Flatform: OS: mac OS Mojave(10.14.6)

 The build step execute shell contains fastlane build command to build Xcode app.

It uses fastlane and cocoapods using ram ruby.

fastlane Ruby  executes script to build the Xcode app. After the build step completion, randomly, Jenkins leaves sub processes on system which consumes memory.  

Process tree -1

M2:~ jenkins$ ps -ef | grep ruby

  502  2186     1   0 Thu01PM ??         0:07.62 ruby /Users/jenkins/.rvm/gems/ruby-2.6.3/bin/fastlane debugAdHoc   

  502  2779  2776   0 Thu01PM ??         0:00.00 (ruby)

  502 54343   1   0 Thu09AM ??         0:02.69 ruby /Users/jenkins/.rvm/gems/ruby-2.6.3/bin/fastlane unitTestsBuild scheme:xxx-Debug    

 

 

Process tree -2

 

M2:~ jenkins$ ps -ef | grep 54343

  502 54343     1   0 Thu09AM ??         0:02.69 ruby /Users/jenkins/.rvm/gems/ruby-2.6.3/bin/fastlane unitTestsBuild scheme:xxx-Debug    

  502 54398 54343   0 Thu09AM ??         0:00.00 (sh)

  502  9764  9297   0  1:26PM ttys001    0:00.00 grep 54343

 

 

Process tree -3

 

M2:~ jenkins$ ps -ef | grep 54398

  502 54398 54343   0 Thu09AM ??         0:00.00 (sh)

  502 54399 54398   0 Thu09AM ??         0:00.00 (xcodebuild)

  502 54400 54398   0 Thu09AM ??         0:00.00 (tee)

  502 54401 54398   0 Thu09AM ??         0:00.00 (ruby)

  502  9760  9297   0  1:26PM ttys001    0:00.00 grep 54398

 

Process treee -4

 

M2:~ jenkins$ ps -ef | grep 54399

  502 54399 54398   0 Thu09AM ??         0:00.00 (xcodebuild)

  502 54578 54399   0 Thu09AM ??         0:00.00 (ibtool)

  502 56436 54399   0 Thu09AM ??         0:00.00 (bash)

  502  9669  9297   0  1:26PM ttys001    0:00.00 grep 54399

 

Process tree -5

M2:~ jenkins$ ps aux | awk '{ print $8 " " $2 }' | grep -w Z

Z 2896

Z 54578

I tried to execute the following commands in  next to the fastlane command step. But unable to kill the processes created by the execute shell.

At beginning of shell

export PROCESS_ID=`echo $$` # capture the shell process id

At the end of shell build step

bundle exec fastlane debugAdHocBuild

 

export ID=`pgrep -P $PROCESS_ID` # list the process ids of shell process id,

echo "ID=$ID"

kill -9 $ID || true

Where as ID could not retrieve any processes.

 

When we run ps -jA | grep PROCESS_ID on terminal, it is showing the ruby process and its subprocesses.

 

 

The subprocess “ruby” become orphan and tagged to init process.