... WARNING hudson.model.RunMap retrieve
could not load .../jobs/.../builds/2013-11-19_...
hudson.util.IOException2: Unable to read .../jobs/.../builds/2013-11-19_.../build.xml
	at hudson.XmlFile.unmarshal(XmlFile.java:166)
	at hudson.model.Run.reload(Run.java:320)
	at hudson.model.Run.<init>(Run.java:309)
	at hudson.model.AbstractBuild.<init>(AbstractBuild.java:187)
	at hudson.model.Build.<init>(Build.java:103)
	at hudson.model.FreeStyleBuild.<init>(FreeStyleBuild.java:41)
	at ...
Caused by: com.thoughtworks.xstream.converters.ConversionException: Invalid reference
---- Debugging information ----
reference           : ../hudson.plugins.disk__usage.BuildDiskUsageAction/build/actions/org.jvnet.hudson.plugins.DownstreamBuildViewAction
class               : java.util.concurrent.CopyOnWriteArrayList
required-type       : java.util.concurrent.CopyOnWriteArrayList
converter-type      : hudson.util.RobustCollectionConverter
path                : /build/actions/org.jvnet.hudson.plugins.DownstreamBuildViewAction
line number         : 143
class[1]            : hudson.model.FreeStyleBuild
converter-type[1]   : hudson.util.RobustReflectionConverter
version             : not available
-------------------------------
	at com.thoughtworks.xstream.core.AbstractReferenceUnmarshaller.convert(AbstractReferenceUnmarshaller.java:57)
	at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:66)
	at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:50)
	at com.thoughtworks.xstream.converters.collections.AbstractCollectionConverter.readItem(AbstractCollectionConverter.java:71)
	at hudson.util.RobustCollectionConverter.populateCollection(RobustCollectionConverter.java:85)
	at com.thoughtworks.xstream.converters.collections.CollectionConverter.unmarshal(CollectionConverter.java:61)
	at hudson.util.RobustCollectionConverter.unmarshal(RobustCollectionConverter.java:76)
	at com.thoughtworks.xstream.core.TreeUnmarshaller.convert(TreeUnmarshaller.java:72)
	at com.thoughtworks.xstream.core.AbstractReferenceUnmarshaller.convert(AbstractReferenceUnmarshaller.java:65)
	at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:66)
	at hudson.util.RobustReflectionConverter.unmarshalField(RobustReflectionConverter.java:357)
	at hudson.util.RobustReflectionConverter.doUnmarshal(RobustReflectionConverter.java:290)
	at hudson.util.RobustReflectionConverter.unmarshal(RobustReflectionConverter.java:229)
	at com.thoughtworks.xstream.core.TreeUnmarshaller.convert(TreeUnmarshaller.java:72)
	at com.thoughtworks.xstream.core.AbstractReferenceUnmarshaller.convert(AbstractReferenceUnmarshaller.java:65)
	at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:66)
	at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:50)
	at com.thoughtworks.xstream.core.TreeUnmarshaller.start(TreeUnmarshaller.java:134)
	at com.thoughtworks.xstream.core.AbstractTreeMarshallingStrategy.unmarshal(AbstractTreeMarshallingStrategy.java:32)
	at com.thoughtworks.xstream.XStream.unmarshal(XStream.java:1061)
	at hudson.util.XStream2.unmarshal(XStream2.java:113)
	at com.thoughtworks.xstream.XStream.unmarshal(XStream.java:1045)
	at hudson.XmlFile.unmarshal(XmlFile.java:164)
	... 132 more

<?xml version='1.0' encoding='UTF-8'?>
<build>
  <actions>
    ...
    <hudson.plugins.disk__usage.BuildDiskUsageAction plugin="disk-usage@0.23">
      <buildDiskUsage>...</buildDiskUsage>
      <build class="build">
        <actions>
          ...
          <hudson.plugins.disk__usage.BuildDiskUsageAction reference="../../.."/>
          <org.jvnet.hudson.plugins.DownstreamBuildViewAction plugin="downstream-buildview@1.8">
            <build class="build" reference="../../.."/>
            <downstreamBuilds class="concurrent-hash-map">...
          </org.jvnet.hudson.plugins.DownstreamBuildViewAction>
          ...
        </actions>
        ...
      </build>
    </hudson.plugins.disk__usage.BuildDiskUsageAction>
    <org.jvnet.hudson.plugins.DownstreamBuildViewAction reference="../hudson.plugins.disk__usage.BuildDiskUsageAction/build/actions/org.jvnet.hudson.plugins.DownstreamBuildViewAction"/>
    <hudson.tasks.Fingerprinter_-FingerprintAction reference="../hudson.plugins.disk__usage.BuildDiskUsageAction/build/actions/hudson.tasks.Fingerprinter_-FingerprintAction"/>
    ...
    <org.jvnet.hudson.plugins.DownstreamBuildViewAction plugin="downstream-buildview@1.8">
      <build class="build" reference="../../.."/>
      <downstreamBuilds class="concurrent-hash-map">...
  </actions>
  ...
  <scm class="hudson.scm.NullChangeLogParser" reference="../actions/hudson.plugins.disk__usage.BuildDiskUsageAction/build/scm"/>
  <culprits class="com.google.common.collect.EmptyImmutableSortedSet" reference="../actions/hudson.plugins.disk__usage.BuildDiskUsageAction/build/culprits"/>
</build>