Tomcat takes forever to start, what can I do?

Normally, when the only application that is running in it is Artifactory, Tomcat will start within 10-40 seconds. 

If your Tomcat takes longer to start, it may be due to the random number generator that it is using. You might want to consider forcing it to use ‘/dev/urandom’ rather than the default ‘/dev/random’ that Tomcat uses. 

‘/dev/random’ is a random number generator often used to seed cryptographic functions for better security.  

‘/dev/urandom’ likewise is a (pseudo) random number generator.  Both are good at generating random numbers.  The key difference is that ‘/dev/random’ has a blocking function that waits until entropy reaches a certain level before providing its result.  From a practical standpoint, this means that programs using ‘/dev/random’ will generally take longer to complete than ‘/dev/urandom’.


In order to force Tomcat to use ‘/dev/urandom’ just add -Djava.security.egd=file:/dev/./urandom to the JAVA_OPTS parameter on the startup script.