I am getting below error while deploying the build

Jenkins setup:

java.io.IOException: error=0, Failed to exec spawn helper: pid: 3047397, exit value: 1
at java.base/java.lang.ProcessImpl.forkAndExec(Native Method)
at java.base/java.lang.ProcessImpl.(ProcessImpl.java:314)
at java.base/java.lang.ProcessImpl.start(ProcessImpl.java:244)
at java.base/java.lang.ProcessBuilder.start(ProcessBuilder.java:1110)
Caused: java.io.IOException: Cannot run program “git” (in directory “/var/lib/jenkins/caches/git-ebf396ceb757b5778f143f8069e97e3a”): error=0, Failed to exec spawn helper: pid: 3047397, exit value: 1
at java.base/java.lang.ProcessBuilder.start(ProcessBuilder.java:1143)
at java.base/java.lang.ProcessBuilder.start(ProcessBuilder.java:1073)
at hudson.Proc$LocalProc.(Proc.java:252)
at hudson.Proc$LocalProc.(Proc.java:221)
at hudson.Launcher$LocalLauncher.launch(Launcher.java:994)
at hudson.Launcher$ProcStarter.start(Launcher.java:506)
at PluginClassLoader for git-client//org.jenkinsci.plugins.gitclient.CliGitAPIImpl.launchCommandIn(CliGitAPIImpl.java:2834)
Caused: hudson.plugins.git.GitException: Error performing git command: git init /var/lib/jenkins/caches/git-ebf396ceb757b5778f143f8069e97e3a
at PluginClassLoader for git-client//org.jenkinsci.plugins.gitclient.CliGitAPIImpl.launchCommandIn(CliGitAPIImpl.java:2857)
at PluginClassLoader for git-client//org.jenkinsci.plugins.gitclient.CliGitAPIImpl.launchCommandIn(CliGitAPIImpl.java:2761)
at PluginClassLoader for git-client//org.jenkinsci.plugins.gitclient.CliGitAPIImpl.launchCommandIn(CliGitAPIImpl.java:2756)
at PluginClassLoader for git-client//org.jenkinsci.plugins.gitclient.CliGitAPIImpl.launchCommand(CliGitAPIImpl.java:2045)
at PluginClassLoader for git-client//org.jenkinsci.plugins.gitclient.CliGitAPIImpl$5.execute(CliGitAPIImpl.java:1070)
Caused: hudson.plugins.git.GitException: Could not init /var/lib/jenkins/caches/git-ebf396ceb757b5778f143f8069e97e3a
at PluginClassLoader for git-client//org.jenkinsci.plugins.gitclient.CliGitAPIImpl$5.execute(CliGitAPIImpl.java:1072)
at PluginClassLoader for git-client//org.jenkinsci.plugins.gitclient.CliGitAPIImpl.init(CliGitAPIImpl.java:359)
at PluginClassLoader for git-client//hudson.plugins.git.GitAPI.init(GitAPI.java:244)
at PluginClassLoader for git//jenkins.plugins.git.GitSCMFileSystem$BuilderImpl.build(GitSCMFileSystem.java:390)
Caused: java.io.IOException
at PluginClassLoader for git//jenkins.plugins.git.GitSCMFileSystem$BuilderImpl.build(GitSCMFileSystem.java:413)
at PluginClassLoader for scm-api//jenkins.scm.api.SCMFileSystem.of(SCMFileSystem.java:219)
at PluginClassLoader for workflow-cps//org.jenkinsci.plugins.workflow.cps.CpsScmFlowDefinition.create(CpsScmFlowDefinition.java:126)
at PluginClassLoader for workflow-cps//org.jenkinsci.plugins.workflow.cps.CpsScmFlowDefinition.create(CpsScmFlowDefinition.java:73)
at PluginClassLoader for workflow-job//org.jenkinsci.plugins.workflow.job.WorkflowRun.run(WorkflowRun.java:311)
at hudson.model.ResourceController.execute(ResourceController.java:101)
at hudson.model.Executor.run(Executor.java:445)
Finished: FAILURE

i am new to devops need your expertise answers so that the problem will be solved

restarted jenkins its working fine

What probably happened is that the underlying Java was upgraded while Jenkins was running. So restarting fixed it.