$ netca

Oracle Net Services Configuration:

JVMDG217: Dump Handler is Processing Signal 11 - Please Wait.

JVMDG303: JVM Requesting Java core file

JVMDG304: Java core file written to /u01/app/oracle/product/10.2.0/db_1/network/tools/javacore21130.1432714051.txt

JVMDG215: Dump Handler has Processed Exception Signal 11.

/u01/app/oracle/product/10.2.0/db_1/bin/netca[190]: 21130 Segmentation fault(coredump)

原因：hosts里面没有配置主机名

解决方法：vi /etc/hosts

在最下方添加 ip地址    主机名

修改后立即生效