Is there any specific reason why we use GridlauncherV3, Currently doing a project where I use custom servlets for executing some task
For launching node:
java -Dwebdriver.chrome.driver=chromedriver -cp testservlet.jar:selenium-server-standalone.jar org.openqa.grid.selenium.GridLauncherV3 -role node -maxSession 10 -port 4444 -host localhost -hub http://localhost:4444/grid/register -browser browserName=chrome,version=103,platform=LINUX,maxInstances=10 -servlets testservlet.copies.DemoServlet,testservlet.copies.Demo2Servlet
Couldn't find any reason but if removed it throws an error, Were it needs a params
Unrecognized option: -role
Error: Could not create the Java Virtual Machine.
Error: A fatal exception has occurred. Program will exit.
Thanks in advance.
As you are using are using java -cp, it is a requirement to specify the class that contains the main() method.
In the case of creating a jvm to run as selenium grid, you require the class that contains the main() method, in this case that is org.openqa.grid.selenium.GridLauncherV3.
This method is used to initiate the grid with all the required configuration in your cli command.
See the method here: GridLauncherV3
Related
I am using AWS EC2 instances to create a Selenium Grid. I have one instance acting as the Hub and other instances acting as nodes.
Once I terminate the nodes, they still remain in the grid for quite sometime (like 15-20 minutes) before being completely removed, therefore, the API is returning incorrect values:
For example, the API is returning:
"slotCounts": {
"free": 9,
"total": 10
},
But really, there are ONLY 4 slots total, because the other nodes are no longer connected. Is there a configuration setting that will remove the nodes from grid faster after there is no longer a connection?
I start the Hub like this:
java -jar selenium-server-standalone-3.141.59.jar -role hub -port 4444;
And the clients like this:
java -jar -Dwebdriver.chrome.driver=chromedriver selenium-server-standalone-3.141.59.jar -role node -hub http://10.0.1.119:4444/grid/register -browser browserName=chrome,maxInstances=2,version=latest,seleniumProtocol=WebDriver
The nodes do eventually disappear from the grid but only after they have been quit (by quit, I mean after the computer that runs the node has been shutdown) for quite awhile (maybe 10-20 mins).
I looked at this Stack Overflow question: SO
And I can't figure out if I need to set nodePolling, timeout, browsertimout or a combination of them?
Update:
I just tested it again, and after the computer that runs the nodes was shutdown, it took around 20-22 mins for the grid to reflect that in the API.
As per the Selenium Grid helptext:
-timeout, -sessionTimeout
<Integer> in seconds : Specifies the timeout before the server
automatically kills a session that hasn't had any activity in the last X
seconds. The test slot will then be released for another test to use.
This is typically used to take care of client crashes. For grid hub/node
roles, cleanUpCycle must also be set. If a node does not specify it, the
hub value will be used.
So once the nodes are terminated to remove them completely from the console you can configure either of the following parameters:
-timeout
java -jar -Dwebdriver.chrome.driver=chromedriver selenium-server-standalone-3.141.59.jar -role node -hub http://192.168.225.173:4444/grid/register -browser browserName=chrome,maxInstances=2 -timeout 2
-sessionTimeout:
java -jar -Dwebdriver.chrome.driver=chromedriver selenium-server-standalone-3.141.59.jar -role node -hub http://192.168.225.173:4444/grid/register -browser browserName=chrome,maxInstances=2 -sessionTimeout 3
cleanUpCycle:
java -jar -Dwebdriver.chrome.driver=chromedriver selenium-server-standalone-3.141.59.jar -role node -hub http://192.168.225.173:4444/grid/register -browser browserName=chrome,maxInstances=2 -cleanUpCycle 4
References
You can find a couple of relevant detailed discussions in:
Is there a way too prevent selenium automatically terminating idle sessions?
I have register two platform with chrome browser on windows 7 and windows 10 into selenium grid server.
I want to run a test at Chrome browser on Windows 10 but when i run the test, the test randomly run on Windows 7 and randomly run on Windows 10 on chrome.
Do you have an idea how to do the configuration to run the test on specific browser and platform when we have registered multiple platform?
hub:
java -jar selenium-server-standalone-3.7.1.jar -role hub
register node on windows 7:
java -Dwebdriver.chrome.driver=chromedriver_2.33.exe -jar selenium-server-standalone-3.7.1.jar -role node -hub http://localhost:4444
register node on windows 10:
java -Dwebdriver.chrome.driver=chromedriver_2.33.exe -jar selenium-server-standalone-3.7.1.jar -role node -hub http://localhost:4444
protractor.conf.js
exports.config = {
specs: [
'**/*.mytest.e2e-spec.ts'
],
multiCapabilities: [
{
browserName: 'chrome',
platform: 'WIN10',
}
],
seleniumAddress: 'http://localhost:4444/wd/hub',
baseUrl: 'http://localhost:4200/',
framework: 'jasmine',
jasmineNodeOpts: {
print: function () {
}
},
onPrepare: function () {
require('ts-node').register({
project: 'e2e/tsconfig.e2e.json'
});
}
};
Selenium Grid Installation Process:-
Download Selenium server standalone jar file in which you want to
create Hub
Create a new java project and add it to build path
Start the Hub Using Below Command in your machine:-
java -jar selenium-server-standalone-3.9.1.jar –role hub -port 4446
Open ip address/grid/console in host browser "or" localhost: portnumber/grid/console
Start the Node Using Below Command in another machine:
Download Selenium server standalone jar file in another laptop
it is not necessary that node contains eclipse. But Java Should be installed.
go to file path where selenium standalone is kept
Type Below command
java -jar selenium-server-standalone-3.9.1.jar –role webdriver –hub ipaddress/grid/
register –port 5566
(but Here your test will fail because here file path for chrome Driver or gecko driver is not provided in the hub.)
java –Dwebdriver.chrome.driver="provide path for chrome driver" -jar selenium-server-standalone-3.9.1.jar –role webdriver –hub ipaddress/grid/register –port 5566
I would suggest that you do the following
Create a node configuration file as seen here, wherein for the WINDOWS7 node, you specify the appropriate platform (make sure you pick a value from here)
Now you start off the node by specifying this newly created nodeConfig json using the command line parameter -nodeConfig node.json ( For more details refer to my blog post here )
Now based on the PLATFORM capabilities specified by your test, it would be routed to the appropriate node.
You need to tweak the commands for registering the nodes as follows :
Register node on Windows 7:
java -Dwebdriver.chrome.driver=chromedriver_2.33.exe -jar selenium-server-standalone-3.7.1.jar -role node -hub http://localhost:4444/grid/register
Register node on Windows 10:
java -Dwebdriver.chrome.driver=chromedriver_2.33.exe -jar selenium-server-standalone-3.7.1.jar -role node -hub http://localhost:4444/grid/register
As per your question and DebanjanB answer, You have two nodes and two hubs. You need to register the nodes with same hub. Please try with following configuration, it may works.
Start your hub on windows 7 Machine with following command,
java -jar selenium-server-standalone-3.7.1.jar -role hub
Start/register your first node on windows 7 with following command,
java -Dwebdriver.chrome.driver=chromedriver_2.33.exe -jar selenium-server-standalone-3.7.1.jar -role node
start/register your second node on windows 10 with following command,
java -Dwebdriver.chrome.driver=chromedriver_2.33.exe -jar selenium-server-standalone-3.7.1.jar -role node -hub http://"IP Address OF Windows 7 machine":4444/grid/register
To verify the nodes are listed on hub, just open the url http://localhost:4444/grid/console on windows 7 machine. Then, verify your nodes are listed on the page.
You have to run your script from the windows 7 machine because your selenium address is using localhost address( seleniumAddress: 'http://localhost:4444/wd/hub'). if you want to run from windows 10 machine or any other machine. change the selenium address as 'http://"windows7ipaddress":4444/wd/hub' in config file.
I have tested it on my machine it is working fine. It will start the chrome on windows 10 machine as your multiCapabilities platform value is WIN10.
note: replace the value of ip address value in place where ever required.
I've been using the selenium-server-standalone-2.53.0.jar and recently tried to upgrade to version 3.0.0-beta3.
I'm attempting to spin-up a hub using the maxInstances parameter with the following command:
java -jar %~dp0DriverRepo\selenium-server-standalone-3.0.0-beta3.jar -role hub -port 5555 -maxInstances 9
This was working in 2.53.0, but in 3.0.0-beta3 I'm met with the following exception:
Exception in thread "main" com.beust.jcommander.ParameterException: Unknown option: -maxInstances
at com.beust.jcommander.JCommander.parseValues(JCommander.java:742)
at com.beust.jcommander.JCommander.parse(JCommander.java:282)
at com.beust.jcommander.JCommander.parse(JCommander.java:265)
at com.beust.jcommander.JCommander.<init>(JCommander.java:210)
at org.openqa.grid.selenium.GridLauncherV3$2.setConfiguration(GridLauncherV3.java:224)
at org.openqa.grid.selenium.GridLauncherV3.buildLauncher(GridLauncherV3.java:138)
at org.openqa.grid.selenium.GridLauncherV3.main(GridLauncherV3.java:67)
Apparently maxInstances is no longer a valid argument. I've searched for documentation regarding any changes that may have been made for use of the maxInstances parameter but I've had no luck. Has anyone else run into this issue, or is anyone aware of the proper way to spin-up a hub in 3.0.0-beta3 in a comparable way?
I don't remember ever using an argument called maxInstances. I think that earlier there was no validation for invalid command line arguments but with Selenium 3, they perhaps enabled it.
Here's an example of why I feel my theory is true
Selenium 2.53.1 output wherein I am providing an invalid argument named krishnan
selenium-server -role hub -krishnan 100
22:28:37.762 INFO - Launching Selenium Grid hub
2016-09-26 22:28:38.366:INFO::main: Logging initialized #758ms
22:28:38.378 INFO - Will listen on 4444
22:28:38.421 INFO - Will listen on 4444
2016-09-26 22:28:38.424:INFO:osjs.Server:main: jetty-9.2.z-SNAPSHOT
2016-09-26 22:28:38.452:INFO:osjsh.ContextHandler:main: Started o.s.j.s.ServletContextHandler#32eebfca{/,null,AVAILABLE}
2016-09-26 22:28:38.479:INFO:osjs.ServerConnector:main: Started ServerConnector#6ec8211c{HTTP/1.1}{0.0.0.0:4444}
And here's how Selenium 3 beta version behaves for the same command line.
java -jar selenium-server-standalone-3.0.0-beta2.jar -role hub -krishnan 100
Exception in thread "main" com.beust.jcommander.ParameterException: Unknown option: -krishnan
at com.beust.jcommander.JCommander.parseValues(JCommander.java:742)
at com.beust.jcommander.JCommander.parse(JCommander.java:282)
at com.beust.jcommander.JCommander.parse(JCommander.java:265)
at com.beust.jcommander.JCommander.<init>(JCommander.java:210)
at org.openqa.grid.selenium.GridLauncherV3$2.setConfiguration(GridLauncherV3.java:216)
at org.openqa.grid.selenium.GridLauncherV3.buildLauncher(GridLauncherV3.java:130)
at org.openqa.grid.selenium.GridLauncherV3.main(GridLauncherV3.java:67)
Selenium has never had any argument named maxInstances. It only had something called maxSession`.
The only usage for maxInstances has been within a node configuration file as shown here which is passed to a Selenium node via the -nodeConfig argument. This represents the number of concurrent browser instances per browser flavor that can be opened up in a node.
My scenario is, I will launch a instance of a browser and perform some operations and then without closing current browser new browser of same type will be opened and verification needs to be done.
Webdriver driver = driverInitialize.getDriver();
//Perform some operations
Webdriver driver2 = driverInitialize.getDriver();
//Perform some operations
The problem is only with firefox and IE as second instance of browser is not getting launched till the timeout of first instance happens but the same works fine with chrome browser. On launching the node and hub, for firefox and IE it says "WARN - Max instance not specified. Using default = 1" even after specifying the maximum instance in the respective nodes. The commands used for launching hub and node is presented below
Hub : java -jar selenium-server-standalone-2.44.0.jar -role hub -port 4444
Firefox Node : java -jar selenium-server-standalone-2.44.0.jar -role node -hub http://127.0.0.1:4444/grid/register -port 5553 -browser browserName=firefox,maxInstance=5 -Dwebdriver.version="30"
IE Node : java -jar selenium-server-standalone-2.44.0.jar -role webdriver -hub http://127.0.0.1:4444/grid/register -port 5555 browserName=ie,maxInstance=5 -Dwebdriver.ie.driver="C:\IEDriverServer.exe"
Chrome Node : java -jar selenium-server-standalone-2.44.0.jar -role webdriver -hub http://127.0.0.1:4444/grid/register -port 5555 browserName=chrome maxInstance=5 -Dwebdriver.chrome.driver="C:\chromedriver.exe"
Versions of browser
Chrome : 40.0.2214.115; Firefox : 34.0; IE : 10.0.9200.17228;
I think you should take a look at this stack overflow question:
Selenium Grid: MaxSessions vs MaxInstances
Max sessions will override max instances, so you need to set both.
If you have max sessions = 1 and max instances = 10, only 1 test will be allowed to run. Check your configuration in this case.
You can also see these options on the Grid 2 wiki:
https://code.google.com/p/selenium/wiki/Grid2
EDIT**
This has moved to: https://github.com/SeleniumHQ/selenium/wiki/Grid2
Ok, I have already several testcases written for Webdriver approach. But now I need get the Selenium Grid for possible stress testing of the webapp.
I found this demo but its unable to control the Firefox 11. Then I found out this wiki page which is two level higher than I can understand, but that JAR File is supposedly able to control the Firefox 11.
What I need - some resources how to get the Grid started and how to let it do simple test - like writing "Hello World" into Google search bar and then clicking "Search."
EDIT
This is the error when I am trying to run the grid as node
D:\_dev\selenium-grid-1.0.8\lib>java -jar selenium-server-standalone-2.20.0.jar -role node -hub http://localhost:4444/grid/register
22-Mar-2012 10:33:48 org.openqa.grid.selenium.GridLauncher main
INFO: Launching a selenium grid node
Exception in thread "main" java.lang.NoSuchMethodError: java.lang.String.isEmpty()Z
at org.openqa.grid.common.RegistrationRequest.getRemoteControlConfiguration(RegistrationRequest.java:585)
at org.openqa.grid.internal.utils.SelfRegisteringRemote.startRemoteServer(SelfRegisteringRemote.java:86)
at org.openqa.grid.selenium.GridLauncher.main(GridLauncher.java:72)
And this is output from server which seems ok
D:\_dev\selenium-grid-1.0.8\lib>java -jar selenium-server-standalone-2.20.0.jar -role hub
22-Mar-2012 10:33:33 org.openqa.grid.selenium.GridLauncher main
INFO: Launching a selenium grid server
360 [main] INFO org.seleniumhq.jetty7.server.Server - jetty-7.x.y-SNAPSHOT
422 [main] INFO org.seleniumhq.jetty7.server.handler.ContextHandler - started o.s.j.s.ServletContextHandler{/,null}
438 [main] INFO org.seleniumhq.jetty7.server.AbstractConnector - Started SocketConnector#0.0.0.0:4444
If you are working with windows, you need to add the path to firefox to your PATH environment variable. The reason for this is, that windows then knows what program to start, when you call firefox from command line, for example.
Then you need to donwload the selenium server standalone and then start the hub
java -jar selenium-server-standalone-2.20.0.jar -role hub
and also the client:
java -jar selenium-server-standalone-2.20.0.jar -role node -hub http://localhost:4444/grid/register
Now you need to create a new Java Project in Eclipse, for example like so:
class MyFristTest{
//using the #test annotation tells eclipse
//to use junit (or tells you to import it)
#Test
public void myTest(){
Selenium selenium = new DefaultSelenium(“localhost”, 4444, “*firefox”, “http://www.google.com”);
DesiredCapabilities capability = DesiredCapabilities.firefox();
WebDriver driver = new RemoteWebDriver(new URL("http://localhost:4444/wd/hub"), capability);
driver.get("http://www.example.com");
driver.findElement(By.linkText("RFC 2606")).click();
driver.findElement(By.linkText("txt")).click();
}
If you now start the JUnit Test, it should magically work.