Provider message:
The cvs command failed.
Command output:
cvs commit: Up-to-date check failed for `pom.xml'
cvs [commit aborted]: correct above errors first!

<?xml version='1.0' encoding='UTF-8'?>
<maven2-moduleset plugin="maven-plugin@1.499">
  <actions/>
  <description>server branch build</description>
  <keepDependencies>false</keepDependencies>
  <properties>
    <de.pellepelster.jenkins.walldisplay.WallDisplayJobProperty plugin="jenkinswalldisplay@0.6.15"/>
  </properties>
  <scm class="hudson.scm.CVSSCM" plugin="cvs@2.8">
    <flatten>true</flatten>
    <repositoryBrowser class="hudson.scm.browsers.ViewCVS">
      <url>https://viewvc/cgi-bin/viewvc.cgi/server/?root=root</url>
    </repositoryBrowser>
    <repositories>
      <hudson.scm.CvsRepository>
        <cvsRoot>:pserver:builder@pserver:/cvsroot-root</cvsRoot>
        <repositoryItems>
          <hudson.scm.CvsRepositoryItem>
            <modules>
              <hudson.scm.CvsModule>
                <localName></localName>
                <remoteName>Component/services/server</remoteName>
              </hudson.scm.CvsModule>
            </modules>
            <location class="hudson.scm.CvsRepositoryLocation$BranchRepositoryLocation">
              <locationType>BRANCH</locationType>
              <locationName>RC_repServer2_6</locationName>
              <useHeadIfNotFound>false</useHeadIfNotFound>
            </location>
          </hudson.scm.CvsRepositoryItem>
        </repositoryItems>
        <compressionLevel>-1</compressionLevel>
        <excludedRegions>
          <hudson.scm.ExcludedRegion>
            <pattern></pattern>
          </hudson.scm.ExcludedRegion>
        </excludedRegions>
        <password>B5SEyM3MM3X7KWpcw=</password>
        <passwordRequired>true</passwordRequired>
      </hudson.scm.CvsRepository>
    </repositories>
    <canUseUpdate>false</canUseUpdate>
    <skipChangeLog>false</skipChangeLog>
    <pruneEmptyDirectories>true</pruneEmptyDirectories>
    <disableCvsQuiet>true</disableCvsQuiet>
    <cleanOnFailedUpdate>false</cleanOnFailedUpdate>
    <forceCleanCopy>true</forceCleanCopy>
  </scm>
  <assignedNode>dev02</assignedNode>
  <canRoam>false</canRoam>
  <disabled>false</disabled>
  <blockBuildWhenDownstreamBuilding>false</blockBuildWhenDownstreamBuilding>
  <blockBuildWhenUpstreamBuilding>false</blockBuildWhenUpstreamBuilding>
  <jdk>sun_jdk_7</jdk>
  <triggers class="vector">
    <hudson.triggers.SCMTrigger>
      <spec># every 10 mins
*/10 * * * *</spec>
      <ignorePostCommitHooks>false</ignorePostCommitHooks>
    </hudson.triggers.SCMTrigger>
  </triggers>
  <concurrentBuild>false</concurrentBuild>
  <rootModule>
    <groupId>com.components.server</groupId>
    <artifactId>server</artifactId>
  </rootModule>
  <goals>-U -DskipITs=false clean install -e</goals>
  <mavenOpts>-Xmx512M -Dm3plugin.lib=/space/jenkins_slave/main/workspace/artifactory-plugin/2.1.3</mavenOpts>
  <aggregatorStyleBuild>true</aggregatorStyleBuild>
  <incrementalBuild>false</incrementalBuild>
  <perModuleEmail>true</perModuleEmail>
  <ignoreUpstremChanges>false</ignoreUpstremChanges>
  <archivingDisabled>false</archivingDisabled>
  <resolveDependencies>false</resolveDependencies>
  <processPlugins>false</processPlugins>
  <mavenValidationLevel>-1</mavenValidationLevel>
  <runHeadless>false</runHeadless>
  <disableTriggerDownstreamProjects>false</disableTriggerDownstreamProjects>
  <settings class="jenkins.mvn.DefaultSettingsProvider"/>
  <globalSettings class="jenkins.mvn.DefaultGlobalSettingsProvider"/>
  <reporters>
    <hudson.maven.reporters.MavenMailer>
      <recipients>dev@mail.com</recipients>
      <dontNotifyEveryUnstableBuild>false</dontNotifyEveryUnstableBuild>
      <sendToIndividuals>true</sendToIndividuals>
      <perModuleEmail>true</perModuleEmail>
    </hudson.maven.reporters.MavenMailer>
  </reporters>
  <publishers/>
  <buildWrappers>
    <org.jvnet.hudson.plugins.m2release.M2ReleaseBuildWrapper plugin="m2release@0.9.1">
      <scmUserEnvVar></scmUserEnvVar>
      <scmPasswordEnvVar></scmPasswordEnvVar>
      <releaseEnvVar>IS_M2RELEASEBUILD</releaseEnvVar>
      <releaseGoals>-Dresume=false release:prepare release:perform -Dmaven.scm.provider.cvs.implementation=cvs_native -X</releaseGoals>
      <dryRunGoals>-X -Dresume=false -DdryRun=true release:prepare -Dmaven.scm.provider.cvs.implementation=cvs_native -e</dryRunGoals>
      <selectCustomScmCommentPrefix>false</selectCustomScmCommentPrefix>
      <selectAppendHudsonUsername>false</selectAppendHudsonUsername>
      <selectScmCredentials>false</selectScmCredentials>
    </org.jvnet.hudson.plugins.m2release.M2ReleaseBuildWrapper>
    <org.jfrog.hudson.maven3.ArtifactoryMaven3NativeConfigurator plugin="artifactory@2.1.3">
      <details>
        <artifactoryUrl>http://artifactory/artifactory</artifactoryUrl>
        <artifactoryName>http://artifactory/artifactory</artifactoryName>
        <downloadRepositoryKey>repository</downloadRepositoryKey>
      </details>
    </org.jfrog.hudson.maven3.ArtifactoryMaven3NativeConfigurator>
  </buildWrappers>
  <prebuilders>
    <hudson.tasks.Shell>
      <command></command>
    </hudson.tasks.Shell>
  </prebuilders>
  <postbuilders/>
  <runPostStepsIfResult>
    <name>SUCCESS</name>
    <ordinal>0</ordinal>
    <color>BLUE</color>
  </runPostStepsIfResult>
</maven2-moduleset>

private void cleanup(File directory, AdminHandler adminHandler) throws IOException {
                            for (File file : adminHandler.getAllFiles(directory)) {
                                Entry entry = adminHandler.getEntry(file);
                                String savedTag = entry.getTag();
                                entry.setDate(null); 
                                
                                adminHandler.setEntry(file, entry);
                            }

I hope that helps your analysis. 
As a quick fix I've changed my AbstractCVS code as below but I'm not fully sure of the consequences.

to