Build\war\ode builder error

Moiz_OnLine · January 14, 2021, 1:42am

ant run builder error show

Techno_Vedang · January 14, 2021, 4:34am

check java -version and javac -version. maybe you have not edited environmental variable currectly.

bartmathijssen · January 14, 2021, 12:34pm

There are multiple topics in the community of people getting the same error you are getting. For the next time, please search the community before asking. You can find a similar topic to yours here.

ewpatton · January 14, 2021, 1:54pm

Also, it's generally more helpful if you copy and paste the error text rather than just showing a screenshot, since the text can be indexed for search. Unless you've made significant changes to the appengine code, you most likely don't have enough RAM to build App Inventor.

Kumaraswamy · January 14, 2021, 1:56pm

What is the minimum RAM required?

vknow360 · January 14, 2021, 2:08pm

Probably 4gb.
But I am sure @ewpatton Sir meant available/free ram and not total ram.

ewpatton · January 14, 2021, 2:09pm

Some of the Java processes during the build need to be able to allocate up to 2 GB, so realistically you probably want 4 GB of RAM. Sometimes I have seen that there is a special environment variable on Windows that gets picked up by the JVM that sets the max memory to 1 GB, overriding the amount App Inventor requests. Look through your log and see if there are any mentions of JAVA_OPTS. If so, you may need to unset that environment variable before building since it arbitrarily constricts the buildsystem.

You can also request more memory for the Java process by changing this line:

github.com

mit-cml/appinventor-sources/blob/6516283d20d0b1ecc5c4c5719bd3d809877978c9/appinventor/appengine/build.xml#L592


      <pathelement location="${lib.dir}/gwt_dragdrop/gwt-dnd-3.2.3.jar" />
      <pathelement location="${lib.dir}/gwt_incubator/gwt-incubator-20101117-r1766.jar" />
      <pathelement location="${lib.dir}/gwt_query/gwtquery-1.5-beta1.jar" />
      <!-- gwt libs -->
      <pathelement location="${gwt.sdk}/gwt-dev.jar"/>
      <pathelement location="${gwt.sdk}/gwt-user.jar"/>
      <pathelement location="${gwt.sdk}/validation-api-1.0.0.GA.jar" />
      <pathelement location="${gwt.sdk}/validation-api-1.0.0.GA-sources.jar" />
    </classpath>
    <jvmarg value="-Xss2M"/>  <!-- increase if you see a StackOverflowError -->
    <jvmarg value="-Xmx2G"/>
    <jvmarg line="${XstartOnFirstThread}"/>
    <jvmarg value="-Dfile.encoding=UTF-8" />
    <arg line="-war"/>
    <arg value="${build.war.dir}"/>
    <arg line="-logLevel INFO -extra ${build.extra.dir} -style pretty"/>
    <arg value="com.google.appinventor.YaClient"/>
  </java>
</target>


<target name="devmode"

to 3G or 4G, for example, instead of 2G. However, these are the default options we use for building in dev and prod so it should be sufficient for you (unless there are significant changes applied).