【发布时间】：2014-04-25 14:24:15
【问题描述】：
一些背景知识 - 我们最近将一些项目从 SVN 迁移到 HG，但不是全部。完成此操作后，我们安装了 Mercurial Jenkins 插件并更新了上述构建以利用它而不是 SVN。
什么可能导致以下问题？请注意，这似乎只发生在一个选定的作业中，但作业配置文件中的任何内容都不会让我相信存在对 SVN 的任何引用。
Apr 25, 2014 9:14:18 AM hudson.triggers.SCMTrigger$Runner runPolling
SEVERE: Failed to record SCM polling for hudson.maven.MavenModuleSet@375dff59[my-project]
java.lang.ClassCastException: hudson.scm.SVNRevisionState cannot be cast to hudson.plugins.mercurial.MercurialTagAction
at hudson.plugins.mercurial.MercurialSCM.compareRemoteRevisionWith(MercurialSCM.java:301)
at hudson.scm.SCM._compareRemoteRevisionWith(SCM.java:356)
at hudson.scm.SCM.poll(SCM.java:373)
at hudson.model.AbstractProject.pollWithWorkspace(AbstractProject.java:1605)
at hudson.model.AbstractProject._poll(AbstractProject.java:1575)
at hudson.model.AbstractProject.poll(AbstractProject.java:1493)
at hudson.triggers.SCMTrigger$Runner.runPolling(SCMTrigger.java:462)
at hudson.triggers.SCMTrigger$Runner.run(SCMTrigger.java:491)
at hudson.util.SequentialExecutionQueue$QueueEntry.run(SequentialExecutionQueue.java:118)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
at java.util.concurrent.FutureTask.run(FutureTask.java:138)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:662)
配置文件：
<?xml version='1.0' encoding='UTF-8'?>
<maven2-moduleset plugin="maven-plugin@2.1">
<actions/>
<description></description>
<logRotator class="hudson.tasks.LogRotator">
<daysToKeep>10</daysToKeep>
<numToKeep>10</numToKeep>
<artifactDaysToKeep>-1</artifactDaysToKeep>
<artifactNumToKeep>-1</artifactNumToKeep>
</logRotator>
<keepDependencies>false</keepDependencies>
<properties/>
<scm class="hudson.plugins.mercurial.MercurialSCM" plugin="mercurial@1.50">
<source>http://foo/my-repo</source>
<modules></modules>
<revisionType>BRANCH</revisionType>
<revision>default</revision>
<clean>false</clean>
<browser class="hudson.plugins.mercurial.browser.RhodeCode">
<url>http://foo</url>
</browser>
<credentialsId>bar</credentialsId>
<disableChangeLog>false</disableChangeLog>
</scm>
<canRoam>true</canRoam>
<disabled>false</disabled>
<blockBuildWhenDownstreamBuilding>false</blockBuildWhenDownstreamBuilding>
<blockBuildWhenUpstreamBuilding>false</blockBuildWhenUpstreamBuilding>
<jdk>(Default)</jdk>
<triggers>
<hudson.triggers.SCMTrigger>
<spec># every 5 minutes (perhaps at :07, :22, :37, :52)
H/05 * * * *</spec>
<ignorePostCommitHooks>false</ignorePostCommitHooks>
</hudson.triggers.SCMTrigger>
</triggers>
<concurrentBuild>false</concurrentBuild>
<rootModule>
<groupId>com.foo</groupId>
<artifactId>my-project</artifactId>
</rootModule>
<goals>clean</goals>
<aggregatorStyleBuild>true</aggregatorStyleBuild>
<incrementalBuild>false</incrementalBuild>
<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></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@0.13.0">
<scmUserEnvVar></scmUserEnvVar>
<scmPasswordEnvVar></scmPasswordEnvVar>
<releaseEnvVar>IS_M2RELEASEBUILD</releaseEnvVar>
<releaseGoals>clean -Dresume=false release:prepare release:perform</releaseGoals>
<dryRunGoals>clean -Dresume=false -DdryRun=true release:prepare</dryRunGoals>
<selectCustomScmCommentPrefix>false</selectCustomScmCommentPrefix>
<selectAppendHudsonUsername>false</selectAppendHudsonUsername>
<selectScmCredentials>false</selectScmCredentials>
<numberOfReleaseBuildsToKeep>1</numberOfReleaseBuildsToKeep>
</org.jvnet.hudson.plugins.m2release.M2ReleaseBuildWrapper>
</buildWrappers>
<prebuilders/>
<postbuilders/>
<runPostStepsIfResult>
<name>FAILURE</name>
<ordinal>2</ordinal>
<color>RED</color>
<completeBuild>true</completeBuild>
</runPostStepsIfResult>
</maven2-moduleset>
【问题讨论】：
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你有没有解决这个问题？