![[Jenkins]](/jenkins/static/4c02f576/images/svgs/logo.svg){kind=logo}
Manage Old Data
When there are changes in how data is stored on disk, Jenkins uses the following strategy: data is migrated to the new structure when it is loaded, but items/records are not resaved in the new format. This allows for downgrading Jenkins if necessary. However, it can also leave data on disk in the old format indefinitely. The table below lists items/records containing such data, and the Jenkins version(s) where the data structure was changed.
Sometimes errors occur while reading data (if a plugin adds some data and that plugin is later disabled, if migration code is not written for structure changes, or if Jenkins is downgraded after it has already written data not readable by the older version). These errors are logged, but the unreadable data is then skipped over, allowing Jenkins to start up and function properly.
| Type | Name | Version | Error |
|---|
Unreadable Data
It is ok to leave unreadable data in these items/records, as Jenkins will simply ignore it. To avoid the log messages at Jenkins startup you can permanently delete the unreadable data by resaving these items/records using the button below the list.
| Type | Name | Error |
|---|---|---|
| hudson.model.User | onoffdev | CannotResolveClassException: com.cloudbees.plugins.credentials.UserCredentialsProvider$UserCredentialsProperty, CannotResolveClassException: hudson.plugins.emailext.watching.EmailExtWatchAction$UserProperty, CannotResolveClassException: hudson.tasks.Mailer$UserProperty |
| hudson.model.FreeStyleBuild | (DEV)_MarriageWell_NoBanking #457 | CannotResolveClassException: org.jenkinsci.plugins.envinject.EnvInjectPluginAction, CannotResolveClassException: com.cloudbees.plugins.credentials.builds.CredentialsParameterBinder, CannotResolveClassException: hudson.plugins.git.util.BuildData, CannotResolveClassException: com.sonyericsson.rebuild.RebuildAction, CannotResolveClassException: hudson.plugins.git.GitChangeLogParser |
| hudson.model.FreeStyleProject | (PRD)_MarriageWell_NoBanking_Stop | CannotResolveClassException: hudson.security.AuthorizationMatrixProperty, CannotResolveClassException: com.dabsquared.gitlabjenkins.connection.GitLabConnectionProperty, CannotResolveClassException: com.sonyericsson.rebuild.RebuildSettings, CannotResolveClassException: jenkins.plugins.publish_over_ssh.BapSshBuilderPlugin, CannotResolveClassException: hudson.plugins.timestamper.TimestamperBuildWrapper |
| hudson.model.FreeStyleProject | (PRD)_MarriageWell_Banking_Stop | CannotResolveClassException: com.dabsquared.gitlabjenkins.connection.GitLabConnectionProperty, CannotResolveClassException: com.sonyericsson.rebuild.RebuildSettings, CannotResolveClassException: jenkins.plugins.publish_over_ssh.BapSshBuilderPlugin, CannotResolveClassException: hudson.plugins.timestamper.TimestamperBuildWrapper |
| hudson.model.FreeStyleProject | (PRD)_MarriageWell_Banking | CannotResolveClassException: com.dabsquared.gitlabjenkins.connection.GitLabConnectionProperty, CannotResolveClassException: com.sonyericsson.rebuild.RebuildSettings, CannotResolveClassException: net.uaznia.lukanus.hudson.plugins.gitparameter.GitParameterDefinition, CannotResolveClassException: hudson.plugins.git.GitSCM, CannotResolveClassException: jenkins.plugins.publish_over_ssh.BapSshBuilderPlugin, CannotResolveClassException: hudson.plugins.timestamper.TimestamperBuildWrapper |
| hudson.model.User | 김지연 | CannotResolveClassException: com.cloudbees.plugins.credentials.UserCredentialsProvider$UserCredentialsProperty, CannotResolveClassException: hudson.tasks.Mailer$UserProperty, CannotResolveClassException: hudson.plugins.emailext.watching.EmailExtWatchAction$UserProperty, CannotResolveClassException: org.jenkinsci.main.modules.cli.auth.ssh.UserPropertyImpl |
| hudson.model.User | 이종석 | CannotResolveClassException: com.cloudbees.plugins.credentials.UserCredentialsProvider$UserCredentialsProperty, CannotResolveClassException: hudson.plugins.emailext.watching.EmailExtWatchAction$UserProperty, CannotResolveClassException: hudson.tasks.Mailer$UserProperty |
| hudson.model.FreeStyleProject | (PRD)_MarriageWell_Banking_Start | CannotResolveClassException: com.dabsquared.gitlabjenkins.connection.GitLabConnectionProperty, CannotResolveClassException: com.sonyericsson.rebuild.RebuildSettings, CannotResolveClassException: jenkins.plugins.publish_over_ssh.BapSshBuilderPlugin, CannotResolveClassException: hudson.plugins.timestamper.TimestamperBuildWrapper |
| hudson.model.FreeStyleBuild | (PRD)_MarriageWell_NoBanking #111 | CannotResolveClassException: net.uaznia.lukanus.hudson.plugins.gitparameter.GitParameterValue, CannotResolveClassException: org.jenkinsci.plugins.envinject.EnvInjectPluginAction, CannotResolveClassException: com.cloudbees.plugins.credentials.builds.CredentialsParameterBinder, CannotResolveClassException: hudson.plugins.git.util.BuildData, CannotResolveClassException: com.sonyericsson.rebuild.RebuildAction, CannotResolveClassException: hudson.plugins.git.GitChangeLogParser |
| hudson.model.FreeStyleBuild | (DEV)_MarriageWell_Banking #325 | CannotResolveClassException: org.jenkinsci.plugins.envinject.EnvInjectPluginAction, CannotResolveClassException: com.cloudbees.plugins.credentials.builds.CredentialsParameterBinder, CannotResolveClassException: hudson.plugins.git.util.BuildData, CannotResolveClassException: com.sonyericsson.rebuild.RebuildAction, CannotResolveClassException: hudson.plugins.git.GitChangeLogParser |
| hudson.model.User | jason.h | CannotResolveClassException: com.cloudbees.plugins.credentials.UserCredentialsProvider$UserCredentialsProperty, CannotResolveClassException: hudson.plugins.emailext.watching.EmailExtWatchAction$UserProperty, CannotResolveClassException: hudson.tasks.Mailer$UserProperty |
| hudson.model.FreeStyleProject | (PRD)_MarriageWell_NoBanking_Start | CannotResolveClassException: hudson.security.AuthorizationMatrixProperty, CannotResolveClassException: com.dabsquared.gitlabjenkins.connection.GitLabConnectionProperty, CannotResolveClassException: com.sonyericsson.rebuild.RebuildSettings, CannotResolveClassException: jenkins.plugins.publish_over_ssh.BapSshBuilderPlugin, CannotResolveClassException: hudson.plugins.timestamper.TimestamperBuildWrapper |
| hudson.slaves.DumbSlave | hsbcorp-dev-tools-node | CannotResolveClassException: hudson.plugins.sshslaves.SSHLauncher |
| hudson.model.FreeStyleProject | (DEV)_MarriageWell_Banking | CannotResolveClassException: com.dabsquared.gitlabjenkins.connection.GitLabConnectionProperty, CannotResolveClassException: com.sonyericsson.rebuild.RebuildSettings, CannotResolveClassException: hudson.plugins.git.GitSCM, CannotResolveClassException: com.dabsquared.gitlabjenkins.GitLabPushTrigger, CannotResolveClassException: jenkins.plugins.publish_over_ssh.BapSshBuilderPlugin, CannotResolveClassException: hudson.plugins.timestamper.TimestamperBuildWrapper |
| hudson.model.User | marry | CannotResolveClassException: com.cloudbees.plugins.credentials.UserCredentialsProvider$UserCredentialsProperty, CannotResolveClassException: hudson.plugins.emailext.watching.EmailExtWatchAction$UserProperty, CannotResolveClassException: hudson.tasks.Mailer$UserProperty |
| hudson.model.FreeStyleProject | (DEV)_MarriageWell_NoBanking | CannotResolveClassException: com.dabsquared.gitlabjenkins.connection.GitLabConnectionProperty, CannotResolveClassException: com.sonyericsson.rebuild.RebuildSettings, CannotResolveClassException: hudson.plugins.git.GitSCM, CannotResolveClassException: com.dabsquared.gitlabjenkins.GitLabPushTrigger, CannotResolveClassException: jenkins.plugins.publish_over_ssh.BapSshBuilderPlugin, CannotResolveClassException: hudson.plugins.timestamper.TimestamperBuildWrapper |
| hudson.model.User | 시스템관리자 | CannotResolveClassException: com.cloudbees.plugins.credentials.UserCredentialsProvider$UserCredentialsProperty, CannotResolveClassException: hudson.plugins.emailext.watching.EmailExtWatchAction$UserProperty, CannotResolveClassException: hudson.tasks.Mailer$UserProperty |
| hudson.model.FreeStyleBuild | (PRD)_MarriageWell_Banking #233 | CannotResolveClassException: net.uaznia.lukanus.hudson.plugins.gitparameter.GitParameterValue, CannotResolveClassException: org.jenkinsci.plugins.envinject.EnvInjectPluginAction, CannotResolveClassException: com.cloudbees.plugins.credentials.builds.CredentialsParameterBinder, CannotResolveClassException: hudson.plugins.git.util.BuildData, CannotResolveClassException: com.sonyericsson.rebuild.RebuildAction, CannotResolveClassException: hudson.plugins.git.GitChangeLogParser |