Out of memory error: Java heap memory on Android Studio

java android android-studio

How do I fix java.lang.OutOfMemoryError: Java heap space when compiling my Android project?

I get this after I upgraded to version 1 of Android Studio. But, I don't think this is the problem. Most likely when I start upgrading my app to SDK 21 (before this was SDK 20). But I wasn't so sure either.

I've googled around for some fix, but couldn't find one that works. Most of the fix are for Eclipse IDE.

This is the full logcat error that I get when compiling:

warning: Ignoring InnerClasses attribute for an anonymous inner class
(net.lingala.zip4j.unzip.Unzip$1) that doesn't come with an
associated EnclosingMethod attribute. This class was probably produced by a
compiler that did not target the modern .class file format. The recommended
solution is to recompile the class from source, using an up-to-date compiler
and without specifying any "-target" type options. The consequence of ignoring
this warning is that reflective operations on this class will incorrectly
indicate that it is *not* an inner class.
warning: Ignoring InnerClasses attribute for an anonymous inner class
(net.lingala.zip4j.unzip.Unzip$2) that doesn't come with an
associated EnclosingMethod attribute. This class was probably produced by a
compiler that did not target the modern .class file format. The recommended
solution is to recompile the class from source, using an up-to-date compiler
and without specifying any "-target" type options. The consequence of ignoring
this warning is that reflective operations on this class will incorrectly
indicate that it is *not* an inner class.
warning: Ignoring InnerClasses attribute for an anonymous inner class
(net.lingala.zip4j.util.ArchiveMaintainer$1) that doesn't come with an
associated EnclosingMethod attribute. This class was probably produced by a
compiler that did not target the modern .class file format. The recommended
solution is to recompile the class from source, using an up-to-date compiler
and without specifying any "-target" type options. The consequence of ignoring
this warning is that reflective operations on this class will incorrectly
indicate that it is *not* an inner class.
warning: Ignoring InnerClasses attribute for an anonymous inner class
(net.lingala.zip4j.util.ArchiveMaintainer$2) that doesn't come with an
associated EnclosingMethod attribute. This class was probably produced by a
compiler that did not target the modern .class file format. The recommended
solution is to recompile the class from source, using an up-to-date compiler
and without specifying any "-target" type options. The consequence of ignoring
this warning is that reflective operations on this class will incorrectly
indicate that it is *not* an inner class.
warning: Ignoring InnerClasses attribute for an anonymous inner class
(net.lingala.zip4j.zip.ZipEngine$1) that doesn't come with an
associated EnclosingMethod attribute. This class was probably produced by a
compiler that did not target the modern .class file format. The recommended
solution is to recompile the class from source, using an up-to-date compiler
and without specifying any "-target" type options. The consequence of ignoring
this warning is that reflective operations on this class will incorrectly
indicate that it is *not* an inner class.

UNEXPECTED TOP-LEVEL ERROR:
java.lang.OutOfMemoryError: Java heap space
    at com.android.dx.rop.code.RegisterSpec$ForComparison.toRegisterSpec(RegisterSpec.java:642)
    at com.android.dx.rop.code.RegisterSpec.intern(RegisterSpec.java:73)
    at com.android.dx.rop.code.RegisterSpec.make(RegisterSpec.java:90)
    at com.android.dx.cf.code.RopperMachine.run(RopperMachine.java:323)
    at com.android.dx.cf.code.Simulator$SimVisitor.visitLocal(Simulator.java:612)
    at com.android.dx.cf.code.BytecodeArray.parseInstruction(BytecodeArray.java:412)
    at com.android.dx.cf.code.Simulator.simulate(Simulator.java:94)
    at com.android.dx.cf.code.Ropper.processBlock(Ropper.java:787)
    at com.android.dx.cf.code.Ropper.doit(Ropper.java:742)
    at com.android.dx.cf.code.Ropper.convert(Ropper.java:349)
    at com.android.dx.dex.cf.CfTranslator.processMethods(CfTranslator.java:280)
    at com.android.dx.dex.cf.CfTranslator.translate0(CfTranslator.java:137)
    at com.android.dx.dex.cf.CfTranslator.translate(CfTranslator.java:93)
    at com.android.dx.command.dexer.Main.processClass(Main.java:729)
    at com.android.dx.command.dexer.Main.processFileBytes(Main.java:673)
    at com.android.dx.command.dexer.Main.access$300(Main.java:82)
    at com.android.dx.command.dexer.Main$1.processFileBytes(Main.java:602)
    at com.android.dx.cf.direct.ClassPathOpener.processArchive(ClassPathOpener.java:284)
    at com.android.dx.cf.direct.ClassPathOpener.processOne(ClassPathOpener.java:166)
    at com.android.dx.cf.direct.ClassPathOpener.process(ClassPathOpener.java:144)
    at com.android.dx.command.dexer.Main.processOne(Main.java:632)
    at com.android.dx.command.dexer.Main.processAllFiles(Main.java:505)
    at com.android.dx.command.dexer.Main.runMultiDex(Main.java:332)
    at com.android.dx.command.dexer.Main.run(Main.java:243)
    at com.android.dx.command.dexer.Main.main(Main.java:214)
    at com.android.dx.command.Main.main(Main.java:106)

 FAILED

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':app:dexDebug'.
> com.android.ide.common.internal.LoggedErrorException: Failed to run command:
    C:\Users\piracyde25\android-sdks\build-tools\21.1.1\dx.bat --dex --no-optimize --multi-dex --main-dex-list C:\Users\piracyde25\workspace\Baucar\app\build\intermediates\multi-dex\debug\maindexlist.txt --output C:\Users\piracyde25\workspace\Baucar\app\build\intermediates\dex\debug --input-list=C:\Users\piracyde25\workspace\Baucar\app\build\intermediates\tmp\dex\debug\inputList.txt
Error Code:
    3
Output:
    warning: Ignoring InnerClasses attribute for an anonymous inner class
    (net.lingala.zip4j.unzip.Unzip$1) that doesn't come with an
    associated EnclosingMethod attribute. This class was probably produced by a
    compiler that did not target the modern .class file format. The recommended
    solution is to recompile the class from source, using an up-to-date compiler
    and without specifying any "-target" type options. The consequence of ignoring
    this warning is that reflective operations on this class will incorrectly
    indicate that it is *not* an inner class.
    warning: Ignoring InnerClasses attribute for an anonymous inner class
    (net.lingala.zip4j.unzip.Unzip$2) that doesn't come with an
    associated EnclosingMethod attribute. This class was probably produced by a
    compiler that did not target the modern .class file format. The recommended
    solution is to recompile the class from source, using an up-to-date compiler
    and without specifying any "-target" type options. The consequence of ignoring
    this warning is that reflective operations on this class will incorrectly
    indicate that it is *not* an inner class.
    warning: Ignoring InnerClasses attribute for an anonymous inner class
    (net.lingala.zip4j.util.ArchiveMaintainer$1) that doesn't come with an
    associated EnclosingMethod attribute. This class was probably produced by a
    compiler that did not target the modern .class file format. The recommended
    solution is to recompile the class from source, using an up-to-date compiler
    and without specifying any "-target" type options. The consequence of ignoring
    this warning is that reflective operations on this class will incorrectly
    indicate that it is *not* an inner class.
    warning: Ignoring InnerClasses attribute for an anonymous inner class
    (net.lingala.zip4j.util.ArchiveMaintainer$2) that doesn't come with an
    associated EnclosingMethod attribute. This class was probably produced by a
    compiler that did not target the modern .class file format. The recommended
    solution is to recompile the class from source, using an up-to-date compiler
    and without specifying any "-target" type options. The consequence of ignoring
    this warning is that reflective operations on this class will incorrectly
    indicate that it is *not* an inner class.
    warning: Ignoring InnerClasses attribute for an anonymous inner class
    (net.lingala.zip4j.zip.ZipEngine$1) that doesn't come with an
    associated EnclosingMethod attribute. This class was probably produced by a
    compiler that did not target the modern .class file format. The recommended
    solution is to recompile the class from source, using an up-to-date compiler
    and without specifying any "-target" type options. The consequence of ignoring
    this warning is that reflective operations on this class will incorrectly
    indicate that it is *not* an inner class.

    UNEXPECTED TOP-LEVEL ERROR:
    java.lang.OutOfMemoryError: Java heap space
        at com.android.dx.rop.code.RegisterSpec$ForComparison.toRegisterSpec(RegisterSpec.java:642)
        at com.android.dx.rop.code.RegisterSpec.intern(RegisterSpec.java:73)
        at com.android.dx.rop.code.RegisterSpec.make(RegisterSpec.java:90)
        at com.android.dx.cf.code.RopperMachine.run(RopperMachine.java:323)
        at com.android.dx.cf.code.Simulator$SimVisitor.visitLocal(Simulator.java:612)
        at com.android.dx.cf.code.BytecodeArray.parseInstruction(BytecodeArray.java:412)
        at com.android.dx.cf.code.Simulator.simulate(Simulator.java:94)
        at com.android.dx.cf.code.Ropper.processBlock(Ropper.java:787)
        at com.android.dx.cf.code.Ropper.doit(Ropper.java:742)
        at com.android.dx.cf.code.Ropper.convert(Ropper.java:349)
        at com.android.dx.dex.cf.CfTranslator.processMethods(CfTranslator.java:280)
        at com.android.dx.dex.cf.CfTranslator.translate0(CfTranslator.java:137)
        at com.android.dx.dex.cf.CfTranslator.translate(CfTranslator.java:93)
        at com.android.dx.command.dexer.Main.processClass(Main.java:729)
        at com.android.dx.command.dexer.Main.processFileBytes(Main.java:673)
        at com.android.dx.command.dexer.Main.access$300(Main.java:82)
        at com.android.dx.command.dexer.Main$1.processFileBytes(Main.java:602)
        at com.android.dx.cf.direct.ClassPathOpener.processArchive(ClassPathOpener.java:284)
        at com.android.dx.cf.direct.ClassPathOpener.processOne(ClassPathOpener.java:166)
        at com.android.dx.cf.direct.ClassPathOpener.process(ClassPathOpener.java:144)
        at com.android.dx.command.dexer.Main.processOne(Main.java:632)
        at com.android.dx.command.dexer.Main.processAllFiles(Main.java:505)
        at com.android.dx.command.dexer.Main.runMultiDex(Main.java:332)
        at com.android.dx.command.dexer.Main.run(Main.java:243)
        at com.android.dx.command.dexer.Main.main(Main.java:214)
        at com.android.dx.command.Main.main(Main.java:106)

Is it because of one jar library I used (zip4j)? I did try to remove it, but the OOM error still occurs. Any idea how to fix this?

Edit:

I've also edited gradlew file to increase the -Xmx size.

GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\" \"-Xmx2048M \"-XX:MaxPermSize=512M\" \"-XX:ReservedCodeCacheSize=512M\""

Nothing changes.

Edit 2:

Also did this fix but couldn't help it too:

Try the following:

Ctrl + Alt + S -> Compiler -> Gradle

InVM Options field write:

-Xmx2048m -XX:MaxPermSize=512m


I had a similar issue on Android Studio 2.3.3. APK packaging would fail saying Java heap space when building from Android Studio and trying to process a 300MB .so library. In my case two things were needed to fix it. Your build.gradle should contain something like that: 

android {
    dexOptions {
        javaMaxHeapSize "4G"
    }
}

At the root of your project you need to have a file named gradle.properties containing the following:

# That's needed for java to be able the create the APK with our 300MB native  library
# Basically we grant java a 4GB heap.
org.gradle.jvmargs=-Xmx4608m

This is old, but just add this to the build file

dexOptions {
    javaMaxHeapSize "2g"
}

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