Error with changeSet in jenkins pipeline (Error:java.io.NotSerializableException: hudson.plugins.git.GitChangeSetList)

Jenkins jobs can be saved in mid execution, which requires them to be serialized. The contents of rawBuild cannot be serialized, so if you access this, you need to do so within a function that is prefaced with @NonCPS. E.g.:

showChangeLogs()@NonCPSdef showChangeLogs() {  def changeLogSets = currentBuild.rawBuild.changeSets  for (int i = 0; i < changeLogSets.size(); i++) {     def entries = changeLogSets[i].items     for (int j = 0; j < entries.length; j++) {          def entry = entries[j]          echo "${entry.commitId} by ${entry.author} on ${new Date(entry.timestamp)}: ${entry.msg}"          def files = new ArrayList(entry.affectedFiles)          for (int k = 0; k < files.size(); k++) {              def file = files[k]              echo "  ${file.editType.name} ${file.path}"          }      }  }}

Not exactly the same code, but the same problem can be caused if you don't declare local variables before their use.https://blog.csdn.net/liurizhou/article/details/88236397

So, additionally to adding "@NonCPS", you need to add 'def' before all local variables

I want to provide another answer, piggybacking BMitch's answer. rawBuild method poses security issue and is blocked in Jenkinsfile. In newer versions currentBuild object exposes changeSets directly, so you can use the script like this

@NonCPSdef showChangeLogs() {    def changeLogSets = currentBuild.changeSets    for (int i = 0; i < changeLogSets.size(); i++) {        def entries = changeLogSets[i].items        for (int j = 0; j < entries.length; j++) {            def entry = entries[j]            echo "${entry.commitId} by ${entry.author} on ${new Date(entry.timestamp)}: ${entry.msg}"            def files = new ArrayList(entry.affectedFiles)            for (int k = 0; k < files.size(); k++) {                def file = files[k]                echo "${file.editType.name} ${file.path}"            }        }    }}