构建失败java.lang.OutOfMemoryError：Java堆空间

Question

I am facing this issue while building my build.xml.

BUILD FAILED
java.lang.OutOfMemoryError: Java heap space
    at java.util.Arrays.copyOf(Arrays.java:2786)
    at java.io.ByteArrayOutputStream.write(ByteArrayOutputStream.java:94)
    at org.codehaus.cargo.module.DefaultJarArchive.<init>(DefaultJarArchive.
java:75)
    at org.codehaus.cargo.module.DefaultJarArchive.<init>(DefaultJarArchive.
java:56)
    at org.codehaus.cargo.module.webapp.DefaultWarArchive.<init>(DefaultWarA
rchive.java:69)
    at org.apache.cactus.integration.ant.CactifyWarTask.addJarWithClass(Cact
ifyWarTask.java:652)
    at org.apache.cactus.integration.ant.CactifyWarTask.addCactusJars(Cactif
yWarTask.java:627)
    at org.apache.cactus.integration.ant.CactifyWarTask.execute(CactifyWarTa
sk.java:519)
    at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:288)
    at sun.reflect.GeneratedMethodAccessor31.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
sorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.jav
a:106)
    at org.apache.tools.ant.Task.perform(Task.java:348)
    at org.apache.tools.ant.taskdefs.Sequential.execute(Sequential.java:62)
    at net.sf.antcontrib.logic.IfTask.execute(IfTask.java:197)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.
java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
sorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.jav
a:106)
    at org.apache.tools.ant.TaskAdapter.execute(TaskAdapter.java:154)
    at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:288)
    at sun.reflect.GeneratedMethodAccessor31.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
sorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.jav
a:106)
    at org.apache.tools.ant.Task.perform(Task.java:348)
    at org.apache.tools.ant.Target.execute(Target.java:357)
    at org.apache.tools.ant.Target.performTasks(Target.java:385)
    at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1337)
    at org.apache.tools.ant.Project.executeTarget(Project.java:1306)

Answer 1

It sounds like you need to launch your JVM with a larger memory limit. Try something like (if you're using Bourne shell):

export ANT_OPTS=-Xmx1g
ant

or, if you use cmd under Windows:

set ANT_OPTS=-Xmx1g
ant

Above, the 1g means 1 GB. You can tweak that to whatever you like; for example, if you want to use 1.5 GB, you can use -Xmx1536m .

Answer 2

(For < Java 8, permgen doesn't apply to Java 8 and up)

For benefit of those who got a similar trace with the word "PermGen" in the Error message,

java.lang.OutOfMemoryError: PermGen space

Increasing the perm-gean space in ANT_OPTS (preferably, though not necessarily along with the Max heap size) should solve the issue

example

export ANT_OPTS="-Xmx2g -XX:MaxPermSize=512m"

Adjust the numbers as per your your need.

Cheers!

Answer 3

If 'javac' task is used with fork option then , javac will run in his own process and memory should be directly assigned to the javac using 'memoryinitialsize' and 'memorymaximumsize':

javac   srcdir="${src}"
            destdir="${classes}"
            source="1.6"
            debug="true"
            fork="true"
            deprecation="off"
            memoryinitialsize="512m"
            memorymaximumsize="1024m"

Answer 4

You need to set ANT_OPTS to next higher level in dx.bat file.which is located \\build-tools\\versions\\dx.bat. set defaultXmx=-Xmx2048M I set it to 2GB.