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WebDriver, ChromeDriver, Selenium, and Jenkins Integration

I have a selenium script written in eclipse, which invokes a ChromeDriver that launches a URL, reads title and closes the browser. I'm able to successfully execute this in Eclipse and also at a command prompt.
However, when I create a Jenkins job with a build routine (via execute batch command) the build keeps running for a long time. Upon tracing with sysout statements, I found that the build is stopping at drive.get()
driver.get("google.com");
The build fails with the error message below after waiting for a long time:
Starting ChromeDriver 2.15.322448 (52179c1b310fec1797c81ea9a20326839860b7d3) on port 39626
Only local connections are allowed.
[304.538][SEVERE]: Timed out receiving message from renderer: 298.714
[904.539][SEVERE]: Timed out receiving message from renderer: 600.000
[914.540][SEVERE]: Timed out receiving message from renderer: 10.000
Build step 'Execute Windows batch command' marked build as failure
Finished: FAILURE

Selenium Webdriver actually needs display to work (X server to be accurate).
You can use Xvfb to run it in a headless mode, detailed instruction (a bit outdated, but still valid) - http://alex.nederlof.com/blog/2012/11/19/installing-selenium-with-jenkins-on-ubuntu/

You have to change the code to
driver.get("http://google.com");
you must have seen error running from eclipse and command prompt.

Boot2Docker TLS issue with buildDocker

I am exploring docker to deploy my dockerized java sample project on windows7 using boot2Docker. When I am building the dockerized java app using command ./gradlew build buildDocker. I am getting an issue as follows:
Execution failed for task ':buildDocker'.
> javax.net.ssl.SSLPeerUnverifiedException: peer not authenticated
My build.gradle file had docker settings as follows:
docker {
useApi true
hostUrl 'https://192.168.59.103:2376'
}
I searched for some probable solution for the same and got this link. I tried both the workarounds but none working for me. For the first approach i.e. changing profile and tried building again the project also failed with above error.
In the second workaround, I tried to install and run
$(docker run sequenceiq/socat)
the command downloaded the package and runned as well. But when I tried to check the running images using command docker ps, Nothing came in result set.
After that I tried pinging using curl http://192.168.59.103:2375/_ping returned error as curl: (7) Failed to connect to 192.168.59.103 port 2375: Connection refused
Anyway I changed my docker configuration in build.gradle file as follows:
docker {
useApi true
hostUrl 'http://192.168.59.103:2375'
}
And run the build command i.e. ./gradlew build buildDocker again to get below error:
Execution failed for task ':buildDocker'.
> org.apache.http.conn.HttpHostConnectException: Connection to http://192.168.59
.103:2375 refused.
So it seems both the workaround is not working for me. Any one faced the same and have any clue about what I am missing here.

Error when push Liberty for Java application in IBM Bluemix

when I run sample IBM Bluemix Liberty for Java application https://github.com/ibmjstart/bluemix-java-postgresql-uploader.git following error:
-----> Downloaded app package (1.9M)
-----> Downloaded app buildpack cache (4.0K)
OK
/var/vcap/packages/dea_next/buildpacks/lib/buildpack.rb:101:in build_pack': Unable to detect a supported application type (RuntimeError) from /var/vcap/packages/dea_next/buildpacks/lib/buildpack.rb:74:inblock in compile_with_timeout'
from /usr/lib/ruby/1.9.1/timeout.rb:68:in timeout' from /var/vcap/packages/dea_next/buildpacks/lib/buildpack.rb:73:incompile_with_timeout'
from /var/vcap/packages/dea_next/buildpacks/lib/buildpack.rb:54:in block in stage_application' from /var/vcap/packages/dea_next/buildpacks/lib/buildpack.rb:50:inchdir'
from /var/vcap/packages/dea_next/buildpacks/lib/buildpack.rb:50:in stage_application' from /var/vcap/packages/dea_next/buildpacks/bin/run:10:in'
FAILED
Server error, status code: 400, error code: 170001, message: Staging error: cannot get instances since staging failed
TIP: use 'cf logs jpu-henryhan --recent' for more information

The top error looks like you left off the -p <path_to_war> parameter when doing a push. If you just push a directory containing a WAR file, it will not be detected by the Java buildpack.

The tip provided in the output of your cf push request is relevant.
TIP: use 'cf logs jpu-henryhan --recent' for more information
Running that command will tail the log files produced during the staging process and let you see what error may have been raised. Often, it can be a missing dependency or a transient failure of some sort.
I just successfully deployed the sample using the "deploy to Bluemix" button and manually via the cf command line tool. Unless you changed the code, it is most likely that this error is a transient failure.

Run following command:
$ cf push jpu- -b https://github.com/cloudfoundry/java-buildpack --no-manifest --no-start -p PostgreSQLUpload.war
add the parameter to set the buildpack "-b https://github.com/cloudfoundry/java-buildpack"

Running MapReduce job written in Java through my PHP web page

My PHP server is hosted on Job Tracker machine and I am trying to run the map reduce job through my web page by calling the command line executing the jar command,
but I am getting no response and job is not starting.
However if I run a command to list the hdfs using same methodology it is running fine. Please guide me.
Following command is not responding me anything and job is not running:
exec("HADOOP_DIR/bin/hadoop jar /usr/local/MapReduce.jar Mapreduce [input Path] [output Path]");
But if I do this:
exec("HADOOP_DIR/bin/hadoop dfs -ls /user/hadoop");
It is running fine.

I solved this problem by changing the php server user to hduser (user which has permission to write files in hdfs). without changing this user only the commands which reads from the hdfs were working and not the one which needs to create the files or write on hdfs.
When i tried to run the command for creating the directory in hdfs through my php script, I got the following error in my php server logs (/var/log/apache2/error.log):
mkdir: org.apache.hadoop.security.AccessControlException: Permission denied: user=www-data, access=WRITE, inode="hduser":hduser:supergroup:rwxr-xr-x
And on running the Jar command to trigger MapRed program I got the following error:
Exception in thread "main" java.io.IOException: Permission denied
at java.io.UnixFileSystem.createFileExclusively(Native Method)
at java.io.File.createTempFile(File.java:1879)
at org.apache.hadoop.util.RunJar.main(RunJar.java:115)
Then what i did is i changed the user in /etc/apache2/apache2.conf to my hadoop user and then restarted my server and every thing was working fine now.
I should reference Execute hadoop jar from PHP Server fails. Permission denied post which helped me alot in solving this problem. I hope this post helps others too.

Batch file run command after previous command has finished executing

I am trying to clear a batch file, which does some Weblogic Admin server data source update after which I need to restart the admin server..I am trying to automate the same through batch file...So I have;
call wlst UpdateDataSource.py
stopWebLogic.cmd weblogicUser weblogicPwd localhost:7001
startWebLogic.cmd
Now, how do I ensure that startWebLogic.cmd is executed only after the previous line has finished executing (i.e. after stopWebLogic.cmd finishes)

I'm assuming Windows, since you have .cmd files!?
You can use & between the scripts to run them in sequence. If you use && the ensuing scripts will only run if the previous ones completed successfully.
You can read more here.
Cheers,