oracle中log.xml报错信息

TNS-12505: TNS:listener does not currently know of SID given in connect descriptor

plsql登录报错信息：

无法请求描述符中的服务

百度了很多，都是一种处理方法，可是对我这里完全不管用，下面是我遇到的两次异常的解决方法：

1、看/u01/app/oracle/product/11.2.0/dbhome_1/network/admin/listener.ora这个配置文件

# listener.ora Network Configuration File: /u01/app/oracle/product/11.2.0/dbhome_1/network/admin/listener.ora

# Generated by Oracle configuration tools.

LISTENER =

  (DESCRIPTION_LIST =

    (DESCRIPTION =

      (ADDRESS = (PROTOCOL = TCP)(HOST = 10.23.*.55)(PORT = 1521))

      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))

    )

  )

ADR_BASE_LISTENER = /u01/app/oracle

标红处之前是localhost,可是主机名已经不是这个了，就改成主机IP或现在的主机名，成功处理问题。

2、上面处理方法已经不管用，报错信息还是一样，

最终发现是/etc/hosts这个配置文件

[oracle@esboracle55 admin]$ cat /etc/hosts

127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4

::1         localhost localhost.localdomain localhost6 localhost6.localdomain6

#192.168.67.236 localhost.localdomain

#127.0.0.1esboracle55

10.230.*.* esboracle55

标红处注释掉，就成功的解决了问题。

可能存在SID的文件

tnsname.ora

listerner,ora

profile

[root@esboracle55 admin]# su - oracle

[oracle@esboracle55 ~]$ cat .bash_profile 

# .bash_profile

# Get the aliases and functions

if [ -f ~/.bashrc ]; then

. ~/.bashrc

fi

# User specific environment and startup programs

PATH=$PATH:$HOME/bin

export PATH

#use_for_oracle

export ORACLE_BASE=/u01/app/oracle

export ORACLE_SID=orcl

#export ogg=/oracle/ogg

#export JAVA_HOME=/ora_bck/java/jdk1.6.0_32

#export CLASSPATH=/lib/dt.jar:/lib/tools.jar

export ORACLE_HOME=$ORACLE_BASE/product/11.2.0/dbhome_1

export PATH=$PATH:$ORACLE_HOME/bin:$ORACLE_HOME/OPatch:/usr/ccs/bin:/bin

export LD_LIBRARY_PATH=$ORACLE_HOME/lib:/lib:/usr/lib

export ORACLE_TERM=xterm

export LD_LIBRARY_PATH=$ORACLE_HOME/lib:/lib:/usr/lib:/lib64:/usr/lib64

export NLS_DATE_FORMAT="YYYY-MM-DD HH24:MI:SS"

export NLS_LANG=AMERICAN_AMERICA.AL32UTF8;

export PS1='[\u@\h \W]\$ ';  # default value