gwt-compile:
[echo] env.GWT_HOME=C:\data\java\tools\gwt-windows-1.5.3
[java] Exception in thread "main" java.lang.OutOfMemoryError: Java heap space
[java] at java.util.Arrays.copyOf(Arrays.java:2882)
[java] at java.lang.String.
[java] at com.google.gwt.dev.javac.CompiledClass.
....
Possible Issue and Solution
In order to invoke the gwt-compiler via an Ant task successfully, you will probably need to increase the maximum memory as follows:
<target name="gwt-compile" description="...">
<java classname="com.google.gwt.dev.GWTCompiler" fork="true” maxmemory="256m" failonerror="true">
<arg line="-out ${build}/www" />
<arg value="${gwt.module}" />
<classpath refid="gwt.classpath" />
</java>
</target>
Posts
7 comments:
Does it really say out of memory, cause I've been using GWT and never encountered such error, yeah, never built using ant. Which builder does GWT uses then??
This only happens once you automate your build process using Ant and don't have the "maxmemory" setting defined.
How are you compiling your project? If you used ProjectCreator, you will notice that the generated *compile.cmd script has "@java -Xmx256M" so you wouldn't get the memory error.
I'm using eclipse plugin that google provided, so don't know which compiler it does use internally. I've not seen much website using GWT (other than Google), I'd love to see your app.
I did a very primitive site RedditWorks.com using GWT, just for a testing purpose hardly a day work, GWT is perfect for fast and professional looks. Are you using ProjectCreator?
I'm using Elipse to develop, but prefer to run the hosted mode using the scripts I generated using ProjectCreator and ApplicationCreator. I like knowing how things are wired together and which java processes GWT is using to do its magic.
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