Oracle数据库的sqlplus无响应挂起处理，网上查看资料得知是oracle的bug引起的，事实上只要Linux x86主机运行天数是24.8的倍数都有可能引发该bug，因为time()函数值为null，造成无限死循环，从而耗尽cpu。接下来我们介绍一下解决办法。
解决办法三种：
1) 重启主机；
2) 打patch set，如升级到10.2.0.4；
3) 对该bug单独打临时patch 4612267。
第一种方法没有彻底解决问题，以后照旧；第二种方法，升级时间长，且要求停库很久，当前生产环境暂不适合；
参考文档：
Doc ID: 338461.1 SQL*Plus 10.2.0.1 Hangs, When System Uptime Is Long Period of Time
Doc ID: 4612267.8 Bug 4612267 - OCI client spins when machine uptime >= 249 days
我采取的是第三种方法，打补丁包的方式。而且据oracle官方文档说明，oracle11已经修复该问题。
下面是pache 4612267补丁包的安装及验证方法：
先停监听、dbconsole和数据库
$ lsnrctl stop
$ emctl stop dbconsole
$ sqlplus / as sysdba
SQL> shutdown immediate
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注意：dbconsole是在已经装了Oracle EM的情况下要停止，如果未安装则无需干涉。
安装patch
$ mkdir $ORACLE_BASE/patches
$ cd $ORACLE_BASE/patches
$ rz (SecureCRT里上传 p4612267_10201_LINUX.zip 文件, 其它上传方式也可以)
$ unzip p4612267_10201_LINUX.zip
$ cd 4612267/
$ $ORACLE_HOME/OPatch/opatch apply
Invoking OPatch 10.2.0.1.0
...
Please shutdown Oracle instances running out of this ORACLE_HOME on the local system.
(Oracle Home = '/u01/app/oracle/product/10.2.0/db_1')
Is the local system ready for patching?
Do you want to proceed? [y|n]
y (此处输入y)
User Responded with: Y
...
ApplySession adding interim patch '4612267' to inventory
The local system has been patched and can be restarted.
OPatch succeeded.
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验证patch
$ $ORACLE_HOME/OPatch/opatch lsinventory
Invoking OPatch 10.2.0.1.0
Oracle interim Patch Installer version 10.2.0.1.0
Copyright (c) 2005, Oracle Corporation. All rights reserved..
Oracle Home : /u01/app/oracle/product/10.2.0/db_1
Central Inventory : /u01/app/oracle/oraInventory
from : /u01/app/oracle/product/10.2.0/db_1/oraInst.loc
OPatch version : 10.2.0.1.0
OUI version : 10.2.0.1.0
OUI location : /u01/app/oracle/product/10.2.0/db_1/oui
Log file location : /u01/app/oracle/product/10.2.0/db_1/cfgtoollogs/opatch/opatch-2009_Jan_13_11-06-27-HKT_Tue.log
Lsinventory Output file location : /u01/app/oracle/product/10.2.0/db_1/cfgtoollogs/opatch/lsinv/lsinventory-2009_Jan_13_11-06-27-HKT_Tue.txt
--------------------------------------------------------------------------------
Installed Top-level Products (2):
Oracle Database
10g 10.2.0.1.0
Oracle Database 10g Products 10.2.0.1.0
There are 2 products installed in this Oracle Home.
Interim patches (1) :
Patch 4612267 : applied on Tue Jan 13 11:05:10 HKT 2009
Created on 5 Oct 2005, 13:48:00 hrs US/Pacific
Bugs fixed:
4612267
--------------------------------------------------------------------------------
OPatch succeeded.
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启动数据库、监听和dbconsole
$ sqlplus / as sysdba
SQL> startup
$ lsnrctl start
$ emctl start dbconsole
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如果有需要，还可以删除patch，删除前先停库
$ cd $ORACLE_BASE/patches/4612267
$ $ORACLE_HOME/OPatch/opatch rollback -id 4612267
Invoking OPatch 10.2.0.1.0
...
Please shutdown Oracle instances running out of this ORACLE_HOME on the local system.
(Oracle Home = '/u01/app/oracle/product/10.2.0/db_1')
Is the local system ready for patching?
Do you want to proceed? [y|n]
y (此处输入y)
User Responded with: Y
...
RollbackSession removing interim patch '4612267' from inventory
The local system has been patched and can be restarted.
OPatch succeeded.
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此时再执行上面的验证patch命令就会发现该patch已经删除了。
注：
Running STRACE tool shows:
$ strace /oracle/home/bin/sqlplus -V 2>&1 |less
......
old_mmap(NULL, 385024, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x41794000
gettimeofday({1122996561, 411035}, NULL) = 0
access("/usr/local/UD/conf/sqlnet.ora", F_OK) = -1 ENOENT (No such file or directory)
access("/usr/local/UD/lib/oracle/network/admin/sqlnet.ora", F_OK) = -1 ENOENT (No such file or directory)
access("/usr/local/UD/conf/sqlnet.ora", F_OK) = -1 ENOENT (No such file or directory)
access("/usr/local/UD/lib/oracle/network/admin/sqlnet.ora", F_OK) = -1 ENOENT (No such file or directory)
fcntl64(-1218313656, F_SETFD, FD_CLOEXEC) = -1 EBADF (Bad file descriptor)
It is looping on the times() function.--死循环中
times(NULL) = -1825782405
times(NULL) = -1825782405
times(NULL) = -1825782405
times(NULL) = -1825782405
times(NULL) = -1825782405
times(NULL) = -1825782405
times(NULL) = -1825782405
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关于Linux下sqlplus没有反应的问题就介绍到这里了，希望通过本次的介绍能够带给您一些收获！
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