[JENKINS-33933] Gerrit-trigger: null-pointer exception in GerritTriggerBuildChooser

In my test install I can not trigger jobs anymore:

I always get a null-pointer exception in BuildChooser (see log below).

Manually triggered by user pedersen for Gerrit: https:///review/3200

[lockable-resources] acquired lock on [Test1]

[EnvInject] - Loading node environment variables.

Baue auf Master in Arbeitsbereich /usr/local/jenkins/jobs/ResiSingleCounterMulti/workspace

 > /usr/local/bin/git rev-parse --is-inside-work-tree # timeout=10

Fetching changes from the remote Git repository

 > /usr/local/bin/git config remote.origin.url ssh://:29418/ # timeout=10

Fetching upstream changes from ssh://:29418/

 > /usr/local/bin/git --version # timeout=10

using GIT_SSH to set credentials 

 > /usr/local/bin/git fetch --tags --progress ssh://:29418/ refs/changes/00/3200/2

 > /usr/local/bin/git rev-parse efa17ba464d2392714029effc904c9fb8612e255^{commit} # timeout=10

Checking out Revision efa17ba464d2392714029effc904c9fb8612e255 (master)

 > /usr/local/bin/git config core.sparsecheckout # timeout=10

 > /usr/local/bin/git checkout -f efa17ba464d2392714029effc904c9fb8612e255

 > /usr/local/bin/git rev-parse FETCH_HEAD^{commit} # timeout=10

 > /usr/local/bin/git rev-list b8aa077a767bace642bbe5cbd88cae7eef3cab14 # timeout=10

Polling SCM changes on master

Using strategy: Gerrit Trigger

[poll] Last Built Revision: Revision efa17ba464d2392714029effc904c9fb8612e255 (refs/changes/00/3200/2)

 > /usr/local/bin/git rev-parse --is-inside-work-tree # timeout=10

Fetching changes from the remote Git repositories

 > /usr/local/bin/git config remote.origin.url ssh://:29418/.git # timeout=10

Fetching upstream changes from ssh://:29418/.git

 > /usr/local/bin/git --version # timeout=10

using GIT_ASKPASS to set credentials 

 > /usr/local/bin/git fetch --tags --progress ssh://:29418/.git refs/changes/00/3200/2 --depth=1

Polling for changes in

ERROR: Build step failed with exception

java.lang.NullPointerException

	at com.sonyericsson.hudson.plugins.gerrit.trigger.hudsontrigger.GerritTriggerBuildChooser$GetGerritEventRevision.invoke(GerritTriggerBuildChooser.java:217)

	at com.sonyericsson.hudson.plugins.gerrit.trigger.hudsontrigger.GerritTriggerBuildChooser$GetGerritEventRevision.invoke(GerritTriggerBuildChooser.java:212)

	at hudson.plugins.git.GitSCM$BuildChooserContextImpl.actOnBuild(GitSCM.java:864)

	at com.sonyericsson.hudson.plugins.gerrit.trigger.hudsontrigger.GerritTriggerBuildChooser.getCandidateRevisions(GerritTriggerBuildChooser.java:107)

	at hudson.plugins.git.GitSCM.compareRemoteRevisionWithImpl(GitSCM.java:663)

	at hudson.plugins.git.GitSCM.compareRemoteRevisionWith(GitSCM.java:528)

	at hudson.scm.SCM.compareRemoteRevisionWith(SCM.java:381)

	at hudson.scm.SCM.poll(SCM.java:398)

	at hudson.model.AbstractProject.pollWithWorkspace(AbstractProject.java:1468)

	at hudson.model.AbstractProject._poll(AbstractProject.java:1438)

	at hudson.model.AbstractProject.poll(AbstractProject.java:1349)

	at com.tikal.jenkins.plugins.multijob.MultiJobBuilder.getScmChange(MultiJobBuilder.java:173)

	at com.tikal.jenkins.plugins.multijob.MultiJobBuilder.perform(MultiJobBuilder.java:243)

	at hudson.tasks.BuildStepMonitor$1.perform(BuildStepMonitor.java:20)

	at hudson.model.AbstractBuild$AbstractBuildExecution.perform(AbstractBuild.java:782)

	at hudson.model.Build$BuildExecution.build(Build.java:205)

	at hudson.model.Build$BuildExecution.doRun(Build.java:162)

	at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:534)

	at com.tikal.jenkins.plugins.multijob.MultiJobBuild$MultiJobRunnerImpl.run(MultiJobBuild.java:136)

	at hudson.model.Run.execute(Run.java:1738)

	at com.tikal.jenkins.plugins.multijob.MultiJobBuild.run(MultiJobBuild.java:73)

	at hudson.model.ResourceController.execute(ResourceController.java:98)

	at hudson.model.Executor.run(Executor.java:410)

Build step 'MultiJob Phase' marked build as failure

[BFA] Scanning build for known causes...

[BFA] No failure causes found

[BFA] Done. 0s

---
Originally reported by pedersen, imported from: Gerrit-trigger: null-pointer exception in GerritTriggerBuildChooser

• assignee: rsandell
  
• status: Reopened
  
• priority: Critical
  
• component(s): gerrit-trigger-plugin
  
• resolution: Unresolved
  
• votes: 0
  
• watchers: 1
  
• imported: 2025-12-06
  

Raw content of original issue

In my test install I can not trigger jobs anymore: 

I always get a null-pointer exception in BuildChooser (see log below). 




Manually triggered by user pedersen for Gerrit: https://<hostname>/review/3200

[lockable-resources] acquired lock on [Test1]

[EnvInject] - Loading node environment variables.

Baue auf Master in Arbeitsbereich /usr/local/jenkins/jobs/ResiSingleCounterMulti/workspace

 > /usr/local/bin/git rev-parse --is-inside-work-tree # timeout=10

Fetching changes from the remote Git repository

 > /usr/local/bin/git config remote.origin.url ssh://<hostname>:29418/<project> # timeout=10

Fetching upstream changes from ssh://<hostname>:29418/<project>

 > /usr/local/bin/git --version # timeout=10

using GIT_SSH to set credentials 

 > /usr/local/bin/git fetch --tags --progress ssh://<hostname>:29418/<project> refs/changes/00/3200/2

 > /usr/local/bin/git rev-parse efa17ba464d2392714029effc904c9fb8612e255^{commit} # timeout=10

Checking out Revision efa17ba464d2392714029effc904c9fb8612e255 (master)

 > /usr/local/bin/git config core.sparsecheckout # timeout=10

 > /usr/local/bin/git checkout -f efa17ba464d2392714029effc904c9fb8612e255

 > /usr/local/bin/git rev-parse FETCH_HEAD^{commit} # timeout=10

 > /usr/local/bin/git rev-list b8aa077a767bace642bbe5cbd88cae7eef3cab14 # timeout=10

Polling SCM changes on master

Using strategy: Gerrit Trigger

[poll] Last Built Revision: Revision efa17ba464d2392714029effc904c9fb8612e255 (refs/changes/00/3200/2)

 > /usr/local/bin/git rev-parse --is-inside-work-tree # timeout=10

Fetching changes from the remote Git repositories

 > /usr/local/bin/git config remote.origin.url ssh://<hostname>:29418/<project>.git # timeout=10

Fetching upstream changes from ssh://<hostname>:29418/<project>.git

 > /usr/local/bin/git --version # timeout=10

using GIT_ASKPASS to set credentials 

 > /usr/local/bin/git fetch --tags --progress ssh://<hostname>:29418/<project>.git refs/changes/00/3200/2 --depth=1

Polling for changes in

ERROR: Build step failed with exception

java.lang.NullPointerException

	at com.sonyericsson.hudson.plugins.gerrit.trigger.hudsontrigger.GerritTriggerBuildChooser$GetGerritEventRevision.invoke(GerritTriggerBuildChooser.java:217)

	at com.sonyericsson.hudson.plugins.gerrit.trigger.hudsontrigger.GerritTriggerBuildChooser$GetGerritEventRevision.invoke(GerritTriggerBuildChooser.java:212)

	at hudson.plugins.git.GitSCM$BuildChooserContextImpl.actOnBuild(GitSCM.java:864)

	at com.sonyericsson.hudson.plugins.gerrit.trigger.hudsontrigger.GerritTriggerBuildChooser.getCandidateRevisions(GerritTriggerBuildChooser.java:107)

	at hudson.plugins.git.GitSCM.compareRemoteRevisionWithImpl(GitSCM.java:663)

	at hudson.plugins.git.GitSCM.compareRemoteRevisionWith(GitSCM.java:528)

	at hudson.scm.SCM.compareRemoteRevisionWith(SCM.java:381)

	at hudson.scm.SCM.poll(SCM.java:398)

	at hudson.model.AbstractProject.pollWithWorkspace(AbstractProject.java:1468)

	at hudson.model.AbstractProject._poll(AbstractProject.java:1438)

	at hudson.model.AbstractProject.poll(AbstractProject.java:1349)

	at com.tikal.jenkins.plugins.multijob.MultiJobBuilder.getScmChange(MultiJobBuilder.java:173)

	at com.tikal.jenkins.plugins.multijob.MultiJobBuilder.perform(MultiJobBuilder.java:243)

	at hudson.tasks.BuildStepMonitor$1.perform(BuildStepMonitor.java:20)

	at hudson.model.AbstractBuild$AbstractBuildExecution.perform(AbstractBuild.java:782)

	at hudson.model.Build$BuildExecution.build(Build.java:205)

	at hudson.model.Build$BuildExecution.doRun(Build.java:162)

	at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:534)

	at com.tikal.jenkins.plugins.multijob.MultiJobBuild$MultiJobRunnerImpl.run(MultiJobBuild.java:136)

	at hudson.model.Run.execute(Run.java:1738)

	at com.tikal.jenkins.plugins.multijob.MultiJobBuild.run(MultiJobBuild.java:73)

	at hudson.model.ResourceController.execute(ResourceController.java:98)

	at hudson.model.Executor.run(Executor.java:410)

Build step 'MultiJob Phase' marked build as failure

[BFA] Scanning build for known causes...

[BFA] No failure causes found

[BFA] Done. 0s

environment

```
jenkins 1.655/ jenkins 2.0-alpha/beta

gerrit-trigger-plugin 2.18.3+, also with f1a6a39 applied
```

Start in GerritTriggerBuildChooser.java at GetGerritEventRevision.invoke, especially lines 212 and 217 named by the stack trace. Reproduce polling with the reported Jenkins and gerrit-trigger-plugin versions, then verify that the Gerrit-triggered job no longer fails with a NullPointerException.

Written by the indexing model from the issue text.