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Java 9 incompatibility #2149
Java 9 incompatibility #2149
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Due to restructuring in the JDK’s internal-use packages, sun.misc is very different in Java 9, and much of it is not available due to the «Project Jigsaw» modularization of the JRE actually making internal-use packages internal. This affects Lein because, at the bare minimum, sun.misc.Launcher is used even when running the command lein with no args. This class, Launcher , is likely being restructured because a new sun.launcher package is present in the root module, whichexports a small subset of sun.misc and other internal-use packages. This subset notably includes the Unsafe class, but that one may be limited to JRE builds that include the module jdk.unsupported , which is discouraged already and a likely candidate for removal in Java 10.
The information on this is scattered around the OpenJDK site, but this JEP is the most relevant: http://openjdk.java.net/jeps/260 , and this section on modularization should also be useful: http://openjdk.java.net/projects/jigsaw/ . I’m using the 4th preview release of the Zulu OpenJDK 9 builds, available here: http://zulu.org/zulu-9-pre-release-downloads/
The exact stacktrace I get when running lein is:
C:\Program Files\Zulu\compiler>lein Exception in thread "main" java.lang.ExceptionInInitializerError at java.lang.Class.forName0(java.base@9-ea/Native Method) at java.lang.Class.forName(java.base@9-ea/Class.java:378) at clojure.lang.RT.classForName(RT.java:2168) at clojure.lang.RT.classForName(RT.java:2177) at clojure.lang.RT.loadClassForName(RT.java:2196) at clojure.lang.RT.load(RT.java:443) at clojure.lang.RT.load(RT.java:419) at clojure.core$load$fn__5677.invoke(core.clj:5893) at clojure.core$load.invokeStatic(core.clj:5892) at clojure.core$load.doInvoke(core.clj:5876) at clojure.lang.RestFn.invoke(RestFn.java:408) at clojure.core$load_one.invokeStatic(core.clj:5697) at clojure.core$load_one.invoke(core.clj:5692) at clojure.core$load_lib$fn__5626.invoke(core.clj:5737) at clojure.core$load_lib.invokeStatic(core.clj:5736) at clojure.core$load_lib.doInvoke(core.clj:5717) at clojure.lang.RestFn.applyTo(RestFn.java:142) at clojure.core$apply.invokeStatic(core.clj:648) at clojure.core$load_libs.invokeStatic(core.clj:5774) at clojure.core$load_libs.doInvoke(core.clj:5758) at clojure.lang.RestFn.applyTo(RestFn.java:137) at clojure.core$apply.invokeStatic(core.clj:648) at clojure.core$require.invokeStatic(core.clj:5796) at clojure.core$require.doInvoke(core.clj:5796) at clojure.lang.RestFn.invoke(RestFn.java:703) at leiningen.core.project$loading__5569__auto____5958.invoke(project.clj:1) at leiningen.core.project__init.load(Unknown Source) at leiningen.core.project__init.(Unknown Source) at java.lang.Class.forName0(java.base@9-ea/Native Method) at java.lang.Class.forName(java.base@9-ea/Class.java:378) at clojure.lang.RT.classForName(RT.java:2168) at clojure.lang.RT.classForName(RT.java:2177) at clojure.lang.RT.loadClassForName(RT.java:2196) at clojure.lang.RT.load(RT.java:443) at clojure.lang.RT.load(RT.java:419) at clojure.core$load$fn__5677.invoke(core.clj:5893) at clojure.core$load.invokeStatic(core.clj:5892) at clojure.core$load.doInvoke(core.clj:5876) at clojure.lang.RestFn.invoke(RestFn.java:408) at clojure.core$load_one.invokeStatic(core.clj:5697) at clojure.core$load_one.invoke(core.clj:5692) at clojure.core$load_lib$fn__5626.invoke(core.clj:5737) at clojure.core$load_lib.invokeStatic(core.clj:5736) at clojure.core$load_lib.doInvoke(core.clj:5717) at clojure.lang.RestFn.applyTo(RestFn.java:142) at clojure.core$apply.invokeStatic(core.clj:648) at clojure.core$load_libs.invokeStatic(core.clj:5774) at clojure.core$load_libs.doInvoke(core.clj:5758) at clojure.lang.RestFn.applyTo(RestFn.java:137) at clojure.core$apply.invokeStatic(core.clj:648) at clojure.core$require.invokeStatic(core.clj:5796) at clojure.core$require.doInvoke(core.clj:5796) at clojure.lang.RestFn.invoke(RestFn.java:619) at leiningen.core.main$loading__5569__auto____5695.invoke(main.clj:1) at leiningen.core.main__init.load(Unknown Source) at leiningen.core.main__init.(Unknown Source) at java.lang.Class.forName0(java.base@9-ea/Native Method) at java.lang.Class.forName(java.base@9-ea/Class.java:378) at clojure.lang.RT.classForName(RT.java:2168) at clojure.lang.RT.classForName(RT.java:2177) at clojure.lang.RT.loadClassForName(RT.java:2196) at clojure.lang.RT.load(RT.java:443) at clojure.lang.RT.load(RT.java:419) at clojure.core$load$fn__5677.invoke(core.clj:5893) at clojure.core$load.invokeStatic(core.clj:5892) at clojure.core$load.doInvoke(core.clj:5876) at clojure.lang.RestFn.invoke(RestFn.java:408) at clojure.core$load_one.invokeStatic(core.clj:5697) at clojure.core$load_one.invoke(core.clj:5692) at clojure.core$load_lib$fn__5626.invoke(core.clj:5737) at clojure.core$load_lib.invokeStatic(core.clj:5736) at clojure.core$load_lib.doInvoke(core.clj:5717) at clojure.lang.RestFn.applyTo(RestFn.java:142) at clojure.core$apply.invokeStatic(core.clj:648) at clojure.core$load_libs.invokeStatic(core.clj:5774) at clojure.core$load_libs.doInvoke(core.clj:5758) at clojure.lang.RestFn.applyTo(RestFn.java:137) at clojure.core$apply.invokeStatic(core.clj:648) at clojure.core$require.invokeStatic(core.clj:5796) at clojure.main$main_opt.invokeStatic(main.clj:314) at clojure.main$main_opt.invoke(main.clj:310) at clojure.main$main.invokeStatic(main.clj:421) at clojure.main$main.doInvoke(main.clj:384) at clojure.lang.RestFn.invoke(RestFn.java:421) at clojure.lang.Var.invoke(Var.java:383) at clojure.lang.AFn.applyToHelper(AFn.java:156) at clojure.lang.Var.applyTo(Var.java:700) at clojure.main.main(main.java:37) Caused by: java.lang.ClassNotFoundException: sun.misc.Launcher, compiling:(dynapath/defaults.clj:29:3) at clojure.lang.Compiler.analyzeSeq(Compiler.java:6875) at clojure.lang.Compiler.analyze(Compiler.java:6669) at clojure.lang.Compiler.analyze(Compiler.java:6625) at clojure.lang.Compiler$BodyExpr$Parser.parse(Compiler.java:6001) at clojure.lang.Compiler$LetExpr$Parser.parse(Compiler.java:6319) at clojure.lang.Compiler.analyzeSeq(Compiler.java:6868) at clojure.lang.Compiler.analyze(Compiler.java:6669) at clojure.lang.Compiler.analyze(Compiler.java:6625) at clojure.lang.Compiler$BodyExpr$Parser.parse(Compiler.java:6001) at clojure.lang.Compiler$FnMethod.parse(Compiler.java:5380) at clojure.lang.Compiler$FnExpr.parse(Compiler.java:3972) at clojure.lang.Compiler.analyzeSeq(Compiler.java:6866) at clojure.lang.Compiler.analyze(Compiler.java:6669) at clojure.lang.Compiler.eval(Compiler.java:6924) at clojure.lang.Compiler.load(Compiler.java:7379) at clojure.lang.RT.loadResourceScript(RT.java:372) at clojure.lang.RT.loadResourceScript(RT.java:363) at clojure.lang.RT.load(RT.java:453) at clojure.lang.RT.load(RT.java:419) at clojure.core$load$fn__5677.invoke(core.clj:5893) at clojure.core$load.invokeStatic(core.clj:5892) at clojure.core$load.doInvoke(core.clj:5876) at clojure.lang.RestFn.invoke(RestFn.java:408) at clojure.core$load_one.invokeStatic(core.clj:5697) at clojure.core$load_one.invoke(core.clj:5692) at clojure.core$load_lib$fn__5626.invoke(core.clj:5737) at clojure.core$load_lib.invokeStatic(core.clj:5736) at clojure.core$load_lib.doInvoke(core.clj:5717) at clojure.lang.RestFn.applyTo(RestFn.java:142) at clojure.core$apply.invokeStatic(core.clj:648) at clojure.core$load_libs.invokeStatic(core.clj:5774) at clojure.core$load_libs.doInvoke(core.clj:5758) at clojure.lang.RestFn.applyTo(RestFn.java:137) at clojure.core$apply.invokeStatic(core.clj:648) at clojure.core$require.invokeStatic(core.clj:5796) at clojure.core$require.doInvoke(core.clj:5796) at clojure.lang.RestFn.invoke(RestFn.java:421) at dynapath.util$eval254$loading__5569__auto____255.invoke(util.clj:1) at dynapath.util$eval254.invokeStatic(util.clj:1) at dynapath.util$eval254.invoke(util.clj:1) at clojure.lang.Compiler.eval(Compiler.java:6927) at clojure.lang.Compiler.eval(Compiler.java:6916) at clojure.lang.Compiler.load(Compiler.java:7379) at clojure.lang.RT.loadResourceScript(RT.java:372) at clojure.lang.RT.loadResourceScript(RT.java:363) at clojure.lang.RT.load(RT.java:453) at clojure.lang.RT.load(RT.java:419) at clojure.core$load$fn__5677.invoke(core.clj:5893) at clojure.core$load.invokeStatic(core.clj:5892) at clojure.core$load.doInvoke(core.clj:5876) at clojure.lang.RestFn.invoke(RestFn.java:408) at clojure.core$load_one.invokeStatic(core.clj:5697) at clojure.core$load_one.invoke(core.clj:5692) at clojure.core$load_lib$fn__5626.invoke(core.clj:5737) at clojure.core$load_lib.invokeStatic(core.clj:5736) at clojure.core$load_lib.doInvoke(core.clj:5717) at clojure.lang.RestFn.applyTo(RestFn.java:142) at clojure.core$apply.invokeStatic(core.clj:648) at clojure.core$load_libs.invokeStatic(core.clj:5774) at clojure.core$load_libs.doInvoke(core.clj:5758) at clojure.lang.RestFn.applyTo(RestFn.java:137) at clojure.core$apply.invokeStatic(core.clj:648) at clojure.core$require.invokeStatic(core.clj:5796) at clojure.core$require.doInvoke(core.clj:5796) at clojure.lang.RestFn.invoke(RestFn.java:436) at cemerick.pomegranate$loading__5569__auto____12241.invoke(pomegranate.clj:1) at cemerick.pomegranate__init.load(Unknown Source) at cemerick.pomegranate__init.(Unknown Source) . 88 more Caused by: java.lang.ClassNotFoundException: sun.misc.Launcher at java.net.URLClassLoader.findClass(java.base@9-ea/URLClassLoader.java:384) at clojure.lang.DynamicClassLoader.findClass(DynamicClassLoader.java:69) at java.lang.ClassLoader.loadClass(java.base@9-ea/ClassLoader.java:486) at clojure.lang.DynamicClassLoader.loadClass(DynamicClassLoader.java:77) at java.lang.ClassLoader.loadClass(java.base@9-ea/ClassLoader.java:419) at java.lang.Class.forName0(java.base@9-ea/Native Method) at java.lang.Class.forName(java.base@9-ea/Class.java:378) at clojure.lang.RT.classForName(RT.java:2168) at clojure.lang.RT.classForName(RT.java:2177) at clojure.lang.Compiler.maybeResolveIn(Compiler.java:7187) at clojure.core$ns_resolve.invokeStatic(core.clj:4240) at clojure.core$ns_resolve.invokeStatic(core.clj:4229) at clojure.core$resolve.invokeStatic(core.clj:4242) at clojure.core$resolve.invoke(core.clj:4242) at dynapath.defaults$when_resolves.invokeStatic(defaults.clj:9) at dynapath.defaults$when_resolves.doInvoke(defaults.clj:7) at clojure.lang.RestFn.invoke(RestFn.java:467) at clojure.lang.Var.invoke(Var.java:394) at clojure.lang.AFn.applyToHelper(AFn.java:165) at clojure.lang.Var.applyTo(Var.java:700) at clojure.lang.Compiler.macroexpand1(Compiler.java:6776) at clojure.lang.Compiler.analyzeSeq(Compiler.java:6854) . 155 more That’s run with a subset of the modules in the normal JDK, but the error is identical if I run with the non-limited module set of a normal OpenJDK 9 installation.
This isn’t at all urgent, but I hope there’s an easy fix for using sun.* classes that can be applied sometime before Java 9 starts to become more commonly used.
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