> It needs a specific version: 1.8. Wait a minute, WTF? Java is at like v14 now, or something, right? There was a compatibility break between Java 1.8 and Java

> It needs a specific version: 1.8. Wait a minute, WTF? Java is at like v14 now, or something, right? There was a compatibility break between Java 1.8 and Java 9 (the version number also lost the prefix at the same time, Java 1.8 can be thought of as "Java 8"). It was not as big as the change from Python 2 to Python 3, but a lot of software needed changes to not break; as late as last year, I was still seeing Java libraries adding fixes for compatibility with Java 9. If your software depends on libraries which have not yet been upgraded to work with Java 9, you have to require Java 8 (that is, Java 1.8). It doesn't help that, even today, the default version of Java in some major Linux distributions is Java 1.8, so not only that's a good reason to keep compatibility with Java 8, but also it means that there's a good chance that the server already has Java 1.8 installed. (In a not so distant future, however, these major Linux distributions will probably have Java 11 as the default version; the next long-term stable Java version after Java 11 is probably going to be Java 17, so you are going to see many software require Java 11 for a while, and later Java 17.)