Unreachable Browser Exception using Appium - appium

Question

I am automating android app using Appium. I am getting exception while using AndroidDriver().
Below is the code snippet.
public class Test1 {
public static AndroidDriver driver;
public static void main(String[] args) throws Exception {
File appDir= new File(System.getProperty("user.dir")+"/app/");
System.out.println(appDir);
File app=new File(appDir,"android-debug.apk");
DesiredCapabilities cap=new DesiredCapabilities();
cap.setCapability(MobileCapabilityType.APP,app.getAbsolutePath());
cap.setCapability(MobileCapabilityType.PLATFORM,MobilePlatform.ANDROID);
cap.setCapability(MobileCapabilityType.PLATFORM_NAME,"Android");
cap.setCapability(MobileCapabilityType.DEVICE_NAME,"My Phone");
cap.setCapability(MobileCapabilityType.VERSION,"5.0.2");
cap.setCapability(AndroidMobileCapabilityType.APP_PACKAGE,"com.ionicframework.appsix821050" );
cap.setCapability(AndroidMobileCapabilityType.APP_ACTIVITY,"com.ionicframework.appsix821050.MainActivity" );
URL url=new URL("http:127.0.0.1:4723/wd/hub");
try
{
driver = new AndroidDriver(url, cap);
}
catch(Exception e)
{
e.printStackTrace();
}
}
}
Following is the error which is found while running the above code
org.openqa.selenium.remote.UnreachableBrowserException: Could not
start a new session. Possible causes are invalid address of the remote
server or browser start-up failure.
Build info: version: '2.39.0', revision: '14fa800511cc5d66d426e08b0b2ab926c7ed7398', time: '2013-12-16
13:18:38'
System info: host: 'Mindpro1-PC', ip: '192.168.0.103', os.name: 'Windows 7', os.arch: 'amd64', os.version: '6.1', java.version:
'1.8.0_112'
Driver info: driver.version: AndroidDriver
at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:548)
at org.openqa.selenium.remote.RemoteWebDriver.startSession(RemoteWebDriver.java:216)
at org.openqa.selenium.remote.RemoteWebDriver.(RemoteWebDriver.java:111)
at org.openqa.selenium.remote.RemoteWebDriver.(RemoteWebDriver.java:129)
at org.openqa.selenium.android.AndroidDriver.(AndroidDriver.java:89)
at Test1.main(Test1.java:52)
Caused by: org.apache.http.client.ClientProtocolException
at org.apache.http.impl.client.AbstractHttpClient.doExecute(AbstractHttpClient.java:888)
at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:71)
at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:55)
at org.openqa.selenium.remote.HttpCommandExecutor.fallBackExecute(HttpCommandExecutor.java:319)
at org.openqa.selenium.remote.HttpCommandExecutor.execute(HttpCommandExecutor.java:298)
at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:527)
... 5 more
Caused by: org.apache.http.HttpException: Cannot convert host to URI: http://
at org.apache.http.impl.conn.ProxySelectorRoutePlanner.determineProxy(ProxySelectorRoutePlanner.java:185)
at org.apache.http.impl.conn.ProxySelectorRoutePlanner.determineRoute(ProxySelectorRoutePlanner.java:139)
at org.apache.http.impl.client.DefaultRequestDirector.determineRoute(DefaultRequestDirector.java:763)
at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:382)
at org.apache.http.impl.client.AbstractHttpClient.doExecute(AbstractHttpClient.java:884)
... 10 more
Caused by: java.net.URISyntaxException: Expected authority at index 7: http://
at java.net.URI$Parser.fail(Unknown Source)
at java.net.URI$Parser.failExpecting(Unknown Source)
at java.net.URI$Parser.parseHierarchical(Unknown Source)
at java.net.URI$Parser.parse(Unknown Source)
at java.net.URI.(Unknown Source)
at org.apache.http.impl.conn.ProxySelectorRoutePlanner.determineProxy(ProxySelectorRoutePlanner.java:183)
... 14 more`