You can add the 3rd party libraries in two ways:
1. With the latest release of Talend, they have deprecated the use of User libraries. So, now will have to make use of modules by downloading and installing them. To add modules, go to: Window > Show View > Talend > Modules.
All the external or 3rd party libraries can be easily managed from this window.
2. Another way to add 3rd party libraries is by using tLibraryLoad component in your job.
In order to remove the log exception, go to your Talend install path and look for the plugins directory. In this folder look for the apache logging jar files. Sometimes, because of this, you might get an exception.
Hope this helps!!