事情的简单过程：

Oracle Net Services 配置:

#A fatal error has been detected by the Java Runtime Environment:

#SIGSEGV (0xb) at pc=0x00007f6968b44a15, pid=3248, tid=140092159522560

#JRE version: Java™ SE Runtime Environment (8.0_91-b14) (build 1.8.0_91-b14) #Java VM: Java HotSpot™ 64-Bit Server VM (25.91-b14 mixed mode linux-amd64 compressed oops) #Problematic frame: #C [libclntsh.so.12.1+0x5eca15] snlinGetAddrInfo+0x985

#Failed to write core dump. Core dumps have been disabled. To enable core dumping, try “ulimit -c unlimited” before starting Java again

#An error report file with more information is saved as: #…/network/tools/hs_err_pid3248.log

#If you would like to submit a bug report, please visit: #http://bugreport.java.com/bugreport/crash.jsp #The crash happened outside the Java Virtual Machine in native code. #See problematic frame for where to report the bug. #…/12.1.0/db_1/bin/netca: 行 179: 3248 已放弃 (吐核)$JRE $JRE_OPTIONS -classpath $CLASSPATH oracle.net.ca.NetCA $*

网上各种查，都没有解决，最后在友人提醒下，用netca /silent重新安装了一个监听，新监听一切正常后，回过来发现netca和dbca都正常了，删除新建的监听，原有的监听也能正常启动…

太混乱了…