tnsping通过，但connect db遇ORA-12537 / ORA-12547 or TNS-12518问题处理

1、问题现象

      服务器端listener、instance运行均正常，在服务器本地通过sqlplus “/as sysdba”跳过listener可正常连接数据库，但是无论在服务器本地还是远程客户端，通过listener却无法成功，报“ORA-12537: TNS:connection closed“错误，listener log中也同步报TNS-12518:TNS:listener could not hand off client connection / TNS-12547: TNS:lost contact/ TNS-12560: TNS:protocol adapter error / TNS-00517: Lost contact / LinuxError: 32: Broken pipe。

2、问题诊断

（1）检查服务器listener.ora、sqlnet.ora配置文件均正常

（2）检查listener运行状态也为正常

[grid@nwydptdb01 ~]$ lsnrctl status   LSNRCTL for Linux: Version 11.2.0.4.0 - Production on 21-SEP-2015 20:12:07  Copyright (c) 1991, 2013, Oracle.  All rights reserved.   Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=LISTENER))) STATUS of the LISTENER ------------------------ Alias                     LISTENER Version                   TNSLSNR for Linux: Version 11.2.0.4.0 - Production Start Date                21-SEP-2015 19:51:42 Uptime                    0 days 0 hr. 20 min. 25 sec Trace Level               off Security                  ON: Local OS Authentication SNMP                      OFF Listener Parameter File   /u01/app/11.2.0/grid/network/admin/listener.ora Listener Log File         /u01/app/grid/diag/tnslsnr/nwydptdb01/listener/alert/log.xml Listening Endpoints Summary...   (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=LISTENER)))   (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=10.XX.XX.7)(PORT=11521)))   (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=10.XX.XX.9)(PORT=11521))) Services Summary... Service "mxxp" has 1 instance(s).   Instance "mxxp1", status READY, has 1 handler(s) for this service... Service "mxxpXDB" has 1 instance(s).   Instance "mxxp1", status READY, has 1 handler(s) for this service... The command completed successfully

（3）服务器端使用sqlplus “/as sysdba”可以正常登陆数据库

[oracle@nwydptdb01 ~]$ sqlplus "/as sysdba"   SQL*Plus: Release 11.2.0.4.0 Production on Mon Sep 21 20:12:51 2015  Copyright (c) 1982, 2013, Oracle.  All rights reserved.   Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production With the Partitioning, Real Application Clusters, Automatic Storage Management, OLAP, Data Mining and Real Application Testing options   SQL> select name from v$database;   NAME --------- MXXP   SQL> exit

 

（4）服务器端tnsping正常

[oracle@nwydptdb01 ~]$ tnsping mxxp   TNS Ping Utility for Linux: Version 11.2.0.4.0 - Production on 21-SEP-2015 20:13:14   Copyright (c) 1997, 2013, Oracle.  All rights reserved.   Used parameter files:   Used TNSNAMES adapter to resolve the alias Attempting to contact (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = 10.XX.XX.9)(PORT = 11521)) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = mxxp))) OK (0 msec)

 

（5）远程客户端tnsping也正常

C:\Users\Administrator>tnsping single   TNS Ping Utility for 64-bit Windows: Version 12.1.0.2.0 - Production on 21-9月 -2015 20:15:42   Copyright (c) 1997, 2014, Oracle.  All rights reserved.   已使用的参数文件: C:\oracle\client\Administrator\product\12.1.0\client_1\network\admin\sqlnet.ora    已使用 TNSNAMES 适配器来解析别名 尝试连接(DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = 10.XX.XX.9)(PORT = 11521)) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = mxxp))) OK (0 毫秒)

 

（6）服务器本地通过listener连接报ORA-12537: TNS:connection closed错误

[oracle@nwydptdb01 admin]$ sqlplus system/[email protected]:11521/mxxp   SQL*Plus: Release 11.2.0.4.0 Production on Mon Sep 21 19:55:40 2015   Copyright (c) 1982, 2013, Oracle.  All rights reserved.   ERROR: ORA-12537: TNS:connection closed

（7）远程客户端通过listener连接数据库报ORA-12537: TNS:connection closed错误

C:\Users\Administrator>sqlplus system/oracle@mxxp SQL*Plus: Release 11.2.0.1.0 Production on 星期一 9月 21 19:41:12 2015   Copyright (c) 1982, 2010, Oracle.  All rights reserved.   ERROR: ORA-12537: TNS: 连接关闭

（8）查看listener日志，同步报出TNS-12518 / TNS-12547 / TNS-12560 / TNS-00517

21-SEP-2015 20:02:49 * (CONNECT_DATA=(SERVER=DEDICATED)(SID=mxxp1)(CID=(PROGRAM=D:\app\Administrator\product\11.2.0\dbhome_1\bin\sqlplus.exe)(HOST=GH-PC)(USER=Administrator))) * (ADDRESS=(PROTOCOL=tcp)(HOST=10.4.36.186)(PORT=50384)) * establish * mxxp1 * 12518 TNS-12518: TNS:listener could not hand off client connection  TNS-12547: TNS:lost contact   TNS-12560: TNS:protocol adapter error    TNS-00517: Lost contact     Linux Error: 32: Broken pipe

 

3、原因分析

      上文中所列出现象，符合metalink上文档 ID1069517.1的“SYMPTOMS”中“listener_scann.log or listener.log”部分描述现象。

      检查$ORACLE_HOME/bin/oracle文件权限

[oracle@nwydptdb01 bin]$ ls -altr oracle -rwxr-s--x. 1 oracle asmdba 239810781 9月  10 17:55 oracle

    发现$ORACLE_HOME/bin/oracle文件的所属用户及组为oracle:asmdba，而权限为-rwxr-s—x,按照文章中说法，该权限是错误的，因为缺少suid（s）权限。

4、问题修复

修改$ORACLE_HOME/bin/oracle文件权限至具有s权限

[oracle@nwydptdb01 bin]$ chmod 6751 oracle [oracle@nwydptdb01 bin]$ ls -altr oracle -rwsr-s--x. 1 oracle asmdba 239810781 9月  10 17:55 oracle

 

重新通过listener连接数据库，问题解决。

 

本文作者：黎俊杰（网名：踩点），从事”系统架构、操作系统、存储设备、数据库、中间件、应用程序“六个层面系统性的性能优化工作

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