OSX: The Apache Tomcat Native library... was not found on the java.library.path

Here's how to get rid of the log message-- INFO: The Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path when you startup Tomcat on OSX. On Windows, all one needs to do is drop in a precompiled dll, on OSX there are a few more steps...

Overview

1. Build and install OpenSSL
2. Build and install Apache Portable Runtime (APR)
3. Build and install Tomcat Native Wrapper

OpenSSL

1. Download the latest tarball (version at the time of this writing, openssl-0.9.8g)
2. Extract source (geshifilter-codetar zxvf openssl-0.9.8g.tar.gz/geshifilter-code)
3. Compile and install:

cd openssl-0.9.8g
./config
make
sudo make install

APR

1. Download the latest tarball (version at the time of this writing, apr-1.2.12)
2. Extract source (geshifilter-codetar zxvf apr-1.2.12.tar.gz/geshifilter-code)
3. Compile and install:

cd apr-1.2.12
./configure
make
sudo make install

Tomcat Native Wrapper

1. Use the version in $CATALINA_HOME/bin/tomcat-native.tar.gz OR download the latest tarball (version at the time of this writing, tomcat-native-1.1.13
2. Extract source (geshifilter-codetar zxvf tomcat-native.tar.gz/geshifilter-code or geshifilter-codetar zxvf tomcat-native-1.1.13-src.tar.gz/geshifilter-code)
3. Compile and install:

./configure --with-apr=/usr/local/apr --with-java-home=/System/Library/Frameworks/JavaVM.framework/Versions/CurrentJDK/Home --libdir=/usr/lib/java --prefix=/usr/lib/java --with-ssl=/usr/local/ssl
make
sudo make install
cd /usr/lib/java
sudo ln -s libtcnative-1.dylib libtcnative-1.jnilib

End Result

If you did everything correctly, the original info message should go away and you should see something like this in the log:

Feb 18, 2008 2:14:56 PM org.apache.coyote.http11.Http11AprProtocol init
INFO: Initializing Coyote HTTP/1.1 on http-8080

In addition to the performance benefits, you also get a couple of more features from tomcat:

• Secure session ID generation by default on all platforms
• OS level statistics on memory and CPU usage are displayed by the status servlet (in the manager app)