I use Linux and Apache Ant without problems.
  Linux  2.6.23.9-mactel x86_64
  java version "1.6.0_03" 64bit

  GWT SDK 2.0.3
  GAE SDK 1.3.1 or 1.3.2

See http://code.google.com/webtoolkit/doc/latest/tutorial/appengine.html
Here is the interesting part of my build.xml:

  <property name="gae.home" location="/usr/local/google/appengine-java-
sdk-1.3.2"/>
  <property name="gwt.home" location="/usr/local/google/gwt-2.0.3"/>

  <property name="gwt-dev.jar" location="${gwt.home}/gwt-dev.jar"/>
  <property name="gwt-user.jar" location="${gwt.home}/gwt-user.jar"/>
  <property name="gwt-servlet.jar" location="${gwt.home}/gwt-
servlet.jar"/>

  <fileset id="gae-tools.fs" dir="${gae.home}/lib">
    <include name="*.jar"/>
  </fileset>

  <fileset id="gae-api.fs" dir="${gae.home}/lib/user">
    <include name="*.jar"/>
  </fileset>

  <path id="gae-tools.path">
    <fileset refid="gae-tools.fs"/>
    <fileset refid="gae-api.fs"/>
  </path>

  <path id="compile.path">
    <fileset refid="gae-api.fs"/>
    <pathelement location="${gwt-user.jar}"/>
    <pathelement location="${gwt-servlet.jar}"/>
  </path>

  <target name="devgwt" depends="compile, gwt-prepare"> <!-- gwt-
prepare copies files to build.dir/gwt-modules and build.src.dir -->
    <java failonerror="true" fork="true"
classname="com.google.gwt.dev.DevMode">
      <classpath>
        <path refid="compile.path"/>
        <pathelement location="${gwt-dev.jar}"/>
        <path refid="gae-tools.path"/>
        <fileset dir="${gae.home}">
          <include name="lib/agent/appengine-agent.jar"/>
        </fileset>
        <pathelement location="${build.dir}/gwt-modules"/> <!-- the
GWT modules *.gwt.xml -->
        <pathelement location="${build.src.dir}"/> <!-- the Java
sources to be transaleted to JavaScript-->
      </classpath>
      <jvmarg value="-Xmx256M"/>
      <arg value="-startupUrl"/>
      <arg value="my-test.jsp"/>
      <!-- Additional arguments like -style PRETTY or -logLevel DEBUG
-->
      <arg value="-server"/>
      <arg
value="com.google.appengine.tools.development.gwt.AppEngineLauncher"/>
      <arg value="-war"/>
      <arg value="${build.war.dir}"/> <!-- the directory containing
the unwared GAE web app -->
      <arg value="com.foo.gwt.mygwtmodule"/> <!-- the GWT module to be
tested -->
    </java>
  </target>


On Mar 26, 7:40 am, xVir <[email protected]> wrote:
> I too have this problem. Anyone knows how it can be solved?
>
> On 27 янв, 00:07, Greg Donald <[email protected]> wrote:
>
> > On Mon, Jan 25, 2010 at 12:04 PM, Greg Donald <[email protected]> wrote:
> > > When I create and attempt to run a new Google App Engine project
> > > (Java) I get this error:
>
> > > GWT Code Server Disconnected
> > > Most likely, you closed GWT development mode. Or you might have lost
> > > network connectivity. To fix this, try restarting GWT Development Mode
> > > and REFRESH this page.
>
> > > In Eclipse I am choosing File -> New -> Web Application Project.  Then
> > > I right-click on the project and run or debug it.  It suggests a URL
> > > for me like:
>
> > >http://localhost:8888/Test_gae.html?gwt.codesvr=127.0.1.1:9997
>
> > > and that's when I get the error message above.
>
> > > Also, the server is dead at this point.  I have to restart it to try 
> > > again.
>
> > > What am I doing wrong?  I'd like to think it's something I did, but I
> > > haven't even written any code yet.
>
> > Anyone?  Does this not work in Eclipse on Linux?
>
> > Thanks.
>
> > --
> > Greg Donald
> > destiney.com | gregdonald.com

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