Jenkins gerrit trigger not fetching my change while building

Question

I have configured jenkins with gerrit trigger plugin to validate every commit we push to gerrit. I am expecting this trigger to include my latest change with original repo and make a build. But, it is cloning only repo project and compiling without my change.

Below is my configuration settings for gerrit trigger in jenkins.

Refspec: $GERRIT_REFSPEC 
Branches to build: $GERRIT_BRANCH 
Build trigger: Gerrit event 
Trigger on: patch set created 
Gerrit project: added project and branch

Below is the build output message

Triggered by Gerrit: http://ci-test1/22
Building on master in workspace /var/lib/jenkins/jobs/Build_Adserver_4.7/workspace
Checkout:workspace / /var/lib/jenkins/jobs/Build_Adserver_4.7/workspace - hudson.remoting.LocalChannel@733aee56
Using strategy: Default
Last Built Revision: Revision 701a75ef38aa191ac1b806c48e6b3451671888f6 (ads/4.7)
Fetching changes from 1 remote Git repository
Fetching upstream changes from abc
Commencing build of Revision 701a75ef38aa191ac1b806c48e6b3451671888f6 (ads/4.7)
Checking out Revision 701a75ef38aa191ac1b806c48e6b3451671888f6 (ads/4.7)
[workspace] $ /bin/sh -xe /tmp/hudson1375188638196718521.sh
+ echo 'Started Build'
Started Build
+ echo ..................
..................
+ echo 'Build Finished'
Build Finished
Finished: SUCCESS

Here 701a75ef38aa191ac1b806c48e6b3451671888f6 is HEAD of repo branch and 8cbda558adcad4fb7eb714e0b3fb98a6fbf5811c is the SHA-id of my latest change trigged the build.

I verified from jenkins workspace also, it doesn't include my change.

sorry if I am missing any information to mention. Please let me know please help me if I am missing anything here.

Answer 1

Using Jenkins 1.532.2 Git Client Plugin 1.6.2 Git Plugin 2.0.1 Git Trigger 2.11.0

Here are the steps for configuring the Gerrit Trigger (from memory, hopefully all works fine):

1. Install the plugin(s) "Gerrit Trigger", "Git Plugin" and "Git Client Plugin"
2. In the main jenkins config (HOME->Manage Jenkins), click on Gerrit Trigger.
3. Create the server and configure it. Use "Test Connection" to be sure it works.
4. At the end, under "Control" press "start" (No idea what that does or if it's actually needed, but I did that).
5. Go to your project's config (MYPROJECT->Configure)
6. Check "Gerrit event" under "Build Triggers"
7. In the newly added menu, select your server, your triggers, etc.
8. For Gerrit Project I used "Plain" with "MYPROJECT" as pattern
9. For Branch, I used "Path" and "**" as pattern (builds all branches)
10. Under "Source Code Management" (up from triggers in my UI), click on "Git"
11. Set the Repository URL, here $USER matches for me, but otherwise write the correct user $GERRIT_SCHEME://$USER@$GERRIT_HOST:$GERRIT_PORT/$GERRIT_PROJECT
12. Specify a branch: $GERRIT_BRANCH
13. Under "Repositories" on the right, click Advanced, for "Refspec" enter $GERRIT_REFSPEC
14. Click Add right below, and select "Strategy for choosing what to build"
15. Select "Gerrit Trigger"

Not very intuitive but it should work. I suggest making sure the correct SHA1 Ids are being built.

If run into Error stderr: fatal: Couldn't find remote ref $GERRIT_REFSPEC

Answer 2

You have to change the Choosing Strategy to Gerrit Trigger

Go to the configuration page of your job and then click on the 2nd Advanced button under the git section. Almost at the bottom there is a Choosing Strategy that you will need to change to Gerrit Trigger

This will cause Git to fetch the correct version for your build