1:6051              127.0.0.1:33565             CLOSE_WAIT  6426/zagent         tcp        1      0 127.0.0.1:6051              127.0.0.1:33841             CLOSE_WAIT  6426/zagent         tcp        1      0 127.0.0.1:6051              127.0.0.1:33315             CLOSE_WAIT  6426/zagent         tcp        1      0 127.0.0.1:6051              127.0.0.1:33836             CLOSE_WAIT  6426/zagent         tcp        1      0 127.0.0.1:6051              127.0.0.1:33322             CLOSE_WAIT  6426/zagent         tcp        1      0 127.0.0.1:6051              127.0.0.1:33629             CLOSE_WAIT  6426/zagent         tcp        1      0 127.0.0.1:6051              127.0.0.1:33627             CLOSE_WAIT  6426/zagent         tcp        1      0 127.0.0.1:6051              127.0.0.1:33625             CLOSE_WAIT  6426/zagent         tcp        1      0 127.0.0.1:6051              127.0.0.1:33183             CLOSE_WAIT  6426/zagent         tcp        1      0 127.0.0.1:6051              127.0.0.1:33182             CLOSE_WAIT  6426/zagent         tcp        1      0 127.0.0.1:6051              127.0.0.1:33178             CLOSE_WAIT  6426/zagent         tcp        1      0 127.0.0.1:6051              127.0.0.1:33932             CLOSE_WAIT  6426/zagent         tcp        1      0 127.0.0.1:6051              127.0.0.1:33968             CLOSE_WAIT  6426/zagent         tcp        1      0 127.0.0.1:6051              127.0.0.1:33722             CLOSE_WAIT  6426/zagent         tcp        1      0 127.0.0.1:6051              127.0.0.1:33707             CLOSE_WAIT  6426/zagent         tcp        1      0 127.0.0.1:6051              127.0.0.1:33495             CLOSE_WAIT  6426/zagent         tcp        1      0 127.0.0.1:6051              127.0.0.1:33245             CLOSE_WAIT  6426/zagent         tcp        1      0 127.0.0.1:6051              127.0.0.1:33242             CLOSE_WAIT  6426/zagent         tcp        1      0 127.0.0.1:6051              127.0.0.1:33220             CLOSE_WAIT  6426/zagent         tcp        1      0 127.0.0.1:6051              127.0.0.1:33737             CLOSE_WAIT  6426/zagent         udp        0      0 0.0.0.0:6051                0.0.0.0:*                               6426/zagent

 

아니 먼 일을 하길래, CLOSE_WAIT된 상태로 내비둔거얌.. TCP/IP 통신에서 CLOSE_WAIT는 종료하기 전에 종료 시그널을 받고 마지막 오케이만 받으면 해당 포트를 운영체제 맡겨 종료시키도록 하는 것이다.

 

그래서, zagent 환경설정파일을 보았다.

vi /etc/rc.d//init.d/zagent #!/bin/sh # chkconfig: 2345 99 10 # probe: true [ -f /usr/sbin/zagent ] || exit 0 RETVAL=0 start() {     echo -n "Starting zagent: "     /usr/sbin/zagent -start >& /dev/null     echo } stop() {     echo -n "Shutting down zagent: "     /usr/sbin/zagent -stop     sleep 1     /usr/sbin/zagent -kill     echo } kill() {     /usr/sbin/zagent -kill } restart() {     stop     sleep 1     kill     start } case "$1" in     start)         start         ;;     stop)         stop         ;;     restart)         restart         ;;     *)                 echo "Usage: zagent {start|stop|restart}"         exit 1 esac exit $RETVAL ~

 

환경설정파일은

다음과 같다.

 

vi /var/zagent/zagent.ini USE_WATCHDOG = 1 USERID = admin MANAGERIP1 = 222.122.201.111 MANAGERPORT1 = 6052 MANAGERIP2 = 222.122.201.112 MANAGERPORT2 = 6052 HOSTPORT = 6051 BUFFER_MEM = off LOCALIP = MAX_WORK_THREADS = 5 SAVEONOFF = 0 SAVEPERIOD = 0 MANAGERTYPE = 2 HOSTNUM = 0 HOSTID = 35107

 

오호라 포트 번호가 저렇게 되어 있구나..

 

아무도 해당포트를 안쓰는지 확인하고 포트번호는 8051, 8052로 바꿨다.

데몬 재시작한다.

 

/etc/rc.d/init.d/zagent restart

 

그리고, 문제는 사라졌다.

 

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