android studio 打包时出现错误

Information:Gradle tasks [:app:assembleRelease] Error:UNEXPECTED TOP-LEVEL ERROR: Error:java.lang.OutOfMemoryError: GC overhead limit exceeded Error: at java.util.Arrays.copyOfRange(Arrays.java:3664) Error: at java.lang.String.<init>(String.java:207) Error: at com.android.dx.rop.cst.CstString.utf8BytesToString(CstString.java:158) Error: at com.android.dx.rop.cst.CstString.<init>(CstString.java:200) Error: at com.android.dx.cf.cst.ConstantPoolParser.parseUtf8(ConstantPoolParser.java:420) Error: at com.android.dx.cf.cst.ConstantPoolParser.parse0(ConstantPoolParser.java:271) Error: at com.android.dx.cf.cst.ConstantPoolParser.parse0(ConstantPoolParser.java:334) Error: at com.android.dx.cf.cst.ConstantPoolParser.parse0(ConstantPoolParser.java:310) Error: at com.android.dx.cf.cst.ConstantPoolParser.parse(ConstantPoolParser.java:153) Error: at com.android.dx.cf.cst.ConstantPoolParser.parseIfNecessary(ConstantPoolParser.java:127) Error: at com.android.dx.cf.cst.ConstantPoolParser.getPool(ConstantPoolParser.java:118) Error: at com.android.dx.cf.direct.DirectClassFile.parse0(DirectClassFile.java:505) Error: at com.android.dx.cf.direct.DirectClassFile.parse(DirectClassFile.java:420) Error: at com.android.dx.cf.direct.DirectClassFile.parseToInterfacesIfNecessary(DirectClassFile.java:402) Error: at com.android.dx.cf.direct.DirectClassFile.getMagic(DirectClassFile.java:253) Error: at com.android.dx.command.dexer.Main.parseClass(Main.java:774) Error: at com.android.dx.command.dexer.Main.access$1600(Main.java:86) Error: at com.android.dx.command.dexer.Main$ClassParserTask.call(Main.java:1745) Error: at com.android.dx.command.dexer.Main.processClass(Main.java:757) Error: at com.android.dx.command.dexer.Main.processFileBytes(Main.java:725) Error: at com.android.dx.command.dexer.Main.access$1200(Main.java:86) Error: at com.android.dx.command.dexer.Main$FileBytesConsumer.processFileBytes(Main.java:1698) Error: at com.android.dx.cf.direct.ClassPathOpener.processArchive(ClassPathOpener.java:284) Error: at com.android.dx.cf.direct.ClassPathOpener.processOne(ClassPathOpener.java:166) Error: at com.android.dx.cf.direct.ClassPathOpener.process(ClassPathOpener.java:144) Error: at com.android.dx.command.dexer.Main.processOne(Main.java:679) Error: at com.android.dx.command.dexer.Main.processAllFiles(Main.java:571) Error: at com.android.dx.command.dexer.Main.runMultiDex(Main.java:368) Error: at com.android.dx.command.dexer.Main.runDx(Main.java:289) Error: at com.android.dx.command.dexer.Main.main(Main.java:247) Error: at com.android.dx.command.Main.main(Main.java:94) Error:Execution failed for task ':app:transformClassesWithDexForRelease'.

> com.android.build.api.transform.TransformException: 

com.android.ide.common.process.ProcessException:java.util.concurrent.ExecutionException: com.android.ide.common.process.ProcessException: Error while executing java process with main class com.android.dx.command.Main with arguments {--dex --num-threads=4 --multi-dex --main-dex-list E:\xunjian3\WaterGroupMgr\app\build\intermediates\multi-dex\release\maindexlist.txt --output E:\xunjian3\WaterGroupMgr\app\build\intermediates\transforms\dex\release\0 --min-sdk-version 19 E:\xunjian3\WaterGroupMgr\app\build\intermediates\transforms\jarMerging\release\0.jar}

Information:BUILD FAILED in 3m 25s Information:34 errors Information:0 warnings

Information:See complete output in console

加粗的那段，仔细排查就可以找到错误