I need to do run an existing grails project (which was running on windows) on a Mac system.
Before that, I am trying to setup grails and run a "hello world". I downloaded and installed grails using sdkman. My setup directory is -
/Users/sandeepan.nath/Desktop/setups where I have created grails directory and ran the sdk install grails command which installed grails and created these -
SandeepanNath:grails sandeepan.nath$ ls -lrth
total 80
-rw-r--r-- 1 sandeepan.nath 1974079253 73B Jun 1 13:03 gradle.properties
drwxr-xr-x 3 sandeepan.nath 1974079253 96B Jun 1 13:03 gradle
-rwxr--r-- 1 sandeepan.nath 1974079253 4.9K Jun 1 13:03 gradlew
-rwxr--r-- 1 sandeepan.nath 1974079253 2.3K Jun 1 13:03 gradlew.bat
-rwxr--r-- 1 sandeepan.nath 1974079253 4.6K Jun 1 13:03 grailsw
-rwxr--r-- 1 sandeepan.nath 1974079253 2.3K Jun 1 13:03 grailsw.bat
drwxr-xr-x 5 sandeepan.nath 1974079253 160B Jun 1 13:03 src
-rw-r--r-- 1 sandeepan.nath 1974079253 5.3K Jun 1 13:03 grails-wrapper.jar
drwxr-xr-x 12 sandeepan.nath 1974079253 384B Jun 1 13:03 grails-app
-rw-r--r-- 1 sandeepan.nath 1974079253 2.9K Jun 1 13:03 build.gradle
drwxr-xr-x 2 sandeepan.nath 1974079253 64B Jun 1 13:03 build
I ran grails create-app hello to create a project while inside the grails directory, but it failed -
SandeepanNath:hello sandeepan.nath$ grails create-app hello
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by org.codehaus.groovy.reflection.CachedClass (file:/Users/sandeepan.nath/.sdkman/candidates/grails/3.3.10/lib/org.codehaus.groovy/groovy/jars/groovy-2.4.17.jar) to method java.lang.Object.finalize()
WARNING: Please consider reporting this to the maintainers of org.codehaus.groovy.reflection.CachedClass
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
| Error Error initializing classpath: Could not determine java version from '12.0.1'. (Use --stacktrace to see the full trace)
I went one level up, outside the grails directory, and created project (worked) -
SandeepanNath:setups sandeepan.nath$ grails create-app new_proj
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by org.codehaus.groovy.reflection.CachedClass (file:/Users/sandeepan.nath/.sdkman/candidates/grails/3.3.10/lib/org.codehaus.groovy/groovy/jars/groovy-2.4.17.jar) to method java.lang.Object.finalize()
WARNING: Please consider reporting this to the maintainers of org.codehaus.groovy.reflection.CachedClass
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
| Application created at /Users/sandeepan.nath/Desktop/setups/new_proj
and followed the steps to create a project as in https://docs.grails.org/3.3.10/guide/single.html#creatingAnApplication.
Now, when I am inside new_proj, and try running grails command, I am blocked here -
SandeepanNath:new_proj sandeepan.nath$ grails
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by org.codehaus.groovy.reflection.CachedClass (file:/Users/sandeepan.nath/.sdkman/candidates/grails/3.3.10/lib/org.codehaus.groovy/groovy/jars/groovy-2.4.17.jar) to method java.lang.Object.finalize()
WARNING: Please consider reporting this to the maintainers of org.codehaus.groovy.reflection.CachedClass
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
| Error Error initializing classpath: Could not determine java version from '12.0.1'. (Use --stacktrace to see the full trace)
I have Java home set in the environment PATH variable -
SandeepanNath:~ sandeepan.nath$ echo $PATH
/Users/sandeepan.nath/.sdkman/candidates/grails/current/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/bin:/opt/apache-maven/bin:/usr/libexec/java_home/bin:/opt/apache-maven/bin:/usr/libexec/java_home:/opt/apache-maven/bin
Note - there is no such path as /usr/libexec/java_home/bin
Still, when I try running grails command from within my project, I get this Could not determine java version error -
SandeepanNath:new_proj sandeepan.nath$ grails --stacktrace
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by org.codehaus.groovy.reflection.CachedClass (file:/Users/sandeepan.nath/.sdkman/candidates/grails/3.3.10/lib/org.codehaus.groovy/groovy/jars/groovy-2.4.17.jar) to method java.lang.Object.finalize()
WARNING: Please consider reporting this to the maintainers of org.codehaus.groovy.reflection.CachedClass
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
| Error Error initializing classpath: Could not determine java version from '12.0.1'. (NOTE: Stack trace has been filtered. Use --verbose to see entire trace.)
java.lang.IllegalArgumentException: Could not determine java version from '12.0.1'.
at org.gradle.api.JavaVersion.toVersion(JavaVersion.java:68)
at org.gradle.api.JavaVersion.current(JavaVersion.java:78)
at org.gradle.internal.jvm.UnsupportedJavaRuntimeException.assertUsingVersion(UnsupportedJavaRuntimeException.java:29)
at org.gradle.tooling.internal.consumer.ConnectorServices.checkJavaVersion(ConnectorServices.java:66)
at org.gradle.tooling.internal.consumer.ConnectorServices.close(ConnectorServices.java:53)
at org.gradle.tooling.internal.consumer.DefaultGradleConnector.close(DefaultGradleConnector.java:57)
at org.grails.cli.gradle.cache.CachedGradleOperation.call(CachedGradleOperation.groovy:78)
at org.grails.cli.GrailsCli.populateContextLoader(GrailsCli.groovy:525)
at org.grails.cli.GrailsCli.initializeProfile(GrailsCli.groovy:508)
at org.grails.cli.GrailsCli.initializeApplication(GrailsCli.groovy:306)
at org.grails.cli.GrailsCli.execute(GrailsCli.groovy:269)
at org.grails.cli.GrailsCli.main(GrailsCli.groovy:159)
Install JDK 8 from Oracle, once installed you should be ok. Grails 3 requires 7 or 8.