晚上给几个测试库打补丁，停完监听和实例后查看已经没有Oracle的进程了，于是执行opatch apply。但执行报如下错误：

$ opatch apply
Oracle Interim Patch Installer version 11.2.0.3.12
Copyright (c) 2017, Oracle Corporation.  All rights reserved.Oracle Home       : /opt/oracle/app/oracle/product/11.2.4/db_1
Central Inventory : /opt/oracle/app/oracle/oraInventoryfrom           : /opt/oracle/app/oracle/product/11.2.4/db_1/oraInst.loc
OPatch version    : 11.2.0.3.12
OUI version       : 11.2.0.4.0
Log file location : /opt/oracle/app/oracle/product/11.2.4/db_1/cfgtoollogs/opatch/opatch2017-03-29_00-16-10AM_1.logVerifying environment and performing prerequisite checks...
Prerequisite check "CheckActiveFilesAndExecutables" failed.
The details are:Following executables are active :
/opt/oracle/app/oracle/product/11.2.4/db_1/lib/libclntsh.so.11.1
UtilSession failed: Prerequisite check "CheckActiveFilesAndExecutables" failed.
Log file location: /opt/oracle/app/oracle/product/11.2.4/db_1/cfgtoollogs/opatch/opatch2017-03-29_00-16-10AM_1.log

Oracle的相关进程已经没有了

[bbtst3s oracle@tst3 /home/oracle]
$ ps -ef |grep oraoracle  8608  8606  0 02:04:59 ?         0:00 sshd: oracle@pts/2oracle  8796 19274  0 02:05:24 ?         0:00 sleep 15oracle 19274     1  3  Dec 20  ?        967:38 /bin/sh ./OSWatcher.sh 15 192oracle  8825  8610  0 02:05:35 pts/2     0:00 grep oraoracle  8668 19319  0 02:05:03 ?         0:00 sleep 60oracle  8824  8610  2 02:05:35 pts/2     0:00 ps -eforacle  8610  8608  0 02:04:59 pts/2     0:00 -kshoracle 19319 19274  0  Dec 20  ?        23:31 /bin/sh ./OSWatcherFM.sh 192 /opt/bboss/tst3/oracle/arch/oswatcher/oswbb/archiveroot  8606 21662  0 02:04:56 ?         0:00 sshd: oracle [priv]

于是使用fuser查看

$ fuser /opt/oracle/app/oracle/product/11.2.4/db_1/lib/libclntsh.so.11.1
/opt/oracle/app/oracle/product/11.2.4/db_1/lib/libclntsh.so.11.1:    29888m

看到文件确实被占用了，但不知道是被哪个进程占用的，再使用lsof命令

$ ./lsof /opt/oracle/app/oracle/product/11.2.4/db_1/lib/libclntsh.so.11.1

执行完后没有结果，这就没办法查了。

于是请教了同事，他用使用root用户去执行lsof命令，而且只指定到最上一层的目录去查

# lsof /opt
COMMAND     PID     USER   FD   TYPE DEVICE  SIZE/OFF   NODE NAME
RaterServ 29888    rate3  mem    REG 64,0x6  10800648  85874 /opt/oracle/app/oracle/product/11.2.4/db_1/lib/libnnz11.so
RaterServ 29888    rate3  mem    REG 64,0x6 121875400 324102 /opt/oracle/app/oracle/product/11.2.4/db_1/lib/libclntsh.so.11.1

从上面的输出结果可以看出来确实是有进程在占用，进程号是29888。

再查29888对就的进程名

# ps -ef |grep 29888

找到是应用的一个服务，与测试沟通后，这个进程可以直接kill，于是

kill -9 29888

再次执行opatch apply成功。