TNS-12542: TNS:address already in use

研发说无法访问数据库，数据库正常运行，那就可能是监听有问题，
一波简单操作搞定。

[oracle@entegor-1 ~]$ lsnrctl startLSNRCTL for Linux: Version 11.2.0.4.0 - Production on 17-AUG-2018 09:04:01Copyright (c) 1991, 2013, Oracle.  All rights reserved.Starting /oracle/app/oracle/11.2.0/db_1/bin/tnslsnr: please wait...TNSLSNR for Linux: Version 11.2.0.4.0 - ProductionLog messages written to /oracle/app/oracle/diag/tnslsnr/entegor-1/listener/alert/log.xmlError listening on: (ADDRESS=(PROTOCOL=tcp)(HOST=)(PORT=1521))TNS-12542: TNS:address already in use TNS-12560: TNS:protocol adapter error  TNS-00512: Address already in use   Linux Error: 98: Address already in useListener failed to start. See the error message(s) above...[root@entegor-1 ~]# su - grid[grid@entegor-1 ~]$ lsnrctl statusLSNRCTL for Linux: Version 11.2.0.4.0 - Production on 17-AUG-2018 09:03:32Copyright (c) 1991, 2013, Oracle.  All rights reserved.Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=LISTENER)))STATUS of the LISTENER------------------------Alias                     LISTENERVersion                   TNSLSNR for Linux: Version 11.2.0.4.0 - ProductionStart Date                31-JAN-2018 11:17:57Uptime                    197 days 21 hr. 45 min. 34 secTrace Level               offSecurity                  ON: Local OS AuthenticationSNMP                      OFFListener Parameter File   /oracle/app/11.2.0/grid/network/admin/listener.oraListener Log File         /oracle/app/grid/diag/tnslsnr/entegor-1/listener/alert/log.xmlListening Endpoints Summary...  (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=LISTENER)))  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=6.1.14.125)(PORT=1521)))Services Summary...Service "+ASM" has 1 instance(s).  Instance "+ASM1", status READY, has 1 handler(s) for this service...The command completed successfully[grid@entegor-1 ~]$ lsnrctl stopLSNRCTL for Linux: Version 11.2.0.4.0 - Production on 17-AUG-2018 09:04:16Copyright (c) 1991, 2013, Oracle.  All rights reserved.Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=LISTENER)))The command completed successfully[grid@entegor-1 ~]$ exitlogout[root@entegor-1 ~]# su - oracle[oracle@entegor-1 ~]$ lsnrctl startLSNRCTL for Linux: Version 11.2.0.4.0 - Production on 17-AUG-2018 09:04:25Copyright (c) 1991, 2013, Oracle.  All rights reserved.Starting /oracle/app/oracle/11.2.0/db_1/bin/tnslsnr: please wait...TNSLSNR for Linux: Version 11.2.0.4.0 - ProductionLog messages written to /oracle/app/oracle/diag/tnslsnr/entegor-1/listener/alert/log.xmlListening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=entegor-1)(PORT=1521)))Connecting to (ADDRESS=(PROTOCOL=tcp)(HOST=)(PORT=1521))STATUS of the LISTENER------------------------Alias                     LISTENERVersion                   TNSLSNR for Linux: Version 11.2.0.4.0 - ProductionStart Date                17-AUG-2018 09:04:25Uptime                    0 days 0 hr. 0 min. 1 secTrace Level               offSecurity                  ON: Local OS AuthenticationSNMP                      OFFListener Log File         /oracle/app/oracle/diag/tnslsnr/entegor-1/listener/alert/log.xmlListening Endpoints Summary...  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=entegor-1)(PORT=1521)))The listener supports no servicesThe command completed successfully[oracle@entegor-1 ~]$ lsnrctl statusLSNRCTL for Linux: Version 11.2.0.4.0 - Production on 17-AUG-2018 09:14:12Copyright (c) 1991, 2013, Oracle.  All rights reserved.Connecting to (ADDRESS=(PROTOCOL=tcp)(HOST=)(PORT=1521))STATUS of the LISTENER------------------------Alias                     LISTENERVersion                   TNSLSNR for Linux: Version 11.2.0.4.0 - ProductionStart Date                17-AUG-2018 09:04:25Uptime                    0 days 0 hr. 9 min. 46 secTrace Level               offSecurity                  ON: Local OS AuthenticationSNMP                      OFFListener Log File         /oracle/app/oracle/diag/tnslsnr/entegor-1/listener/alert/log.xmlListening Endpoints Summary...  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=entegor-1)(PORT=1521)))Services Summary...Service "+ASM" has 1 instance(s).  Instance "+ASM1", status READY, has 1 handler(s) for this service...Service "entegor" has 1 instance(s).  Instance "entegor1", status READY, has 2 handler(s) for this service...Service "entegorXDB" has 1 instance(s).  Instance "entegor1", status READY, has 1 handler(s) for this service...The command completed successfully[oracle@entegor-1 ~]$