Erro de build no Jenkins

Started by user Jenkins Alura
Running as SYSTEM
Building in workspace /var/lib/jenkins/workspace/jenkins-alura
[WS-CLEANUP] Deleting project workspace...
[WS-CLEANUP] Deferred wipeout is used...
[WS-CLEANUP] Done
using credential gitblit-ssh
Cloning the remote Git repository
Cloning repository git@github.com:alura-cursos/jenkins-todo-list.git
 > git init /var/lib/jenkins/workspace/jenkins-alura # timeout=10
Fetching upstream changes from git@github.com:alura-cursos/jenkins-todo-list.git
 > git --version # timeout=10
using GIT_SSH to set credentials gitblit-ssh
 > git fetch --tags --progress -- git@github.com:alura-cursos/jenkins-todo-list.git +refs/heads/*:refs/remotes/origin/*
 > git config remote.origin.url git@github.com:alura-cursos/jenkins-todo-list.git # timeout=10
 > git config --add remote.origin.fetch +refs/heads/*:refs/remotes/origin/* # timeout=10
 > git config remote.origin.url git@github.com:alura-cursos/jenkins-todo-list.git # timeout=10
Fetching upstream changes from git@github.com:alura-cursos/jenkins-todo-list.git
using GIT_SSH to set credentials gitblit-ssh
 > git fetch --tags --progress -- git@github.com:alura-cursos/jenkins-todo-list.git +refs/heads/*:refs/remotes/origin/*
 > git rev-parse refs/remotes/origin/master^{commit} # timeout=10
 > git rev-parse refs/remotes/origin/origin/master^{commit} # timeout=10
Checking out Revision eb95beb83d3b90471a26c303f6c4c3f1a9bb9fd0 (refs/remotes/origin/master)
 > git config core.sparsecheckout # timeout=10
 > git checkout -f eb95beb83d3b90471a26c303f6c4c3f1a9bb9fd0
Commit message: "Teste de commit"
 > git rev-list --no-walk eb95beb83d3b90471a26c303f6c4c3f1a9bb9fd0 # timeout=10
[jenkins-alura] $  /bin/bash /tmp/jenkins6767542737837377558.sh
FATAL: command execution failed
java.io.IOException: error=2, No such file or directory
    at java.lang.UNIXProcess.forkAndExec(Native Method)
    at java.lang.UNIXProcess.<init>(UNIXProcess.java:247)
    at java.lang.ProcessImpl.start(ProcessImpl.java:134)
    at java.lang.ProcessBuilder.start(ProcessBuilder.java:1029)
Caused: java.io.IOException: Cannot run program "" (in directory "/var/lib/jenkins/workspace/jenkins-alura"): error=2, No such file or directory
    at java.lang.ProcessBuilder.start(ProcessBuilder.java:1048)
    at hudson.Proc$LocalProc.<init>(Proc.java:250)
    at hudson.Proc$LocalProc.<init>(Proc.java:219)
    at hudson.Launcher$LocalLauncher.launch(Launcher.java:937)
    at hudson.Launcher$ProcStarter.start(Launcher.java:455)
    at hudson.tasks.CommandInterpreter.perform(CommandInterpreter.java:109)
    at hudson.tasks.CommandInterpreter.perform(CommandInterpreter.java:66)
    at hudson.tasks.BuildStepMonitor$1.perform(BuildStepMonitor.java:20)
    at hudson.model.AbstractBuild$AbstractBuildExecution.perform(AbstractBuild.java:741)
    at hudson.model.Build$BuildExecution.build(Build.java:206)
    at hudson.model.Build$BuildExecution.doRun(Build.java:163)
    at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:504)
    at hudson.model.Run.execute(Run.java:1815)
    at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:43)
    at hudson.model.ResourceController.execute(ResourceController.java:97)
    at hudson.model.Executor.run(Executor.java:429)
Build step 'Execute shell' marked build as failure
Finished: FAILURE

Ao executar o build com git e a execução do shell dite pelo professor, aparece este erro. O que seria?