While run through ant build.xml - AndroidDriver is giving java.lang.ClassNotFoundException: com.google.common.base.Function

AndroidDriver is giving java.lang.ClassNotFoundException: com.google.common.base.Function

I am using

java-client-5.0.0-BETA9.jar
selenium-server-standalone-3.4.0.jar

along with

commons-io-2.4.jar
hamcrest-core-1.3.jar
junit-4.12.jar

my build.xml is below

    <?xml version="1.0" encoding="UTF-8"?>
<project name="MyProject" default="reporting" basedir=".">
	<description>
	android-Automation build file
	</description>
	<!-- set global properties for this build -->
	
	<property name="src" location="src" />
	<property name="build" location="build" />
	<property name="reports.tests" location="reports" />
	<property name="logs.tests" location="logs" />
	<property name="screenshots.tests" location="screenshots" />


	<!-- Creating the master classpath for external libs -->
	<path id="master-classpath">
		<fileset dir="${basedir}/libs">  //All the mentioned jars are kept in this folder
			<include name="*.jar" />			
		</fileset>
	</path>


	<target name="clean" description="clean up">
		<!-- Delete the ${build} and ${dist} directory trees -->
		<delete dir="${build}" />
		<delete dir="${reports.tests}" />
		<delete dir="${logs.tests}" />
		<delete dir="${screenshots.tests}" />
	
	</target>

	<target name="init" depends="clean">
		<!-- Create the time stamp -->
		<tstamp />
		<!-- Create the build directory structure used by compile -->
		<mkdir dir="${build}" />
		<mkdir dir="${reports.tests}" />
		<mkdir dir="${logs.tests}" />
		<mkdir dir="${screenshots.tests}" />

	</target>

	<target name="compile" depends="init" description="compile the source">
		<!-- Compile the java code from ${src} into ${build} -->
		<javac srcdir="${src}" destdir="${build}">
			<classpath refid="master-classpath">
			</classpath>
		</javac>
	</target>


	<target name="javatests1" depends="compile" >
		<echo> test begins </echo>
		<junit haltonfailure="false" showoutput="true" printsummary="withOutAndErr" failureproperty="test.failed" >
			<classpath refid="master-classpath" />
			<classpath location="${build}" />
			<formatter type="xml" />
			<test name="com.sample.code.android.testcases.Suite001_ExtensionTC" todir="${reports.tests}" errorproperty="abc"/>

			<!--  <batchtest fork="yes" todir="${reports.tests}">
				<fileset dir="${src}">
					<include name="**/*AllTests*.java" />
				</fileset>
			</batchtest> -->
		</junit>
		<echo> end</echo>
	</target>


	<target name="reporting" depends="javatests1">

		<junitreport todir="./reports">
			<fileset dir="./reports">
				<include name="TEST-*.xml"/>
			</fileset>
			<report format="frames" todir="./reports/htmls"/>
		</junitreport>
	</target>
</java>
    </target>
</project>

It is interesting that the same build.xml file when run for IOSDriver with same jars run perfectly fine .

Okay , I found the issue is with ant 1.9.4 version , just now I have updated to 1.10 and it all solved .