Sent: Monday, December 13, 2021 at 12:18 AM From: "Gerben Wierda"
> Which means that MacPorts solr8 runs using macOS native java and not one from > MacPorts itself. I thought the MacPorts stuff was supposed to be fully > independent (except for Xcode). The JDK ports are an exception in that they install to the usual system-wide location of /Library/Java/JavaVirtualMachines rather than in the MacPorts prefix. Presumably this is an unavoidable requirement for them to be usable system-wide on macOS. > $ java -version > java version "12.0.2" 2019-07-16 > Java(TM) SE Runtime Environment (build 12.0.2+10) > Java HotSpot(TM) 64-Bit Server VM (build 12.0.2+10, mixed mode, sharing) > > $ ls -l /usr/bin/java > lrwxr-xr-x 1 root wheel 74 Aug 10 2019 /usr/bin/java -> > /System/Library/Frameworks/JavaVM.framework/Versions/Current/Commands/java > > $ ls -l > /System/Library/Frameworks/JavaVM.framework/Versions/Current/Commands/java > -rwxr-xr-x 1 root wheel 58336 Jul 11 07:48 > /System/Library/Frameworks/JavaVM.framework/Versions/Current/Commands/java > > That java is starting to get old, the last update was the last Security > Update from macOS Mojave Your Java 12 installation comes from somewhere else. Apple has not shipped Java with/for macOS for a long time. The java, javac, etc. commands present in system paths are merely wrappers which require a separately-installed Java runtime to do anything useful. > I also have Oracle Java SE 8 installed: > > $ /Library/Internet\ Plug-Ins/JavaAppletPlugin.plugin/Contents/Home/bin/java > -version > java version "1.8.0_311" > Java(TM) SE Runtime Environment (build 1.8.0_311-b11) > Java HotSpot(TM) 64-Bit Server VM (build 25.311-b11, mixed mode) > > Basically, I am rather confused about java numbering. I know I have the > latest Oracle Java install and that my macOS Mojave version had its last > update in the summer of 2021. I am also somewhat confused about MacPorts > using the standard macOS Java which has a higher number but is an older > version. > > Can somebody enlighten me? macOS will reportedly pick the installation with the latest Java version, unless a specific Java version/installation is requested e.g. by the JAVA_HOME environment variable. > And shouldn’t ports that use java not depend on a java that comes with (old, > outdated) java’s in macOS? But install and use an open source version > instead? Or use the one from Oracle if available? Because JDK is not a lightweight dependency, it seems somewhat desirable for ports to be flexible when specifying a Java requirement, and allow using an already-installed JDK/JRE if compatible (including one not provided by MacPorts). The Java PortGroup allows specifying a required Java version (either a minimum version or an exact version), and a fallback JDK port to install if a compatible version isn’t already present (hopefully an LTS version: e.g. 8, 11, or 17 from OpenJDK; other vendors may have LTS for other versions). Christopher A. Chavez
