Question

I installed cx_Oracle on CentOS 6.2. When I import the library from the shell, it works fine but when I launch it through wsgi, I get the error :

ImportError: libclntsh.so.10.1: cannot open shared object file: No such file or directory

This is an environment variable problem : cx_Oracle does not find the path to the lib.

I have tried the solutions provided here

I have added a link to libclntsh.so.10.1 (with ln) in the /usr/lib directory

I have edited apache configuration and added :

ORACLE_HOME=/usr/lib/oracle/11.2/client64/lib
LD_LIBRARY_PATH=$ORACLE_HOME/
PATH=$ORACLE_HOME/bin:$PATH

I edited /etc/ld.so.conf and added :

/usr/lib/oracle/11.2/client64/lib

done after ldconfig

I tried to use python with :

os.env['ORACLE_HOME']='/usr/lib/oracle/11.2/client64/lib'

I edited the bashrc with :

export ORACLE_HOME=/usr/lib/oracle/11.2/client64/lib
export LD_LIBRARY_PATH=$ORACLE_HOME/
export PATH=$ORACLE_HOME/bin:$PATH

I also edited apachectl with

ORACLE_HOME=/usr/lib/oracle/11.2/client64/lib
export ORACLE_HOME
LD_LIBRARY_PATH=$ORACLE_HOME/
export LD_LIBRARY_PATH
PATH=$ORACLE_HOME/bin:$PATH
export PATH

I am running out of ideas. Any suggestions ?

Answer 1

Instead of using yum install on the cx_Oracle rpm, I downloaded the source of the library and run the setup.py build.

I got an error that would point me to the function that was trying to locate the instant client sdk libraries in :

possibleIncludeDirs = ["rdbms/demo", "rdbms/public", "network/public","sdk/include"]

Browsing the Oracle_home folder, i discovered that the sdk file where installed in the lib folder ( I installed the skd using yum install on the rpm from oracle ) and not in the possibleIncludeDirs or in an include folder as suggested in the setup.py :

if not includeDirs:
        path = os.path.join(oracleLibDir, "include")
        if os.path.isdir(path):
            includeDirs.append(path)
    if not includeDirs:
        path = re.sub("lib(64)?", "include", oracleHome)
        if os.path.isdir(path):
            includeDirs.append(path)

I downloaded the instant client sdk (the zip file this time) and unziped it to the lib folder.

There was then a sdk folder in the lib folder (/usr/lib/oracle/11.2/client64/lib)

I then launched the setup.py build and setup.py install and it worked.