在自己的虚拟机的做实验，突然发现使用PL/SQL Developer无法连接到数据库，报错ORA-12514，说是监听没有启动。
先介绍虚拟机一下环境：RedHat7.2+GI 12.2.0.1+Oracle 12.2.0.1，为了测试12.2的ASM特性安装了GI。平时监听程序默认是开启启动的。但是今天不知道为什么没有启动。使用crsctl查看资源状态：发现监听的状态确实是OFFLINE状态
[root@rhel7 .oracle]# crsstat
--------------------------------------------------------------------------------
Name Target State Server State details
--------------------------------------------------------------------------------
Local Resources
--------------------------------------------------------------------------------
ora.DATA.dg
ONLINE ONLINE rhel7 STABLE
ora.LISTENER.lsnr
ONLINE OFFLINE rhel7 STABLE
ora.asm
ONLINE ONLINE rhel7 Started,STABLE
ora.ons
OFFLINE OFFLINE rhel7 STABLE
--------------------------------------------------------------------------------
Cluster Resources
--------------------------------------------------------------------------------
ora.cssd
1 ONLINE ONLINE rhel7 STABLE
ora.diskmon
1 OFFLINE OFFLINE STABLE
ora.driver.afd
1 ONLINE ONLINE rhel7 STABLE
ora.evmd
1 ONLINE ONLINE rhel7 STABLE
ora.ora12c.db
1 ONLINE ONLINE rhel7 Open,HOME=/u01/app/o
racle/product/12.2/d
b_home1,STABLE
--------------------------------------------------------------------------------
尝试手动启动监听，依然报错：
[grid@rhel7 ~]$ srvctl start listener
PRCR-1079 : Failed to start resource ora.LISTENER.lsnr
CRS-5016: Process "/u01/app/grid/bin/lsnrctl" spawned by agent "ORAAGENT" for action "start" failed: details at "(:CLSN00010:)" in "/u01/app/12.2/grid/diag/crs/rhel7/crs/trace/ohasd_oraagent_grid.trc"
CRS-5016: Process "/u01/app/grid/bin/lsnrctl" spawned by agent "ORAAGENT" for action "start" failed: details at "(:CLSN00010:)" in "/u01/app/12.2/grid/diag/crs/rhel7/crs/trace/ohasd_oraagent_grid.trc"
CRS-2674: Start of 'ora.LISTENER.lsnr' on 'rhel7' failed
根据提示查看trc文件，看到如下报错：
LSNRCTL for Linux: Version 12.2.0.1.0 - Production on 15-NOV-2017 20:03:28
Copyright (c) 1991, 2016, Oracle. All rights reserved.
Starting /u01/app/grid/bin/tnslsnr: please wait...
TNSLSNR for Linux: Version 12.2.0.1.0 - Production
System parameter file is /u01/app/grid/network/admin/listener.ora
Log messages written to /u01/app/12.2/grid/diag/tnslsnr/rhel7/listener/alert/log.xml
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=rhel7)(PORT=1521)))
Error listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC1521)))
TNS-12555: TNS:permission denied
TNS-12560: TNS:protocol adapter error
TNS-00525: Insufficient privilege for operation
Linux Error: 1: Operation not permitted
Listener failed to start. See the error message(s) above...