hadoop/hadoop-hdfs-project/hadoop-hdfs-client/dev-support/findbugsExcludeFile.xml

<FindBugsFilter>
  <Match>
    <Or>
      <Class name="org.apache.hadoop.hdfs.protocol.HdfsFileStatus"/>
      <Class name="org.apache.hadoop.hdfs.protocol.LocatedBlock"/>
      <Class name="org.apache.hadoop.hdfs.security.token.block.BlockTokenIdentifier"/>
    </Or>
    <Bug pattern="EI_EXPOSE_REP,EI_EXPOSE_REP2" />
  </Match>
</FindBugsFilter>