Re: groovyc stopped to compile Java after Big Sur update

[Nelson, Erick]

On big sur box, is java_home pointing to jre or jdk?

On 1/29/21, 8:47 AM, "o...@ocs.cz" <o...@ocs.cz> wrote:

    Hi there,

    I've got a project which uses both Groovy and Java sources. After Big Sur 
update -- without touching the project, it remained unchanged and does build 
perfectly on my other machine with a Catalina -- it reports “unable to locate 
the java compiler com.sun.tools.javac.Main, please change your classloader 
settings” and fails.

    I have absolutely no idea why and how should I “change my classloader 
settings” in this case? The project never changed, only the environment has 
(from Catalina to Big Sur), and it broke something :(

    Any idea what's the culprit and how to fix it?

    Thanks a lot!
    OC

    P.S. Here are details of the fail, it's very easy to repeat on the Big Sur 
machine:

    ===
    69 ocs /tmp> touch empty.java                    
    70 ocs /tmp> /usr/local/groovy-2.4.21/bin/groovyc -j empty.java  
    org.codehaus.groovy.control.MultipleCompilationErrorsException: startup 
failed:
    General error during semantic analysis: unable to locate the java compiler 
com.sun.tools.javac.Main, please change your classloader settings

    java.lang.ClassNotFoundException: unable to locate the java compiler 
com.sun.tools.javac.Main, please change your classloader settings
        at 
org.codehaus.groovy.tools.javac.JavacJavaCompiler.findJavac(JavacJavaCompiler.java:193)
        at 
org.codehaus.groovy.tools.javac.JavacJavaCompiler.compile(JavacJavaCompiler.java:53)
        at 
org.codehaus.groovy.tools.javac.JavaAwareCompilationUnit.gotoPhase(JavaAwareCompilationUnit.java:110)
        at 
org.codehaus.groovy.control.CompilationUnit.compile(CompilationUnit.java:589)
        at 
org.codehaus.groovy.control.CompilationUnit.compile(CompilationUnit.java:558)
        at 
org.codehaus.groovy.tools.FileSystemCompiler.compile(FileSystemCompiler.java:71)
        at 
org.codehaus.groovy.tools.FileSystemCompiler.doCompilation(FileSystemCompiler.java:227)
        at 
org.codehaus.groovy.tools.FileSystemCompiler.commandLineCompile(FileSystemCompiler.java:160)
        at 
org.codehaus.groovy.tools.FileSystemCompiler.commandLineCompileWithErrorHandling(FileSystemCompiler.java:190)
        at 
org.codehaus.groovy.tools.FileSystemCompiler.main(FileSystemCompiler.java:174)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at 
org.codehaus.groovy.tools.GroovyStarter.rootLoader(GroovyStarter.java:116)
        at org.codehaus.groovy.tools.GroovyStarter.main(GroovyStarter.java:138)

    1 error

    71 ocs /tmp> java -version
    java version "1.8.0_181"
    Java(TM) SE Runtime Environment (build 1.8.0_181-b13)
    Java HotSpot(TM) 64-Bit Server VM (build 25.181-b13, mixed mode)
    72 ocs /tmp> sw_vers    
    ProductName:        macOS
    ProductVersion:     11.1
    BuildVersion:       20C69
    73 ocs /tmp> 
    ===

    Perhaps worth mentioning a newer Groovy fails too, only with _considerably_ 
less friendly error report (bloody NPE is the worst thing ever):

    ===
    73 ocs /tmp> /usr/local/groovy-3.0.4/bin/groovyc -j empty.java 
    org.codehaus.groovy.control.MultipleCompilationErrorsException: startup 
failed:
    General error during semantic analysis: java.lang.NullPointerException

    java.lang.NullPointerException
        at 
org.codehaus.groovy.tools.javac.JavacJavaCompiler.doCompileWithSystemJavaCompiler(JavacJavaCompiler.java:95)
        at 
org.codehaus.groovy.tools.javac.JavacJavaCompiler.compile(JavacJavaCompiler.java:66)
        at 
org.codehaus.groovy.tools.javac.JavaAwareCompilationUnit.gotoPhase(JavaAwareCompilationUnit.java:119)
        at 
org.codehaus.groovy.control.CompilationUnit.compile(CompilationUnit.java:638)
        at 
org.codehaus.groovy.control.CompilationUnit.compile(CompilationUnit.java:606)
        at 
org.codehaus.groovy.tools.FileSystemCompiler.compile(FileSystemCompiler.java:311)
        at 
org.codehaus.groovy.tools.FileSystemCompiler.doCompilation(FileSystemCompiler.java:240)
        at 
org.codehaus.groovy.tools.FileSystemCompiler.commandLineCompile(FileSystemCompiler.java:165)
        at 
org.codehaus.groovy.tools.FileSystemCompiler.commandLineCompileWithErrorHandling(FileSystemCompiler.java:205)
        at 
org.codehaus.groovy.tools.FileSystemCompiler.main(FileSystemCompiler.java:189)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at 
org.codehaus.groovy.tools.GroovyStarter.rootLoader(GroovyStarter.java:111)
        at org.codehaus.groovy.tools.GroovyStarter.main(GroovyStarter.java:129)

    1 error

    74 ocs /tmp> 
    ===