【问题集】 java.lang.OutOfMemoryError: GC overhead limit exceeded

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UNEXPECTED TOP-LEVEL ERROR:java.lang.OutOfMemoryError: GC overhead limit exceeded    at com.android.dx.dex.code.OutputFinisher.findExpandedOpcodeForInsn(OutputFinisher.java:525)    at com.android.dx.dex.code.OutputFinisher.calculateReservedCount(OutputFinisher.java:466)    at com.android.dx.dex.code.OutputFinisher.reserveRegisters(OutputFinisher.java:402)    at com.android.dx.dex.code.OutputFinisher.finishProcessingAndGetList(OutputFinisher.java:358)    at com.android.dx.dex.code.DalvCode.finishProcessingIfNecessary(DalvCode.java:108)    at com.android.dx.dex.code.DalvCode.getInsns(DalvCode.java:185)    at com.android.dx.dex.file.CodeItem.place0(CodeItem.java:223)    at com.android.dx.dex.file.OffsettedItem.place(OffsettedItem.java:242)    at com.android.dx.dex.file.MixedItemSection.placeItems(MixedItemSection.java:312)    at com.android.dx.dex.file.DexFile.toDex0(DexFile.java:543)    at com.android.dx.dex.file.DexFile.toDex(DexFile.java:216)    at com.android.dx.command.dexer.Main.writeDex(Main.java:574)    at com.android.dx.command.dexer.Main.run(Main.java:218)    at com.android.dx.command.dexer.Main.main(Main.java:174)    at com.android.dx.command.Main.main(Main.java:95)make: *** [out/target/common/obj/JAVA_LIBRARIES/framework_intermediates/noproguard.classes-with-local.dex] error 3

解决方法：

方法一：

用java命令指定java虚拟机堆的大小来把需要编译的东西先编译出来，可能需要几分钟。

  java -Xms3550M -Xmx3550M -jar /home/test/4.0/out/host/linux-x86/framework/dx.jar --dex --output=out/target/common/obj/JAVA_LIBRARIES/framework_intermediates/noproguard.classes-with-local.dex --core-library out/target/common/obj/JAVA_LIBRARIES/framework_intermediates/noproguard.classes.jar

运行完这个后。再重新make就好了，因为这个包已经被make出来了，所以重新make的时候不会再去编译它
这个方法只能是make出错后在执行上述命令，然后在接着执行make命令

方法二：

修改definitions.mk文件此文件位于build/core/目录下

修改变量：transform-classes.jar-to-dex中的-JXms16M -JXmx1024M值

代码中的变量定义:

define transform-classes.jar-to-dex
@echo “target Dex: (PRIVATEMODULE)”@mkdir−p(dir @)(hide) (DX) (if (findstringwindows,(HOST_OS)),,-JXms16M -JXmx1024M) \
–dex –output=@ (if (NOOPTIMIZEDX), –no−optimize) (if (GENERATEDEXDEBUG), –debug–verbose –dump−to=(@:.dex=.lst) \
–dump-width=1000) \
(PRIVATEDXFLAGS) <
endef

将-JXms16M -JXmx1024M 修改成适当的值

我的机器是内存是32G的，我将-JXms16M -JXmx1024M修改为-JXms1024M -JXmx2048M

具体值的大小要根据具体机器的内存而定，内存太少设置的值大一样会出现问题。这里写代码片

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