xvfb-run: line 171: kill: (25939) - No such process

Question

All automated test runs successfully. but xvfb issue causes the build failure in Jenkins.

I have used below commnad in ExecuteShell option available under Jenkins to run my test cases on headless browser

/usr/bin/xvfb-run /usr/local/apache-maven-3.3.1/bin/mvn clean test -Dbrowser=firefox 

Getting the below output:

Results :

Tests run: 22, Failures: 0, Errors: 0, Skipped: 0


[INFO] BUILD SUCCESS

[INFO] Total time: 10:19 min

[INFO] Final Memory: 20M/47M


/usr/bin/xvfb-run: line 171: kill: (25939) - No such process

Build step 'Execute shell' marked build as failure

As we can see in the output [INFO] BUILD SUCCESS. But /usr/bin/xvfb-run: line 171: kill: (25939) - No such process causes the builld failure.

Could anybody please provide some workaround for this?

Answer 1

I had this same problem when trying to run wkhtmltopdf thru xvfb-run.

In my PHP script, I executed /usr/bin/xvfb-run /usr/bin/wkhtmltopdf ... several times in the same script. The first one always worked, but the second one failed consistently with the same error you posted about.

Adding -e /tmp/xvfb.log to the second command revealed this in the log:

Fatal server error: (EE) Server is already active for display 99 If this server is no longer running, remove /tmp/.X99-lock and start again.

The solution in my case was to add the -a flag to the command:

/usr/bin/xvfb-run -a /usr/bin/wkhtmltopdf ...

Which will tell xvfb-run to "try to get a free server number, starting at --server-num".