It's not a Linux issue. People almost always install the Oracle JVM themselves rather than using a package manager (it's a long story...) The desire for a sin

It's not a Linux issue. People almost always install the Oracle JVM themselves rather than using a package manager (it's a long story...) The desire for a single JVM comes partly from the architecture of Hadoop itself. Hadoop is structured as a framework (you give your MR job to YARN and it runs it by creating new JVMs for you). The Java standard library is weak in many areas. The "write once, run anywhere" ideology is part of it, but there are also just... weak parts.