android - Gradle build hanging when jackOptions is enabled for Java 1.8 -

i want use lambdas in project decided switch java 1.8. android studio (2.1.3) forced me enable jackoptions. did install java 1.8 on mac , when run javac -version in terminal javac 1.8.0_101 , jdk in android studio points right one.

when try build project, gradle gets stuck on: :app:compiledebugjavawithjack

i did following , nothing worked:

• gradlew clean
• git clean -fdx , reimport project
• gradlew --stacktrace assemble

if revert java 1.7 lose lambdas feature project builds properly.

any ideas problem?

update

ok after waiting more 5 minutes gradle did spit following error:

error: dex writing phase: classes.dex has many ids. try using multi-dex  com.android.jack.api.v01.compilationexception: dex writing phase: classes.dex has many ids. try using multi-dex         @ com.android.jack.api.v01.impl.api01configimpl$api01compilationtaskimpl.run(api01configimpl.java:113)         @ com.android.builder.core.androidbuilder.convertbytecodeusingjackapis(androidbuilder.java:1852)         @ com.android.builder.core.androidbuilder.convertbytecodeusingjack(androidbuilder.java:1679)         @ com.android.build.gradle.internal.transforms.jacktransform.runjack(jacktransform.java:221)         @ com.android.build.gradle.internal.transforms.jacktransform.transform(jacktransform.java:195)         @ com.android.build.gradle.internal.pipeline.transformtask$2.call(transformtask.java:178)         @ com.android.build.gradle.internal.pipeline.transformtask$2.call(transformtask.java:174)         @ com.android.builder.profile.threadrecorder.record(threadrecorder.java:156)         @ com.android.build.gradle.internal.pipeline.transformtask.transform(transformtask.java:173)         @ sun.reflect.generatedmethodaccessor412.invoke(unknown source)         @ sun.reflect.delegatingmethodaccessorimpl.invoke(delegatingmethodaccessorimpl.java:43)         @ java.lang.reflect.method.invoke(method.java:498)         @ org.gradle.internal.reflect.javamethod.invoke(javamethod.java:75)         @ org.gradle.api.internal.project.taskfactory.annotationprocessingtaskfactory$incrementaltaskaction.doexecute(annotationprocessingtaskfactory.java:245)         @ org.gradle.api.internal.project.taskfactory.annotationprocessingtaskfactory$standardtaskaction.execute(annotationprocessingtaskfactory.java:221)         @ org.gradle.api.internal.project.taskfactory.annotationprocessingtaskfactory$incrementaltaskaction.execute(annotationprocessingtaskfactory.java:232)         @ org.gradle.api.internal.project.taskfactory.annotationprocessingtaskfactory$standardtaskaction.execute(annotationprocessingtaskfactory.java:210)         @ org.gradle.api.internal.tasks.execution.executeactionstaskexecuter.executeaction(executeactionstaskexecuter.java:80)         @ org.gradle.api.internal.tasks.execution.executeactionstaskexecuter.executeactions(executeactionstaskexecuter.java:61)         @ org.gradle.api.internal.tasks.execution.executeactionstaskexecuter.execute(executeactionstaskexecuter.java:46)         @ org.gradle.api.internal.tasks.execution.postexecutionanalysistaskexecuter.execute(postexecutionanalysistaskexecuter.java:35)         @ org.gradle.api.internal.tasks.execution.skipuptodatetaskexecuter.execute(skipuptodatetaskexecuter.java:66)         @ org.gradle.api.internal.tasks.execution.validatingtaskexecuter.execute(validatingtaskexecuter.java:58)         @ org.gradle.api.internal.tasks.execution.skipemptysourcefilestaskexecuter.execute(skipemptysourcefilestaskexecuter.java:52)         @ org.gradle.api.internal.tasks.execution.skiptaskwithnoactionsexecuter.execute(skiptaskwithnoactionsexecuter.java:52)         @ org.gradle.api.internal.tasks.execution.skiponlyiftaskexecuter.execute(skiponlyiftaskexecuter.java:53)         @ org.gradle.api.internal.tasks.execution.executeatmostoncetaskexecuter.execute(executeatmostoncetaskexecuter.java:43)         @ org.gradle.execution.taskgraph.defaulttaskgraphexecuter$eventfiringtaskworker.execute(defaulttaskgraphexecuter.java:203)         @ org.gradle.execution.taskgraph.defaulttaskgraphexecuter$eventfiringtaskworker.execute(defaulttaskgraphexecuter.java:185)         @ org.gradle.execution.taskgraph.abstracttaskplanexecutor$taskexecutorworker.processtask(abstracttaskplanexecutor.java:66)         @ org.gradle.execution.taskgraph.abstracttaskplanexecutor$taskexecutorworker.run(abstracttaskplanexecutor.java:50)         @ org.gradle.internal.concurrent.executorpolicy$catchandrecordfailures.onexecute(executorpolicy.java:54)         @ org.gradle.internal.concurrent.stoppableexecutorimpl$1.run(stoppableexecutorimpl.java:40)         @ java.util.concurrent.threadpoolexecutor.runworker(threadpoolexecutor.java:1142)         @ java.util.concurrent.threadpoolexecutor$worker.run(threadpoolexecutor.java:617)         @ java.lang.thread.run(thread.java:745) caused by: com.android.jack.jackabortexception: dex writing phase: classes.dex has many ids. try using multi-dex         @ com.android.jack.backend.dex.dexfilewriter.run(dexfilewriter.java:90)         @ com.android.jack.backend.dex.dexfilewriter.run(dexfilewriter.java:41)         @ com.android.sched.scheduler.scheduleinstance.runwithlog(scheduleinstance.java:203)         @ com.android.sched.scheduler.multiworkersscheduleinstance$sequentialtask.process(multiworkersscheduleinstance.java:466)         @ com.android.sched.scheduler.multiworkersscheduleinstance$worker.run(multiworkersscheduleinstance.java:163) caused by: com.android.jack.backend.dex.dexwritingexception: dex writing phase: classes.dex has many ids. try using multi-dex         @ com.android.jack.backend.dex.singledexwritingtool.write(singledexwritingtool.java:59)         @ com.android.jack.backend.dex.dexfilewriter.run(dexfilewriter.java:87)         ... 4 more caused by: com.android.jack.backend.dex.singledexoverflowexception: classes.dex has many ids. try using multi-dex         ... 6 more caused by: com.android.jack.tools.merger.methodidoverflowexception: method id overflow when trying merge dex files         @ com.android.jack.tools.merger.constantmanager.adddexfile(constantmanager.java:177)         @ com.android.jack.tools.merger.jackmerger.adddexfile(jackmerger.java:69)         @ com.android.jack.backend.dex.dexwritingtool.mergedex(dexwritingtool.java:149)         @ com.android.jack.backend.dex.singledexwritingtool.write(singledexwritingtool.java:57)         ... 5 more :app:transformjackwithjackfortabletsdebug failed  failure: build failed exception.  * went wrong: execution failed task ':app:transformjackwithjackfortabletsdebug'. > com.android.build.api.transform.transformexception: com.android.jack.api.v01.compilationexception: dex writing phase: classes.dex has many ids. try using multi-dex 

so did turn on multidex , got stuck on building 96% > :app:transformjackwithjackfortabletsdebug

i solved add line app/build.gradle multidexenabled = true below

android{ ...     compilesdkversion rootproject.compileversion     buildtoolsversion rootproject.buildtoolsversion     defaultconfig {        multidexenabled true     }  ... } 

and in project build.gradle

buildscript {     repositories {         jcenter()     }     dependencies {         classpath 'com.android.tools.build:gradle:2.2.2'             } }  allprojects {     repositories {         jcenter()      }  }  ext {     buildtoolsversion = "24.0.3"     supportlibversion = "24.2.1" }