我在 Hadoop 集群中的一个或两个节点中遇到此错误，其余节点运行良好：
ERROR org.apache.hadoop.hdfs.server.datanode.DataNode: java.io.IOException:
*********** Upgrade is not supported from this older version of storage to
the current version. Please upgrade to Hadoop-0.14 or a later version and
then upgrade to current version. Old layout version is 'too old' and latest
layout version this software version can upgrade from is -7.
知道如何在不丢失数据的情况下解决此问题吗？