TNS-12547: TNS:lost contact问题的解决办法！

刚刚安装好的RAC one node 突然连不上数据库了。

检查CRS的状态：

[grid@Linux ~]$ srvctl status database -d ORCL

Database is not running.

[grid@Linux ~]$ crs_stat -t

Name Type Target State Host

------------------------------------------------------------

ora.DATA1.dg ora....up.type ONLINE ONLINE linux

ora....ER.lsnr ora....er.type ONLINE ONLINE linux

ora....R1.lsnr ora....er.type ONLINE UNKNOWN linux

ora.asm ora.asm.type ONLINE ONLINE linux

ora.cssd ora.cssd.type ONLINE ONLINE linux

ora.diskmon ora....on.type ONLINE ONLINE linux

ora.orcl.db ora....se.type ONLINE OFFLINE

ora....rcl.svc ora....ce.type ONLINE OFFLINE

数据库日志报如下错误：

Fatal NI connect error 12547, connecting to:

(DESCRIPTION=(ADDRESS=(PROTOCOL=beq)(PROGRAM=/oracle/app/grid/product/11.2.0/bin/oracle)(ARGV0=oracle+ASM_o001_orcl)(ENVS='ORACLE_HOME=/oracle/app/grid/product/11.2.0,ORACLE_SID=+ASM')(ARGS='(DESCRIPTION=(LOCAL=YES)(ADDRESS=(PROTOCOL=beq)))'))(enable=setuser)(CONNECT_DATA=(CID=(PROGRAM=oracle@Linux)(HOST=Linux)(USER=oracle))))

VERSION INFORMATION:

TNS for Linux: Version 11.2.0.1.0 - Production

Oracle Bequeath NT Protocol Adapter for Linux: Version 11.2.0.1.0 - Production

Time: 16-APR-2012 06:18:20

Tracing not turned on.

Tns error struct:

ns main err code: 12547

TNS-12547: TNS:lost contact

ns secondary err code: 12560

nt main err code: 517

TNS-00517: Lost contact

nt secondary err code: 32

怀疑是权限出了问题，REF：TNS-12518 Can Not Connect To RAC 11gR2 Database [ID 1088754.1]。

以grid用户查看+ASM的权限,发现如下结果：

-rwsr-s--x 1 oracle oinstall 176M Apr 15 07:53 oracle

修改权限：

[grid@Linux bin]$ chown grid:oinstall oracle

chown: changing ownership of `oracle': Operation not permitted

[grid@Linux bin]$ su root

Password:

[root@Linux bin]# chown grid:oinstall oracle

[root@Linux bin]# ls -lrth oracle

-rwxr-x--x 1 grid oinstall 176M Apr 15 07:53 oracle

[root@Linux bin]# chmod 6751 oracle

[root@Linux bin]# ls -lrth oracle

-rwsr-s--x 1 grid oinstall 176M Apr 15 07:53 oracle

[root@Linux bin]# exit

exit

[grid@Linux bin]$ id

uid=501(grid) gid=501(oinstall) groups=501(oinstall),502(dba),503(oper),504(asma

dmin),505(asmoper),506(asmdba)

[grid@Linux bin]$ sqlplus / as sysdba

SQL*Plus: Release 11.2.0.1.0 Production on Mon Apr 16 06:33:28 2012

Copyright (c) 1982, 2009, Oracle. All rights reserved.

Connected to an idle instance.

SQL> startup

ORACLE instance started.

Total System Global Area 1068937216 bytes

Fixed Size 2220200 bytes

Variable Size 297799512 bytes

Database Buffers 763363328 bytes

Redo Buffers 5554176 bytes

Database mounted.

Database opened.

SQL> SQL> exit

数据库恢复正常！

到底是什么原因导致原来的正常的数据库不正常了，目前还不是很清楚！

[oracle@Linux ~]$ sqlplus / as sysdba

SQL*Plus: Release 11.2.0.1.0 Production on Mon Apr 16 06:34:02 2012

Copyright (c) 1982, 2009, Oracle. All rights reserved.

Connected to an idle instance.

SQL> startup

ORACLE instance started.

Total System Global Area 1068937216 bytes

Fixed Size 2220200 bytes

Variable Size 297799512 bytes

Database Buffers 763363328 bytes

Redo Buffers 5554176 bytes

Database mounted.

Database opened.

SQL> SQL> exit