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Log4j exception FAQ: "How do I print the stack trace of an exception using Log4j or Commons Logging?"

Between utf8_general_ci and utf8_unicode_ci, are there any differences in terms of performance?

By default Tomcat's HTTP connector listens on port 8080. Changing to port 80 in Linux environment can be quite a tricky issue, since by default listening on any port under 1024 require a privileged user, and for security considerations it is not recommended to run Tomcat with elevated permissions. This article discusses how to use authbind to achieve this; it also describes the way all this configuration can be automated for the sake of the creation of a script which can be used to initialize a freshly installed Linux instance. This is especially advantageous on Amazon EC2, where we can use this init-script to initialize a fresh instance just launched from an AMI; and indeed, for the sake of this article Amazon's "Amazon Linux Image 1.0" was used for testing. Please note that this is a CentOS 6-based linux distribution, for other distributions there are slight changes, like replacing "sudo yum install tomcat7" with "sudo apt-get install tomcat7" o…

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