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Problem Description: Today replicate a virtual machine environment with vbox, the results copied virtual machine database listener startup error:
[oracle@dg2 ~]$ lsnrctl start LSNRCTL for Linux: Version 11.2.0.4.0 - Production on 23-DEC-2016 11:39:38 Copyright (c) 1991, 2013, Oracle. All rights reserved. Starting /u01/app/oracle/product/11.2.0/dbhome_1/bin/tnslsnr: please wait... TNSLSNR for Linux: Version 11.2.0.4.0 - Production System parameter file is /u01/app/oracle/product/11.2.0/dbhome_1/network/admin/listener.ora Log messages written to /u01/app/oracle/diag/tnslsnr/dg2/listener/alert/log.xml Error listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=dg1)(PORT=1521))) TNS-12545: Connect failed because target host or object does not exist TNS-12560: TNS:protocol adapter error TNS-00515: Connect failed because target host or object does not exist Linux Error: 111: Connection refused Listener failed to start. See the error message(s) above...
Solving steps:
1, view the host name, host name inconsistencies are found, then modify / etc / sysconfig / network, reboot the host name changed successfully
[root@dg1 ~]# hostname dg2 [root@dg1 ~]# vi /etc/sysconfig/network NETWORKING=yes HOSTNAME=dg2 GATEWAY=192.168.56.1 [root@dg2 ~]# hostname dg2
2, found that / etc / hosts or host name and address of the previous 192.168.56.2 dg1
[root@dg2 ~]# cat /etc/hosts 127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4 ::1 localhost localhost.localdomain localhost6 localhost6.localdomain6 192.168.56.2 dg1 修改为如下： [root@dg2 ~]# cat /etc/hosts 127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4 ::1 localhost localhost.localdomain localhost6 localhost6.localdomain6 192.168.56.3 dg2
3, tnsname.ora configured correctly
[oracle@dg2 admin]$ cat tnsnames.ora # tnsnames.ora Network Configuration File: /u01/app/oracle/product/11.2.0/dbhome_1/network/admin/tnsnames.ora # Generated by Oracle configuration tools. ORCL_ST = (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.56.3)(PORT = 1521)) ) (CONNECT_DATA = (SERVICE_NAME = orcl) ) ) LISTENER_ORCL = (ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521)) ORCL = (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521)) ) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = orcl) ) ) ORCL_PD = (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.56.2)(PORT = 1521)) ) (CONNECT_DATA = (SERVICE_NAME = orcl) ) )
4, finally hit on the idea to view the monitor file cat /u01/app/oracle/product/11.2.0/dbhome_1/network/admin/listener.ora
The results found a problem listening host name or the original file, the problem has finally been found, change the hostname problem is solved!
[root@dg2 ~]# cat /u01/app/oracle/product/11.2.0/dbhome_1/network/admin/listener.ora # listener.ora Network Configuration File: /u01/app/oracle/product/11.2.0/dbhome_1/network/admin/listener.ora # Generated by Oracle configuration tools. LISTENER2 = (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = dg1)(PORT = 1522)) ) SID_LIST_LISTENER = (SID_LIST = (SID_DESC = (GLOBAL_DBNAME = ORCL) (ORACLE_HOME = /u01/app/oracle/product/11.2.0/dbhome_1) (SID_NAME = ORCL) ) ) SID_LIST_LISTENER2 = (SID_LIST = (SID_DESC = (GLOBAL_DBNAME = orcl) (ORACLE_HOME = /u01/app/oracle/product/11.2.0/dbhome_1) (SID_NAME = ORCL) ) ) ADR_BASE_LISTENER2 = /u01/app/oracle LISTENER = (DESCRIPTION_LIST = (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = dg1)(PORT = 1521)) ) (DESCRIPTION = (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521)) ) ) ADR_BASE_LISTENER = /u01/app/oracle 修改主机名dg1 为dg2 [root@dg2 ~]# cat /u01/app/oracle/product/11.2.0/dbhome_1/network/admin/listener.ora # listener.ora Network Configuration File: /u01/app/oracle/product/11.2.0/dbhome_1/network/admin/listener.ora # Generated by Oracle configuration tools. LISTENER2 = (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = dg2)(PORT = 1522)) ) SID_LIST_LISTENER = (SID_LIST = (SID_DESC = (GLOBAL_DBNAME = ORCL) (ORACLE_HOME = /u01/app/oracle/product/11.2.0/dbhome_1) (SID_NAME = ORCL) ) ) SID_LIST_LISTENER2 = (SID_LIST = (SID_DESC = (GLOBAL_DBNAME = orcl) (ORACLE_HOME = /u01/app/oracle/product/11.2.0/dbhome_1) (SID_NAME = ORCL) ) ) ADR_BASE_LISTENER2 = /u01/app/oracle LISTENER = (DESCRIPTION_LIST = (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = dg2)(PORT = 1521)) ) (DESCRIPTION = (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521)) ) ) ADR_BASE_LISTENER = /u01/app/oracle
At this point in listening to successful start
[oracle@dg2 admin]$ lsnrctl start LSNRCTL for Linux: Version 11.2.0.4.0 - Production on 23-DEC-2016 12:31:40 Copyright (c) 1991, 2013, Oracle. All rights reserved. Starting /u01/app/oracle/product/11.2.0/dbhome_1/bin/tnslsnr: please wait... TNSLSNR for Linux: Version 11.2.0.4.0 - Production System parameter file is /u01/app/oracle/product/11.2.0/dbhome_1/network/admin/listener.ora Log messages written to /u01/app/oracle/diag/tnslsnr/dg2/listener/alert/log.xml Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=dg2)(PORT=1521))) Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1521))) Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=dg2)(PORT=1521))) STATUS of the LISTENER ------------------------ Alias LISTENER Version TNSLSNR for Linux: Version 11.2.0.4.0 - Production Start Date 23-DEC-2016 12:31:41 Uptime 0 days 0 hr. 0 min. 0 sec Trace Level off Security ON: Local OS Authentication SNMP OFF Listener Parameter File /u01/app/oracle/product/11.2.0/dbhome_1/network/admin/listener.ora Listener Log File /u01/app/oracle/diag/tnslsnr/dg2/listener/alert/log.xml Listening Endpoints Summary... (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=dg2)(PORT=1521))) (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1521))) Services Summary... Service "ORCL" has 1 instance(s). Instance "ORCL", status UNKNOWN, has 1 handler(s) for this service... The command completed successfully [oracle@dg2 admin]$ lsnrctl start LSNRCTL for Linux: Version 11.2.0.4.0 - Production on 23-DEC-2016 12:32:03 Copyright (c) 1991, 2013, Oracle. All rights reserved. TNS-01106: Listener using listener name LISTENER has already been started