Oracle have killed off blogs.sun.com. You have a number of questions/answers that have links to blogs.sun.com that will need fixing.

Here's the list

In general you just need to change the http://blogs.sun.com to https://blogs.oracle.com.

I have found (whilst working through the Serverfault list) that some new links are dead, presumably because the blog owner no longer works for Oracle so they need to be dealt with on a case by case basis.

Have fun.