Is it trying to process the class files generated by java? I thought Android 
compiled Java source.  If it is looking at class files then it needs to ignore 
everything under META-INF

Sent from my iPad

> On Jul 8, 2017, at 5:58 PM, Gary Gregory <garydgreg...@gmail.com> wrote:
> 
> We are worst off with our 2.9-SNAPSHOT, I can't even build an app using
> only log4j-api:
> 
> AGPBI: {"kind":"error","text":"Error converting bytecode to dex:\nCause:
> Dex cannot parse version 53 byte code.\nThis is caused by library
> dependencies that have been compiled using Java 8 or above.\nIf you are
> using the \u0027java\u0027 gradle plugin in a library submodule add
> \ntargetCompatibility \u003d \u00271.7\u0027\nsourceCompatibility \u003d
> \u00271.7\u0027\nto that submodule\u0027s build.gradle
> file.","sources":[{}],"original":"UNEXPECTED TOP-LEVEL
> EXCEPTION:\njava.lang.RuntimeException: Exception parsing classes\n\tat
> com.android.dx.command.dexer.Main.processClass(Main.java:781)\n\tat
> com.android.dx.command.dexer.Main.processFileBytes(Main.java:747)\n\tat
> com.android.dx.command.dexer.Main.access$1200(Main.java:88)\n\tat
> com.android.dx.command.dexer.Main$FileBytesConsumer.processFileBytes(Main.java:1689)\n\tat
> com.android.dx.cf.direct.ClassPathOpener.processArchive(ClassPathOpener.java:284)\n\tat
> com.android.dx.cf.direct.ClassPathOpener.processOne(ClassPathOpener.java:166)\n\tat
> com.android.dx.cf.direct.ClassPathOpener.process(ClassPathOpener.java:144)\n\tat
> com.android.dx.command.dexer.Main.processOne(Main.java:695)\n\tat
> com.android.dx.command.dexer.Main.processAllFiles(Main.java:592)\n\tat
> com.android.dx.command.dexer.Main.runMultiDex(Main.java:376)\n\tat
> com.android.dx.command.dexer.Main.run(Main.java:290)\n\tat
> com.android.builder.internal.compiler.DexWrapper.run(DexWrapper.java:54)\n\tat
> com.android.builder.core.DexByteCodeConverter.lambda$dexInProcess$0(DexByteCodeConverter.java:174)\n\tat
> java.util.concurrent.FutureTask.run(FutureTask.java:266)\n\tat
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)\n\tat
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)\n\tat
> java.lang.Thread.run(Thread.java:745)\nCaused by:
> com.android.dx.cf.iface.ParseException: bad class file magic (cafebabe) or
> version (0035.0000)\n\tat
> com.android.dx.cf.direct.DirectClassFile.parse0(DirectClassFile.java:476)\n\tat
> com.android.dx.cf.direct.DirectClassFile.parse(DirectClassFile.java:406)\n\tat
> com.android.dx.cf.direct.DirectClassFile.parseToInterfacesIfNecessary(DirectClassFile.java:388)\n\tat
> com.android.dx.cf.direct.DirectClassFile.getMagic(DirectClassFile.java:251)\n\tat
> com.android.dx.command.dexer.Main.parseClass(Main.java:793)\n\tat
> com.android.dx.command.dexer.Main.access$1600(Main.java:88)\n\tat
> com.android.dx.command.dexer.Main$ClassParserTask.call(Main.java:1728)\n\tat
> com.android.dx.command.dexer.Main.processClass(Main.java:779)\n\t... 16
> more\n","tool":"Dex"}
> AGPBI: {"kind":"error","text":"1 error; aborting","sources":[{}]}
> 
> Can we split off this Java 9 stuff in a separate module?
> 
> Gary
> 
>> On Sat, Jul 8, 2017 at 4:01 PM, Matt Sicker <boa...@gmail.com> wrote:
>> 
>> If you've got some instructions on how to even get an Android project up
>> and running, getting some test code to play with would certainly help. Long
>> ago when I tried debugging some Android issues with Log4j, I couldn't even
>> get that far. :/
>> 
>>> On 8 July 2017 at 17:31, Gary Gregory <garydgreg...@gmail.com> wrote:
>>> 
>>> A quick follow up to note that with 2.8.2, using log4j-api does not cause
>>> problems but then adding log4j-core causes the app to fail to start. So I
>>> definitively see an Android epic for 2.10. Maybe this is when we want to
>>> split up log4j-core.
>>> 
>>> Gary
>>> 
>>> On Sat, Jul 8, 2017 at 3:20 PM, Gary Gregory <garydgreg...@gmail.com>
>>> wrote:
>>> 
>>>> So here I am with my family our of town on a weekend, and I thought I'd
>>>> give Log4j on Android a try.
>>>> 
>>>> The first thing I run into is:
>>>> 
>>>> FAILURE: Build failed with an exception.
>>>> 
>>>> * What went wrong:
>>>> Execution failed for task ':Application:transformResourcesWithMergeJav
>>>> aResForDebug'.
>>>>> com.android.build.api.transform.TransformException:
>>>> com.android.builder.packaging.DuplicateFileException: Duplicate files
>>>> copied in APK META-INF/LICENSE
>>>> File1: C:\Users\ggregory\.gradle\caches\modules-2\files-2.1\
>>>> org.apache.logging.log4j\log4j-core\2.8.2\
>> 979fc0cf8460302e4ffbfe38c1b66a
>>>> 99450b0bb7\log4j-core-2.8.2.jar
>>>> File2: C:\Users\ggregory\.gradle\caches\modules-2\files-2.1\
>>>> org.apache.logging.log4j\log4j-api\2.8.2\
>> e590eeb783348ce8ddef205b82127f
>>>> 9084d82bf3\log4j-api-2.8.2.jar
>>>> 
>>>> 
>>>> * Try:
>>>> Run with --stacktrace option to get the stack trace. Run with --info or
>>>> --debug option to get more log output.
>>>> 
>>>> BUILD FAILED
>>>> 
>>>> Total time: 1.995 secs
>>>> 
>>>> which is solved by:
>>>> 
>>>> https://stackoverflow.com/questions/37586800/android-
>>>> gradle-duplicate-files-copied-in-apk-meta-inf-license-txt
>>>> 
>>>> Which means I have to add this to my build:
>>>> 
>>>> packagingOptions {
>>>>    exclude 'META-INF/DEPENDENCIES'
>>>>    exclude 'META-INF/LICENSE'
>>>> }
>>>> 
>>>> I wonder if we should generate these files pretending we are in an uber
>>> jar, either:
>>>> 
>>>> - with the project name in the name like META-INF/log4j2.LICENSE
>>>> 
>>>> - with maven AID in the name like META-INF/log4j-api.LICENSE
>>>> 
>>>> - with maven coords in the name like META-INF/org.apache.logging.
>>> log4j-log4j-api.LICENSE
>>>> 
>>>> As an aside files like LICENSE and NOTICE do not have .txt extensions
>>> which is lame IMO.
>>>> 
>>>> Ignore and do nothing? Thoughts?
>>>> 
>>>> Gary
>>>> 
>>>> 
>>> 
>> 
>> 
>> 
>> --
>> Matt Sicker <boa...@gmail.com>
>> 


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