Author Topic: Grid2 problem without SeleneseCommandExecutor (Read 1050 times)

h k · « **on:** April 01, 2012, 06:37:25 PM »

I cannot get Grid2 to work following the example in
http://code.google.com/p/selenium/wiki/Grid2
Java commands to start Grid2:
java -jar selenium-server-standalone-2.13.0.jar -role hub
java -jar selenium-server-standalone-2.13.0.jar -role node -hub
http://localhost:4444/grid/register
Grid Hub shows up correctly in http://localhost:4444/grid/console

Grid2 only works when I call SeleneseCommandExecutor:
DesiredCapabilities capabilities = DesiredCapabilities.firefox();
CommandExecutor executor = new SeleneseCommandExecutor(
new URL("http://localhost:5555"), new URL("http://
www.google.com"), capabilities);
driver = new RemoteWebDriver(executor, capabilities);

If I change the above lines to:
DesiredCapabilities capabilities = DesiredCapabilities.firefox();
driver = new RemoteWebDriver(new URL("http://localhost:4444/wd/
hub" ), capabilities);
a blank browser shows up and I got the following error:

org.openqa.selenium.WebDriverException: Error communicating with the
remote browser. It may have died.
Build info: version: '2.13.0', revision: '14794', time: '2011-11-18
17:49:47'
System info: os.name: 'Windows XP', os.arch: 'x86', os.version: '5.1',
java.version: '1.7.0_01'
Driver info: driver.version: RemoteWebDriver
at
org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:
412)
at
org.openqa.selenium.remote.RemoteWebDriver.startSession(RemoteWebDriver.java:
118)
at
org.openqa.selenium.remote.RemoteWebDriver.<init>(RemoteWebDriver.java:
79)
at
org.openqa.selenium.remote.RemoteWebDriver.<init>(RemoteWebDriver.java:
87)
at tmp.setUp(tmp.java:36)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.junit.runners.model.FrameworkMethod
$1.runReflectiveCall(FrameworkMethod.java:45)
at
org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:
15)
at
org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:
42)
at
org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:
27)
at
org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:
30)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:263)
at
org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:
68)
at
org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:
47)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:50)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222)
at org.junit.runners.ParentRunner.run(ParentRunner.java:300)
at
org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:
49)
at
org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:
38)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:
467)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:
683)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:
390)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:
197)
Caused by: org.apache.http.conn.HttpHostConnectException: Connection
to http://localhost:4444 refused
at
org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:
158)
at
org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:
149)
at
org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:
121)
at
org.apache.http.impl.client.DefaultRequestDirector.tryConnect(DefaultRequestDirector.java:
573)
at
org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:
425)
at
org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:
820)
at
org.openqa.selenium.remote.HttpCommandExecutor.fallBackExecute(HttpCommandExecutor.java:
392)
at
org.openqa.selenium.remote.HttpCommandExecutor.execute(HttpCommandExecutor.java:
371)
at
org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:
398)
... 28 more
Caused by: java.net.ConnectException: Connection refused: connect
at java.net.TwoStacksPlainSocketImpl.socketConnect(Native Method)
at java.net.AbstractPlainSocketImpl.doConnect(Unknown Source)
at java.net.AbstractPlainSocketImpl.connectToAddress(Unknown Source)
at java.net.AbstractPlainSocketImpl.connect(Unknown Source)
at java.net.PlainSocketImpl.connect(Unknown Source)
at java.net.SocksSocketImpl.connect(Unknown Source)
at java.net.Socket.connect(Unknown Source)
at
org.apache.http.conn.scheme.PlainSocketFactory.connectSocket(PlainSocketFactory.java:
123)
at
org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:
148)
... 36 more

java.lang.NullPointerException
at tmp.tearDown(tmp.java:66)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.junit.runners.model.FrameworkMethod
$1.runReflectiveCall(FrameworkMethod.java:45)
at
org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:
15)
at
org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:
42)
at
org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:
36)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:263)
at
org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:
68)
at
org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:
47)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:50)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222)
at org.junit.runners.ParentRunner.run(ParentRunner.java:300)
at
org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:
49)
at
org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:
38)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:
467)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:
683)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:
390)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:
197)

Thanks,
Henry

Krishnan Mahadevan · « **Reply #1 on:** April 01, 2012, 06:37:47 PM »

Henry,
I have been using Grid for quite sometime and I havent faced any problems.
The stacktrace mentions "connection refused".

Are you running your code in the same machine as where grid exists or is it
in a different machine ?

Thanks & Regards
Krishnan Mahadevan

"All the desirable things in life are either illegal, expensive, fattening
or in love with someone else!"

- Show quoted text -

Frank Escobar · « **Reply #2 on:** April 01, 2012, 06:38:00 PM »

I have the same problem. I think that the problem are the differents
speeds of each browser. For example: Internet Explorer is slower than
Firefox.
The temporary solution that I applied is create a thread that wait while
load the page:
Thread.sleep(3000);

*Exist some method that wait the load page according the browser?*
*
*

On Wed, Nov 30, 2011 at 4:24 AM, Krishnan Mahadevan <

- Show quoted text -

--
*Frank Escobar | QA Analyst | GlobalLogic Inc.*
*Leaders in Software R&D Services*
*ARGENTINA | CHILE | CHINA | INDIA | ISRAEL | UKRAINE | UK | USA
485 Av Corrientes, 6th floor - Bs. As.
**Home: +54-261-4290866 **| ...
read more »

Selenium Webdriver · « **Reply #2 on:** April 01, 2012, 06:38:00 PM »

h k · « **Reply #3 on:** April 01, 2012, 06:38:14 PM »

Krishnan,
Same machine as the grid.

Henry

On Nov 29, 11:24 pm, Krishnan Mahadevan

- Show quoted text -

h k · « **Reply #4 on:** April 01, 2012, 06:38:26 PM »

Frank,
Where do you add Thread.sleep(3000) ? The error is at the 2nd line
"driver = ..." shown below:

DesiredCapabilities capabilities = DesiredCapabilities.firefox();
driver = new RemoteWebDriver(new URL("http://localhost:4444/wd/
hub" ), capabilities); // ERROR at this line

Henry

On Nov 30, 5:54 am, Frank Escobar <fescobar.syst...@gmail.com> wrote:

- Show quoted text -

... read more »

Mike · « **Reply #5 on:** April 01, 2012, 06:38:40 PM »

Don't bother, because adding a sleep won't help, plus it is not the
way to write test code. You are failing to properly start the browser
in the first place. IT sounds like it sort of starts and then can't
communicate.
I seem to recall having a problem when I was using the name
"localhost" as you are here. Try using the IP: 127.0.0.1

My code passes the IP address for the hub as a parameter from the
command line, as well as the port to use, but here is how I am
invoking it:
driver = new RemoteWebDriver(new URL("http://" + host + ":" + port
+ "/wd/hub"), capability);

And Frank, try waiting for the title to change or an expected element
from the destination web page to be present. Your test will run much
faster than if you scatter sleeps throughout your code. It is okay to
sleep for .1 seconds or so in between checks, just to be sociable so
other tasks can run while you are waiting.

Mike

On Nov 30, 10:06 am, h k <hhk0...@gmail.com> wrote:

- Show quoted text -

h k · « **Reply #6 on:** April 01, 2012, 06:38:54 PM »

Mike,
You are right. It's a connection problem, partially connected since a
blank browser shows up. I tried replacing "localhost" with the IP
address of my machine, but to no avail.

Henry

On Nov 30, 10:30 am, Mike <lvskip...@cox.net> wrote:

- Show quoted text -

Krishnan Mahadevan · « **Reply #7 on:** April 01, 2012, 06:39:09 PM »

Henry,
Just a guess. Have you tried using your actual IP address instead of
127.0.0.1 and see if that works ? (you can get the ip by using the ipconfig
command)

Alternatively I think you can perhaps try exploring altering your hosts
file under c:\windows\system32\drivers\etc\hosts directory to explicitly
refer to your local host machine and see if that helps as well?
Thanks & Regards
Krishnan Mahadevan

"All the desirable things in life are either illegal, expensive, fattening
or in love with someone else!"

- Show quoted text -

h k · « **Reply #8 on:** April 01, 2012, 06:39:24 PM »

Krishnan,
Same problem with localhost or the actual IP address of my machine.

Henry

On Nov 30, 8:46 pm, Krishnan Mahadevan

- Show quoted text -

Krishnan Mahadevan · « **Reply #9 on:** April 01, 2012, 06:39:41 PM »

I am out of options

Thanks & Regards
Krishnan Mahadevan

"All the desirable things in life are either illegal, expensive, fattening
or in love with someone else!"

- Show quoted text -

Panchdev Chauhan · « **Reply #10 on:** April 01, 2012, 06:39:58 PM »

Just tell me which version of firefox installed on node machine.
Inform you in advance that If FF version is 8.0.1 on XP, it will not work.
Because 8.0.1 is not been supported yet. If this is the case Please change
you FF to 7.0.0. and try out. definitely It will work. Enjoy.

On Fri, Dec 2, 2011 at 9:06 AM, Krishnan Mahadevan <

- Show quoted text -

--
Regards,
*PANCHDEV CHAUHAN*
Software Engineer in Test
*"Quality is the job I do."*
*
*
@nuFuture Digital (India) Limited.
@Mobile: 88 66 268 514
@Public Profile: http://in.linkedin.com/pub/panchdev-chauhan/18/290/325

*
*

Krishnan Mahadevan · « **Reply #11 on:** April 01, 2012, 06:40:18 PM »

@Panchdev

Per the changelogs of Selenium2
http://selenium.googlecode.com/svn/trunk/java/CHANGELOG
Selenium2 does support Firefox 8.0.1

I have got it to work using Selenium 2.13 on a Mac using Firefox 8.0.1

The issue here is not related to the browser, but for the fact that the
user is not able to spawn a grid itself.

If you go back and take a look at the original post, in the stack trace you
will notice this

Caused by: org.apache.http.conn.HttpHostConnectException: Connection to
http://localhost:4444refused

Thanks & Regards
Krishnan Mahadevan

"All the desirable things in life are either illegal, expensive, fattening
or in love with someone else!"

On Fri, Dec 2, 2011 at 3:59 PM, Panchdev Chauhan <erpanch...@gmail.com>wrote:

- Show quoted text -

h k · « **Reply #12 on:** April 01, 2012, 06:40:38 PM »

I'm using Firefox 3.6.24 on Windows XP. Same connection refused using
Selenium 2.13 and 2.14. Any idea why connection was refused?
Thanks,
Henry

On Dec 2, 2:34 am, Krishnan Mahadevan

- Show quoted text -

h k · « **Reply #13 on:** April 01, 2012, 06:40:58 PM »

Found out Grid2 has problem in Windows XP SP3. Bug filed is:
http://code.google.com/p/selenium/issues/detail?id=3109
OK in other OS'es like Windows XP SP2, Windows 7, Mac OS.

Henry

On Dec 2 2011, 8:35 am, h k <hhk0...@gmail.com> wrote:

- Show quoted text -

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