Installation

[Zoe_Ward]

I am using a server that is running java 8 (I have been told I cannot update to java 11). The installation docs say # Make sure that Java v8+ is installed: However when I try to install I get the following:

[zwar806@Workstation ~]$ curl -fsSL get.nextflow.io | bash
NOTE: Nextflow is not tested with Java 1.8.0_342 -- It's recommended the use of version 11 up to 21Error: A JNI error has occurred, please check your installation and try again
Exception in thread "main" java.lang.UnsupportedClassVersionError: nextflow/cli/Launcher has been compiled by a more recent version of the Java Runtime (class file version 55.0), this version of the Java Runtime only recognizes class file versions up to 52.0
        at java.lang.ClassLoader.defineClass1(Native Method)
        at java.lang.ClassLoader.defineClass(ClassLoader.java:756)
        at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
        at java.net.URLClassLoader.defineClass(URLClassLoader.java:473)
        at java.net.URLClassLoader.access$100(URLClassLoader.java:74)
        at java.net.URLClassLoader$1.run(URLClassLoader.java:369)
        at java.net.URLClassLoader$1.run(URLClassLoader.java:363)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:362)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:418)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:352)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:351)
        at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:601)

[ewels (Phil Ewels)]

Hi @Zoe_Ward,

Apologies, that documentation on the nf-core website is outdated. Java 11 is now required, see the main Nextflow installation docs.

Phil

[ewels (Phil Ewels)]

I opened a pull-request to update the nf-core docs here:

Nextflow needs Java 11+ now