OS환경 : Oracle Linux 8.1 (64bit)
DB 환경 : Oracle Database 19.3.0.0
에러 : TNS-12541: TNS:no listener, TNS-12560: TNS:protocol adapter error, TNS-00511: No listener
리스너 기동 시 에러 발생하면서 리스너가 느리게 기동됨
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 | $ lsnrctl start LSNRCTL for Linux: Version 19.0.0.0.0 - Production on 06-JAN-2020 23:54:19 Copyright (c) 1991, 2019, Oracle. All rights reserved. Starting /ORA19/app/oracle/product/19.0.0/db_1/bin/tnslsnr: please wait... TNSLSNR for Linux: Version 19.0.0.0.0 - Production System parameter file is /ORA19/app/oracle/product/19.0.0/db_1/network/admin/listener.ora Log messages written to /ORA19/app/oracle/diag/tnslsnr/oel8/listener/alert/log.xml Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=oel8)(PORT=1521))) Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1521))) Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=oel8)(PORT=1521))) TNS-12541: TNS:no listener TNS-12560: TNS:protocol adapter error TNS-00511: No listener Linux Error: 111: Connection refused Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC1521))) STATUS of the LISTENER ------------------------ Alias LISTENER Version TNSLSNR for Linux: Version 19.0.0.0.0 - Production Start Date 06-JAN-2020 23:54:40 Uptime 0 days 0 hr. 0 min. 21 sec Trace Level off Security ON: Local OS Authentication SNMP OFF Listener Parameter File /ORA19/app/oracle/product/19.0.0/db_1/network/admin/listener.ora Listener Log File /ORA19/app/oracle/diag/tnslsnr/oel8/listener/alert/log.xml Listening Endpoints Summary... (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=oel8)(PORT=1521))) (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1521))) The listener supports no services The command completed successfully |
리스너가 느리게 올라가며 TNS-12541, TNS-12560. TNS-00511 이 발생함
리스너 기동시 리스너 로그
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 | $ tail -300f /ORA19/app/oracle/diag/tnslsnr/oel8/listener/trace/listener.log 2020-01-06T23:54:40.834243+09:00 LISTENER for Linux: Version 19.0.0.0.0 - Production Version 19.3.0.0.0 System parameter file is /ORA19/app/oracle/product/19.0.0/db_1/network/admin/listener.ora Log messages written to /ORA19/app/oracle/diag/tnslsnr/oel8/listener/alert/log.xml Trace information written to /ORA19/app/oracle/diag/tnslsnr/oel8/listener/trace/ora_2742_140676369955904.trc Trace level is currently 0 Started with pid=2742 Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=oel8)(PORT=1521))) Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1521))) Listener completed notification to CRS on start TIMESTAMP * CONNECT DATA [* PROTOCOL INFO] * EVENT [* SID] * RETURN CODE 2020-01-06T23:55:01.911943+09:00 WARNING: Subscription for node down event still pending 06-JAN-2020 23:55:01 * (CONNECT_DATA=(CID=(PROGRAM=)(HOST=oel8)(USER=oracle))(COMMAND=status)(ARGUMENTS=64)(SERVICE=LISTENER)(VERSION=318767104)) * status * 0 |
해결 방법 : /etc/hosts 파일 확인
이 문제의 대부분 원인은 /etc/hosts 파일의 오타나 미작성임
/etc/hosts 파일 확인
1 2 3 4 | # cat /etc/hosts 127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4 ::1 localhost localhost.localdomain localhost6 localhost6.localdomain6 192.169.137.50 oel8 |
현재 테스트 머신의 ip는 192.168.137.50 이며 hostname은 oel8임
하지만 /etc/hosts 에는 192.168.137.50이 아닌 192.169.137.50로 들어가있음
해당부분 정확하게 수정
1 2 3 4 | # cat /etc/hosts 127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4 ::1 localhost localhost.localdomain localhost6 localhost6.localdomain6 192.168.137.50 oel8 |
리스너 정지
1 2 3 4 5 6 7 8 | $ lsnrctl stop LSNRCTL for Linux: Version 19.0.0.0.0 - Production on 06-JAN-2020 23:59:37 Copyright (c) 1991, 2019, Oracle. All rights reserved. Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=oel8)(PORT=1521))) The command completed successfully |
리스너 시작
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 | $ lsnrctl start LSNRCTL for Linux: Version 19.0.0.0.0 - Production on 06-JAN-2020 23:59:45 Copyright (c) 1991, 2019, Oracle. All rights reserved. Starting /ORA19/app/oracle/product/19.0.0/db_1/bin/tnslsnr: please wait... TNSLSNR for Linux: Version 19.0.0.0.0 - Production System parameter file is /ORA19/app/oracle/product/19.0.0/db_1/network/admin/listener.ora Log messages written to /ORA19/app/oracle/diag/tnslsnr/oel8/listener/alert/log.xml Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=oel8)(PORT=1521))) Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1521))) Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=oel8)(PORT=1521))) STATUS of the LISTENER ------------------------ Alias LISTENER Version TNSLSNR for Linux: Version 19.0.0.0.0 - Production Start Date 06-JAN-2020 23:59:45 Uptime 0 days 0 hr. 0 min. 0 sec Trace Level off Security ON: Local OS Authentication SNMP OFF Listener Parameter File /ORA19/app/oracle/product/19.0.0/db_1/network/admin/listener.ora Listener Log File /ORA19/app/oracle/diag/tnslsnr/oel8/listener/alert/log.xml Listening Endpoints Summary... (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=oel8)(PORT=1521))) (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1521))) The listener supports no services The command completed successfully |
리스너가 빠르게 올라가고 TNS 에러도 발생하지 않음
원인 : /etc/hosts 파일의 오타 문제
참조 :