Weblogic CGIServlet NoClassDefFoundError - cgi

Question

I'm trying to configure CGI Servlet in weblogic. I have a simple war to test it. I have nothing special in web.xml, just a simple config:
<servlet>
<servlet-name>CGIServlet</servlet-name>
<servlet-class>weblogic.servlet.CGIServlet</servlet-class>
<init-param>
<param-name>cgiDir</param-name>
<param-value>/tmp/scripts</param-value>
</init-param>
<init-param>
<param-name>*.py</param-name>
<param-value>/usr/bin/python</param-value>
</init-param>
</servlet>
<servlet-mapping>
<servlet-name>CGIServlet</servlet-name>
<url-pattern>/config/*</url-pattern>
</servlet-mapping>
and in server.xml
<prefer-web-inf-classes>false</prefer-web-inf-classes>
When I try to access localhost/cgitest/config/test.py
I'm getting an exception in logs of the server:
java.lang.NoClassDefFoundError: Could not initialize class weblogic.servlet.Env
at weblogic.servlet.CGIServlet.init(CGIServlet.java:72)
As I see, weblogic.servlet.Env is a part of weblogic.jar and it is present in the lib folder of the server. Maybe the server is somehow misconfigured. (WebLogic Server Version: 12.1.1.0)
I would appreciate any hints on finding the issue behind this. Thanks.

Answer 1

Just for the sake of the completeness. When you request the CGIServlet for the first time (e.g. GET /cgi-bin/hello-world.sh), you will see an exception like this one:
java.lang.UnsatisfiedLinkError: /home/lurodrig/development/servers/wls1221/wls12210/wlserver/server/native/linux/x86_64/libwlenv.so: libstdc++.so.5: cannot open shared object file: No such file or directory
Installing that library solves the issue. E.g. in ubuntu $sudo apt-get install libstdc++5
<CGIServletSH: Exec script with args :[/bin/sh, /tmp/cgi-bin/hello-world.sh]>
Hope it helps,
Luis
BTW: thanks #damian for the hint about the C library