Since upgrading from plugin version 1.14.0 to 1.15.0 we have had two breakages:

First because we didn't have "Manifest File" set in the Gerrit Repo SCM (which wasn't a problem before) but now we get this failure:

java.lang.IllegalArgumentException: Null value not allowed as an environment variable: REPO_MANIFEST_FILE
at hudson.EnvVars.put(EnvVars.java:380)
at hudson.EnvVars.put(EnvVars.java:75)
at hudson.plugins.repo.RepoScm.buildEnvironment(RepoScm.java:1193)
at hudson.scm.SCM.buildEnvVars(SCM.java:589)
at hudson.model.AbstractBuild.getEnvironment(AbstractBuild.java:962)
at hudson.tasks.CommandInterpreter.perform(CommandInterpreter.java:128)
at hudson.tasks.CommandInterpreter.perform(CommandInterpreter.java:92)
at hudson.tasks.BuildStepMonitor$1.perform(BuildStepMonitor.java:20)
at hudson.model.AbstractBuild$AbstractBuildExecution.perform(AbstractBuild.java:814)
at hudson.model.Build$BuildExecution.build(Build.java:199)
at hudson.model.Build$BuildExecution.doRun(Build.java:164)
at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:522)
at hudson.model.Run.execute(Run.java:1896)
at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:44)
at hudson.model.ResourceController.execute(ResourceController.java:101)
at hudson.model.Executor.run(Executor.java:442)

Once we had this fixed / worked around we are getting this failure:

[myjob] $ /bin/bash /tmp/jenkins/jenkins16772383734652891311.sh
FATAL: command execution failed
java.io.IOException: error=7, Argument list too long
at java.base/java.lang.ProcessImpl.forkAndExec(Native Method)
at java.base/java.lang.ProcessImpl.<init>(ProcessImpl.java:340)
at java.base/java.lang.ProcessImpl.start(ProcessImpl.java:271)
at java.base/java.lang.ProcessBuilder.start(ProcessBuilder.java:1107)
Also: hudson.remoting.Channel$CallSiteStackTrace: Remote call to agent-02
at hudson.remoting.Channel.attachCallSiteStackTrace(Channel.java:1784)
at hudson.remoting.UserRequest$ExceptionResponse.retrieve(UserRequest.java:356)
at hudson.remoting.Channel.call(Channel.java:1000)
at hudson.Launcher$RemoteLauncher.launch(Launcher.java:1124)
at hudson.Launcher$ProcStarter.start(Launcher.java:509)
at hudson.tasks.CommandInterpreter.perform(CommandInterpreter.java:144)
at hudson.tasks.CommandInterpreter.perform(CommandInterpreter.java:92)
at hudson.tasks.BuildStepMonitor$1.perform(BuildStepMonitor.java:20)
at hudson.model.AbstractBuild$AbstractBuildExecution.perform(AbstractBuild.java:814)
at hudson.model.Build$BuildExecution.build(Build.java:199)
at hudson.model.Build$BuildExecution.doRun(Build.java:164)
at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:522)
at hudson.model.Run.execute(Run.java:1896)
at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:44)
at hudson.model.ResourceController.execute(ResourceController.java:101)
at hudson.model.Executor.run(Executor.java:442)
Caused: java.io.IOException: Cannot run program "/bin/bash" (in directory "/home/jenkins/workspace/myjob"): error=7, Argument list too long
at java.base/java.lang.ProcessBuilder.start(ProcessBuilder.java:1128)
at java.base/java.lang.ProcessBuilder.start(ProcessBuilder.java:1071)
at hudson.Proc$LocalProc.<init>(Proc.java:254)
at hudson.Proc$LocalProc.<init>(Proc.java:223)
at hudson.Launcher$LocalLauncher.launch(Launcher.java:997)
at hudson.Launcher$ProcStarter.start(Launcher.java:509)
at hudson.Launcher$RemoteLaunchCallable.call(Launcher.java:1398)
at hudson.Launcher$RemoteLaunchCallable.call(Launcher.java:1340)
at hudson.remoting.UserRequest.perform(UserRequest.java:211)
at hudson.remoting.UserRequest.perform(UserRequest.java:54)
at hudson.remoting.Request$2.run(Request.java:376)
at hudson.remoting.InterceptingExecutorService.lambda$wrap$0(InterceptingExecutorService.java:78)
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
at java.base/java.lang.Thread.run(Thread.java:829)
Build step 'Execute shell' marked build as failure

We have a ~250 line shell script in "Execute shell" and 7 build parameters with values either being empty or max. 25 characters long. Other than that I don't think the job has any noteworthy configuration.

After downgrading the repo plugin back to 1.14.0 it works fine again.